НИЗКОПРОФИЛЬНЫЙ ГРОМКОГОВОРИТЕЛЬ

... 1. Низкопрофильный громкоговоритель, содержащий:- низкопрофильную раму;- первый магнитный узел, размещенный по периметру низкопрофильной рамы, причем первый магнитный узел имеет первую обойму и множество магнитов, размещенных в первой обойме;- опорный узел, имеющий диффузор и опорное кольцо, прикрепленное к диффузору;- звуковую катушку, навитую на опорное кольцо;- при этом опорное кольцо и звуковая катушка подвешены в относительной близости к магнитному узлу, так что опорное кольцо и звуковая катушка осциллируют в ответ на электрические сигналы в звуковой катушке.2. Низкопрофильный громкоговоритель по п.1, дополнительно содержащий обрамление, прикрепленное к низкопрофильной раме и к опорному узлу, причем обрамление имеет внешнюю часть периметра и внутреннюю часть периметра и дуговую часть, которая соединяет внутреннюю и внешнюю части периметра.3. Низкопрофильный громкоговоритель по п.2, в котором обрамление содержит упругий материал.4. Низкопрофильный громкоговоритель по п.3, в котором ...

АКУСТИЧЕСКАЯ СИСТЕМА И ЭЛЕМЕНТЫ ЕЕ КОНСТРУКЦИИ

... 1. Акустическая система, содержащая громкоговоритель, причем указанный громкоговоритель содержит a) по меньшей мере один излучающий звук элемент, b) по меньшей мере первый и второй элементы двигателя, взаимодействующие для перемещения указанного по меньшей мере одного излучающего звук элемента в соответствии с приложенным сигналом, и c) установочные элементы, соединенные с по меньшей мере одним излучающим звук элементом и указанным первым и вторым элементами двигателя, при этом первый элемент двигателя механически соединен с по меньшей мере одним излучающим звук элементом, громкоговоритель содержит по меньшей мере первую и вторую механические массы, которые при работе движутся с разными скоростями в соответствии с приложенным сигналом, первая механическая масса содержит массу по меньшей мере одного излучающего звук элемента, и при этом первая и вторая механические массы механически соединены так, что во время работы громкоговоритель имеет по меньшей мере частотную характеристику четвертого ...

Zweiwegelautsprecher mit schwebendem Wellenleiter

Eine oder mehrere Ausführungsformen der vorliegenden Offenbarung betreffen eine Zweiwegelautsprecherauslegung, die eine kondensierte Geometrie zwischen Niederfrequenz-(LF) und Hochfrequenz- (HF)-Treibern erzwingt und dann einen Mitteltonwellenleiter vor dem LF-Treiber „schweben“ lässt. Dies ist eine Hybridauslegung, die von der großen Nähe akustischer Mittelpunkte profitieren soll, ohne ein Mittelachsenhindernis für den LF-Treiber einzubringen. Außerdem werden die LF- und HF-Wellenleiter und zugehörige akustische Elemente verwendet, um sehr niederfrequente Energie, die von dem LF-Wellenleiter nicht ausreichend unterstützt wird, so umzuleiten, dass sie über andere Wege ungehindert austritt.

Multifunction actuator for e.g. pager, has vibratory and moving coils applying electromagnetic forces on vibratory unit, where forces become coaxial and opposed in order to be cancelled when audio signal is applied simultaneously to coils

The actuator (1) has a moving coil (22) vibrating a diaphragm (21) in response to an audio signal, where the diaphragm generates sound. A vibratory coil (33) generates a vibration in response to an audio or vibratory signal. The coils apply electromagnetic forces on a vibratory unit (30), where the forces become coaxial and opposed to each other in order to be cancelled when the audio signal is applied simultaneously to the coils.

Hi-fi loudspeaker with foil membrane - has coils attached to membrane corresponding to radial magnetic field lines of concentric magnetic rings of drive system

The loudspeaker has a magnetic drive system and a foil membrane with attached coils. The magnetic drive system uses a magnetic disc (1) with concentric rings with opposing polarities in alternation. The membrane carries drive coils (25) and sensor coils (26) corresponding to the radial magnetic field lines of the concentric rings. The sensor coils (26) provide a signal representing the membrane movement, fed to the inverting input of an amplifier (21), providing an output signal fed to the drive coils (25). The latter are associated with frequency bands with a smallest wavelength radiated uniformly over a range of 180 degrees. ADVANTAGE - Optimal electrical damping for exact membrane movement in accordance with input signal.

Lautsprecher

LAUTSPRECHER

Anzeigeeinrichtung

Es wird eine Anzeigeeinrichtung offenbart, die Stereoklang ausgeben kann, wobei die Anzeigeeinrichtung ein Anzeigepanel, das dazu konfiguriert ist, ein Bild anzuzeigen, eine Klangerzeugungsvorrichtung an einer hinteren Oberfläche des Anzeigepanels, eine hintere Abdeckung an der hinteren Oberfläche des Anzeigepanels, die dazu konfiguriert ist, die Klangerzeugungsvorrichtung zu tragen, ein Trennwandelement, das zwischen der hinteren Oberfläche des Anzeigepanels und der hinteren Abdeckung angeordnet ist und dazu konfiguriert ist, das Anzeigepanel in einen ersten, einen zweiten, einen dritten, einen vierten und einen fünften Bereich zu unterteilen, und eine erste, eine zweite, eine dritte, eine vierte und eine fünfte Klangerzeugungsvorrichtung, die an der hinteren Oberfläche des Anzeigepanels befestigt sind und dazu konfiguriert sind, das Anzeigepanel in Vibration zu versetzen, umfasst, wobei die erste, die zweite, die dritte, die vierte und die fünfte Klangerzeugungsvorrichtung im ersten, ...

Lautsprecher mit Mehrpunktantrieb

Montage eines elektroakustischen Wandlers in Schalen von persönlichen Kommunikationsgeräten

Speaker device

Speaker structure comprising two loudspeakers and a weight in communication via a through hole

Improvements in or relating to acoustic transducers

... 604,159. Loud-speakers. OPERADIO MANUFACTURING CO. Oct. 31, 1945, No. 28867. Convention date, Nov. 3, 1944. Drawings to Specification. [Class 40 (iv)] A loud-speaker having a centrally apertured diaphragm, a supporting housing therefor behind the diaphragm, and a field magnet in front of the diaphragm, includes means, which may form the sole support of the magnet, extending through the aperture and rigidly connecting the magnet to the housing. To ensure correct centring of the magnet during assembly, a special jig is used.

Curved loudspeaker.

An electromagnetic loudspeaker comprises a semi-rigid drive surface 4, bearing an imprinted conductor pattern (6, fig. 3) suspended close to an array of rigid, permanent magnets 3; both the array and drive surface having the approximate form of a convex cylindrical segment. The spacing of the magnet array is small, being defined as less than one half wavelength of the maximum frequency to be produced. ...

Speaker structure comprising two loudspeakers and a weight in communication via a through hole

A speaker structure comprises a main speaker unit 311 having a magnetic circuit portion 320 provided with a first through hole 324. A supporting member 370 has a hole portion 371 communicating with the first through hole, and a second through hole 372 pierced from an inner wall surface of the hole portion to an outer peripheral surface of the supporting member. A sub speaker unit 312 is fixed to the main speaker unit via the supporting member. A weight 350 is fixed on the back face side of the main speaker unit and has a main body portion 351 provided with a third through hole 353. The weight is attached to the main speaker unit in a state where the second through hole, the hole portion, the first through hole and the third through hole communicate mutually. A fixing member may be used to join the various parts via their through holes. Either the fixing member or the through holes may include a groove to allow continued air flow with the fixing member in place, thus allowing cooling and ...

Electromagnetic drive arrangement for a loudspeaker with a planar, flexible diaphragm

The drive means comprises a linear conductor 1a borne on the diaphragm 2a and a magnet arrangement 3 mounted in proximity to the linear conductor and arranged to provide a force that is substantially perpendicular to the surface of the diaphragm, substantially proportional to a current within the linear conductor and arranged to provide a substantially constant force over the full range of the diaphragm movement. The magnet assembly is arranged such that north and south poles define a magnetic axis that lies in a plane parallel to the plane of the diaphragm. The linear conductor is arranged such that it extends beyond the end faces of the magnetic poles (fig. 9 for example).

Dynamic loudspeaker

The double diaphragm loudspeaker

This loudspeaker comprises a single moving coil motor unit 3,4 driving mutually opposed diaphragms 5. Both diaphragms are attached to a single voice coil and so as one diaphragm moves inwards the other moves outwards. Preferably the diaphragms 5, their suspensions 6 and their surrounds 7 should be identical.

COAXIAL PLANAR DIAPHRAGM LOUDSPEAKER SYSTEM

Loudspeaker

Actuator

Linear actuator

A linear actuator 1 is provided. The linear actuator comprises: a support structure 2; at least one magnet 3 provided on the support structure 2; a cylindrical carriage 4; at least one coil arrangement 10 provided around the carriage 4; and a spring arrangement 9 operatively connected between the support structure 2 and the carriage 4 to urge the carriage 4 towards a predetermined position relative to the support structure 2. A part of one of the support structure 2 and the carriage 4 is received by a part of the other of the support structure 2 and carriage 4 so as to constrain motion of the carriage 4 relative to the support structure 2 substantially along a longitudinal axis of the linear actuator.

Single-magnet double-tone-circuit coaxial loudspeaker

The loudspeaker comprises a shell 1, a U-shaped iron 2, a magnet 3, a spring washer 4, a first diaphragm assembly 51, an opposing second diaphragm assembly 61, an upper cover 7 and a terminal plate (8, fig 1 & fig 5). The shell 1 includes sound holes (71, fig 4). A single "magnet+ spring washer+ U iron" magnetic circuit extends to the two coaxial diaphragm assemblies. Therefore, the first and second diaphragm assemblies generate a double-magnetic-circuit feature by sharing a single-magnet system. High frequency and low frequency wave bands are driven independently, such that high frequency and low frequency portions can achieve a better sound resolution effect, reduce distortion, thus improving the overall acoustic performance of the loudspeaker.

Loudspeaker driver systems

The system comprises a modulator 120 configured to receive an input signal and to output a pulse width modulated (PWM) signal representative of the received input signal. A delay element 130, 140 applies delays to the PWM output signal to generate a first delayed signal 154 coupled to a second voice coil 114 and a second delayed signal 156 coupled to a third voice coil 116. An undelayed output signal 152 is coupled to a first voice coil 112. The system can be regarded as a FIR filter that may be used to suppress a carrier frequency of the PWM signal. The FIR filter may receive a configuration signal (fig 7) that causes the filter to adapt to a change in the frequency of the PWM signal.

Loudspeaker

Loudspeaker apparatus

Improvements in electro-magnetic apparatus for recording sound

... 194,424. Sykes, A. F. Dec. 16, 1921. Addition to 160,223, [Class 40 (v), Wireless signalling &c.]. Transformers.-Consists in providing in soundrecording apparatus, as claimed in the parent Specification, an intervalve transformer comprising in addition to the usual windings a tertiary winding forming part of a circuit containing resistance, inductance, or capacity, or combinations thereof. Such a transformer, which is of the kind described in Specification 190,840, can be used in place of the inductance, resistance, and condenser distorting devices described in the parent Specification. The general circuit arrangement for the complete apparatus is shown, comprising inter alia a system of thermionic valves 42, 44, 46, the special transformer 163, being placed in the anode circuit of the valve 44 as shown. The tertiary winding 166 of this transformer is in series with a variable inductance 167, a variable resistance 168, and, ii desired, a condenser, not shown. The equivalent additional resistance ...

Loudspeaker

COAXIALLY TWO-WAY HORN LOUDSPEAKER DRIVERS

LOUDSPEAKER

LAUTSPRECHER

LOUDSPEAKER

LOUDSPEAKER

ELECTROACOUSTIC TRANSFORMATION WITH DEVICES FOR THE IMPROVEMENT OF THE LOW FREQUENCIES

LOUDSPEAKER WITH AN ACOUSTIC DIAPHRAGM

Electro-dynamic telephone.

Inner magnetic transducer with multiple magnectic gaps and multiple coils and preparation method thereof

An inner magnetic transducer with multiple magnetic gaps and multiple coils, and a preparation method thereof. The inner magnetic transducer with multiple magnetic gaps and multiple coils includes a non-magnetic material frame and a non-magnetic material bearer frame. The inner magnetic transducer with multiple magnetic gaps and multiple coils includes two or more coaxial annular magnetic gaps with the same diameter value, two suits of symmetric magnetic paths, and a symmetric coil. In the transducer, enwinding direction, connection mode and parameters of coils are decided, in order to ensure that the value of the inductance of coils and the opposing electromotive force obtained during the process of moving to and fro are counteracted by each other. The inner magnetic transducer with multiple magnetic gaps and multiple coils has resistance load character or approximately has a resistance load character, simultaneously, has high sensitivity, high analytic capability, and high fidelity.

Speaker

... [Problem] To provide a speaker which efficiently transmits kinetic energy converted from electric energy of a sound signal without suppressing vibration of a curved diaphragm, enables both a person with impaired hearing and a person with normal hearing to hear without inconvenience by emission of higher-volume and clearer sound, enables weight and size reductions, and can be easily manufactured. [Solution] This speaker 10 is provided with at least a diaphragm 1 that is curved in one direction, a driver unit 2 that vibrates the diaphragm in response to an input electric signal, and a frame body 3 that supports the diaphragm and the driver unit. One end side and the other end side of the diaphragm in the direction of curvature are each attached to the frame body via an edge part 15 that does not interfere with the vibration. The driver unit is brought into contact with one surface of the diaphragm, and securely attached to the frame body.

Multiple voice coil, multiple function loudspeaker

ELECTRODYNAMIC TRANSDUCER HAVING A DOME AND AN INNER HANGING PART

Transducteur électrodynamique (1 ) comprenant : un circuit magnétique (2) définissant un entrefer (15), un équipage mobile (16) comprenant un diaphragme (17) en forme de dôme solidaire d'une bobine (18) mobile plongée dans l'entrefer (15); - un support (20) auquel est suspendu l'équipage mobile (16); une suspension (26) assurant la liaison entre l'équipage mobile (16) et le support (20). Dans ce transducteur, le support (20) s'étend au moins en partie dans un volume interne à l'équipage mobile (16), la suspension (26) est fixée, par une périphérie externe, à une face interne de l'équipage mobile (16), et la suspension (26) est réalisée dans un matériau non émissif acoustiquement.

LINEAR ACTUATOR

A linear actuator comprising a support structure; at least one magnet provided on the support structure; a carriage; at least one coil arrangement provided around the carriage; and a spring arrangement operatively connected between the support structure and the carriage to urge the carriage towards a predetermined position relative to the support structure; wherein a part of one of the support structure and the carriage is received by a part of the other of the support structure and carriage so as to constrain motion of the carriage relative to the support structure substantially along a longitudinal axis of the linear actuator.

DOUBLE-DOME SPEAKER

A loudspeaker comprising a moving coil and a membrane fastened to a chassis, where the membrane is divided into a concentrically disposed inner membrane part and a concentrically disposed outer membrane part, whereby a meeting area is defined between the inner membrane part and the outer membrane part, the inner membrane part being fastened to an inner moving coil and the outer membrane part being fastened to an outer moving coil.

Elektrodynamisches Telephon.

Procédé et appareil pour aider l'audition.

Elektrodynamischer Lautsprecher, auch als Mikrophon verwendbar.

DIAPHRAGM FOR ELECTROACOUSTIC TRANSDUCER SYSTEMS.

Floating membrane to produce sound waves.

Die erfindungsgemässe Vorrichtung besteht aus einer elektrischen Schaltung zur Erzeugung von elektromagnetischen Wellen und einer zugehörigen, mittels der elektromagnetischen Wellen zu Schwingungen anregbaren Membran zur Erzeugung von Schallwellen. Elektrische Energie wird kontaktfrei auf die Membran (1) übertragen und dazu eingesetzt, eine magnetische Kraft zu erzeugen, welche die Membran kontaktfrei in einem stabilen Schwebezustand hält. Zum Beispiel kann die Membran (1) kreisrund ausgeführt sein und ein zentrales Loch (5) aufweisen, wobei der Randbereich der Membran am Loch mit einem magnetisierbaren Material beschichtet ist, und wobei sich durch dieses Loch ein Stator (3) mit Wicklung eines Primärsystems (2) erstreckt. Im Randbereich der Membran (1) zum Loch von unten und oben ist der Stator (3) so herangeführt, dass er einen umlaufenden Spalt (4) bildet. Im peripheren Bereich der Membran (1) weist diese unten einen Steg (11) auf, der in den Spalt von mindestens drei um den Umfang der ...

ПРЕОБРАЗОВАТЕЛЬ С ВНУТРИРАМОЧНЫМ МАГНИТОМ И СО СТРУКТУРОЙ МНОГОМАГНИТНЫХ ЗАЗОРОВ И НЕСКОЛЬКИХ ОБМОТОК И ЕГО МЕТОД ПОДГОТОВКИ

Данное изобретение касается одного преобразователя, особенно преобразователя с внутрирайонным магнитом и со структурой многомагнитных зазоров и нескольких обмоток, относится к области электрического электрозвукового преобразователя и электромеханического преобразователя.

ГРОМКОГОВОРИТЕЛЬ И БЛОК ГРОМКОГОВОРИТЕЛЕЙ

Громкоговоритель содержит магнитный узел, который образует магнитное поле, и мембрану, установленную в раме и снабженную электрическим проводом, расположенным в виде структуры на мембране, причем мембрана ориентирована в магнитном поле таким образом, что при подаче тока через проводниковую структуру мембраны возникает сила, которая способна вызывать колебание мембраны с обеспечением создания звука, при этом громкоговоритель имеет звуковые проходы, расположенные между областями колебаний и наружной стенкой громкоговорителя и сообщающиеся с рупором, имеющим расходящиеся стенки, и отличается тем, что, по существу, одинаковые звуковые проходы и связанные с ними рупоры расположены с обеих сторон мембраны.

COAXIAL DUAL-VOICE-COIL DRIVER

Acoustic transducer assembly

Bidirectional loudspeaker with floating waveguide

Cinema projection screen with sound reproduction - has solid ply sheet with vibrators attached to sides for sound reproduction

Electrodynamic engine of great power

HAUT-PARLEUR DYNAMIQUE

L'INVENTION CONCERNE UN HAUT-PARLEUR DYNAMIQUE DU TYPE A PLAQUE VIBRANTE PLANE ET A PLUSIEURS POINTS D'ATTAQUE. CE HAUT-PARLEUR COMPORTE UN CADRE QUI SUPPORTE UNE MEMBRANE PLANE ET LES EXTREMITES AVANT DE PLUSIEURS MOTEURS MAGNETIQUES. DES BRAS DE LIAISON EN DIAGONALE ET UNE ENTRETOISE EN FORME DE CROISILLON RAIDISSENT LE SUPPORT DES MOTEURS MAGNETIQUES POUR REDUIRE LES FLEXIONS DUES A DES VIBRATIONS. L'INVENTION S'APPLIQUE NOTAMMENT A DES HAUT-PARLEURS DE FORCE CARREE, A QUATRE MOTEURS.

HAUT-PARLEUR

... a. Haut-parleur comprenant un diaphragme formé d'une première et d'une seconde peaux et d'une ame intermédiaire. b. Haut-parleur caractérisé en ce que les peaux sont réalisées en un matériau ayant une vitesse de propagation de l'onde longitudinale, supérieure à 5000 m/sec, et le noyau est réalisé en un matériau ayant un module d'élasticité et de cisaillement Gco supérieur à la valeur donnée par la formule : ...

Device for the recording of the sounds

Improvements with the producing apparatuses of sounds

TELEPHONE RECEIVING CAPSULE COMPATIBLE WITH THE HEARING AIDS FOR DEAF PEOPLE

Process and apparatus to help hearing

MOTOR VEHICLE COMPRISING AN INTEGRATED AUDIO SYSTEM AND AN EMERGENCY CALL BOX

Véhicule automobile (V) équipé d'un système audio intégré (15) comportant au moins un transducteur électroacoustique (10), et d'un boitier d'appel d'urgence autonome (13) comportant des moyens de restitution de la voix d'un opérateur du centre d'assistance auquel le boitier (13) est connecté, et des moyens d'alimentation électrique propre à alimenter le boitier, caractérisé en ce que les moyens de restitution de la voix correspondent à une première voie (11) d'un transducteur électroacoustique (10), dédiée à la restitution de la voix humaine issue du boitier d'appel d'urgence (13) ; la deuxième voie (12) appartenant au système audio (15) intégré au véhicule (V), dédiée à la restitution de fréquences audio du système audio (15).

Reduced parasitic coupling mobile telephone having loudspeaker processing circuits with high/low impedance electrical/mechanical drive coils switch activated for personal/hands free listening.

Pour réduire les effets de champs électromagnétiques perturbateurs intenses sur un haut-parleur (3) d'un téléphone mobile (1), on munit le haut-parleur de deux bobines (18, 20) : une première bobine haute impédance sert à exciter le haut-parleur pour une écoute discrète, une deuxième bobine basse impédance sert à exciter le haut-parleur pour une écoute mains libres. On montre qu'on réduit des effets néfastes de burst sans consommer excessivement d'énergie électrique.

AN ELECTRO-ACOUSTIC TRANSDUCER WITH TWO DIAPHRAGMS

The present invention relates to an electro-acoustic transducer suitable for applications within mobile communication equipment and hearing aids. The transducer comprises two diaphragms positioned on opposite sides of a magnetic circuit having two magnetic gaps. When used as a microphone the transducer is substantially insensitive to vibrations, and when used as a speaker the transducer generates only very low vibration levels. The magnetic circuit has a number of advantages compared to conventional transducers with circular magnetic. The transducer can be made lightweight and with very compact dimensions compared to conventional designs. In a preferred embodiment the diaphragms are rectangular. The transducer may additionally be used as a vibration generator for silent alarm signals. © KIPO & WIPO 2007 ...

A LOUDSPEAKER WITH LEAD WIRES EXTENDING THROUGH THE MAGNETIC ASSEMBLY AND INTEGRATED WITH AN AMPLIFIER

A fully integrated, low cost, amplified electro-acoustic loudspeaker is disclosed, comprising a magnetic assembly with a magnetic gap and an opening, a voice coil wound around a former and placed in the gap, with at least one wire connected to said voice coil through said opening. Furthermore, a loudspeaker is disclosed in which an amplifier circuit (30, 130, 230, 330, 930, 1030), radio-frequency receiver amplifier circuit (430, 530), optical receiver amplifier circuit (630, 730), or network based amplifier circuit (830) is directly mounted on the loudspeaker's magnetic assembly (105, 505, 705, 805), contained within the loudspeaker's moving assembly (20, 29, 629, 42, 45, 50, 65), or a combination thereof. The amplified loudspeaker's magnetic assembly (5, 105, 405, 505, 705, 805, 905, 1005) is utilized as an electro-magnetic interference shield and/or a heat dissipating element for the attached electronic circuitry. In selected embodiments of the amplified loudspeaker system, the former ...

LOUDSPEAKER WITH A THREE-DIMENSIONAL DIAPHRAGM

An electrodynamic loudspeaker comprising a chassis (2), a three-dimensional diaphragm (8) and an electromagnetic actuator (6). The diaphragm is connected to the chassis by a first flexible connecting means (18) provided near a front part (8a) of the diaphragm and by a second flexible connecting means (20) provided near a back part (8b) of the diaphragm. The actuator includes a stationary actuator element (6a) fixed to the chassis and a translatable actuator element (6b) fixed to the diaphragm. When energized, both actuator elements magnetically co-operate with one another over an air gap (16). In order to realize a flat but powerful speaker, the device as such and the air gap are outside the area (26) enclosed by the diaphragm but within the space (24) between both connecting means.

LOW-PROFILE SPEAKER

A low-profile speaker that includes a low-profile frame, and a first magnet assembly disposed in the low-profile frame. The first magnet assembly has a first cage and a plurality of magnets disposed in the first cage. The low-profile speaker also includes a support assembly having a cone and a support ring attached to the cone, and a voice coil attached to the support ring. The support ring and voice coil are suspended in relatively close proximity to the magnet assembly such that the support ring and voice coil oscillate in response to electrical signals in the voice coil.

Transducer holder

A transducer comprising: a flat strip of metal formed into a closed metal loop with two substantially parallel sides and rounded corners, a solenoid fixed to a surface on a first parallel side, and fixed magnets attached to an opposite parallel side of the trapezoidal shape to bring the fixed magnets into proximity with the solenoid, wherein at least one lateral side of the trapezoidal shape coupling said parallel sides has a continuously varying width, resulting in the transducer being able to resonate with high fidelity over a range of frequencies in response to reception of a signal comprising varying frequencies.

Loudspeaker

A loudspeaker includes a flat plate diaphragm mounted in a speaker frame and which is driven by a plurality of magnetic drivers each having a magnetic gap, a voice coil bobbin connected to the diaphragm at a respective node portion of the divided vibration mode and a voice coil in the respective magnetic gap and being wound around the voice coil bobbin therein. Rotational vibration of the diaphragm is prevented by a pole member which is connected from the center of the diaphragm to a damper supported behind the speaker frame on a damper supporting frame. The leverage due to the longer length of the pole member makes the damper member more effective in resisting rotational vibration. The damper supporting frame is mechanically connected to the speaker frame and/or magnetic drivers to add stiffness to the structure.

Electro-acoustic transducer with two diaphragms

The present invention relates to an electro-acoustic transducer suitable for applications within mobile communication equipment and hearing aids. The transducer comprises two diaphragms positioned on opposite sides of a magnetic circuit having two magnetic gaps. When used as a microphone the transducer is substantially insensitive to vibrations, and when used as a speaker the transducer generates only very low vibration levels. The magnetic circuit has a number of advantages compared to conventional transducers with circular magnetic. The transducer can be made lightweight and with very compact dimensions compared to conventional designs. In a preferred embodiment the diaphragms are rectangular. The transducer may additionally be used as a vibration generator for silent alarm signals.

Loudspeaker Design

A loudspeaker in which a plurality of speaker drivers is jointly tasked with reproducing sounds. The plurality of speaker drivers is arranged on the loudspeaker so as to achieve a desired sound effect at a listening position. The plurality of speaker drivers is arranged in an arcuate arrangement or in a sinusoidal arrangement. The desired sound effect may be facilitated or enhanced by modifying the timing of sounds emanated from each of the plurality of speaker drivers. Alternatively, sounds may be sent to each of the plurality of speaker drivers substantially simultaneously. The sound effect achieved may be a time-alignment effect such that the sound arriving at the listening position is time-aligned to maximize constructive interference between the various speaker drivers of the plurality of speaker drivers. Alternatively, the sound effect achieved by other implementations may be a progressive kick in sound waves moving along the arcuate or sinusoidal arrangement. 1. A loudspeaker comprising:a first plurality of substantially similar speaker drivers disposed on a front panel of a speaker cabinet, the first plurality of substantially similar speaker drivers being disposed in an arcuate arrangement adapted to modify time alignment of a sound signal produced by each of the first plurality of substantially similar speaker drivers at a listening position.2. The loudspeaker of claim 1 , wherein the front panel of the speaker cabinet is substantially planar claim 1 , and the first plurality of substantially similar speaker drivers is mounted in a single plane substantially parallel to a plane of the front panel of the speaker cabinet.3. The loudspeaker of claim 2 , wherein the first plurality of substantially similar speaker drivers each has a driver axis claim 2 , and wherein the driver axis of each of the first plurality of substantially similar speaker drivers is substantially perpendicular to the plane of the front panel of the speaker cabinet.4. The loudspeaker of ...

Dual voice coil speaker

A speaker includes a diaphragm having a principal vibration part and annular internal and external supports for supporting the principal vibration part, a large-diameter voice coil unit mounted at the outer edge of the principal vibration part, a small-diameter voice coil unit mounted at the inner edge of the principal vibration part, and a yoke integrated with the diaphragm. Positioning members fixed to the diaphragm as well as secured to a predetermined site of the yoke are provided for restricting the positions of the diaphragm relative to the yoke in a radial direction and an axial direction perpendicular to the radial direction so that the large-diameter voice coil unit and the small-diameter voice coil unit are arranged within respective magnetic gaps in a magnetic circuit.

High power voice coil

A voice coil for use with a loudspeaker. The voice coil includes a bobbin that has a first layer of a non-conductive material infused with a high-temperature adhesive, a second layer of a non-conductive material infused with a high-temperature adhesive, and a layer of thermally-conductive material located in between the first layer of a non-conductive material and the second layer of a non-conductive substance, and a conductive wire wrapped around the bobbin.

FLAT-TYPE SPEAKER HAVING N MAGNETS AND N+1 VOICE COIL PLATES

The present invention relates to a flat-type speaker, and more particularly, to a flat-type speaker having one magnet for transferring vibration into a diaphragm and two voice coil plates in one magnetic circuit, wherein the voice coil plates are coupled to both sides of the magnet. The flat-type speaker in which n magnets and n+1 voice coil plates are coupled to each other consists essentially of: the magnet positioned on a central portion; a pair of yoke plates having magnetic bodies spaced a predetermined distance apart from the magnet, such that the magnet is between the yoke plates; two voice coil plates having voice coils inserted between the magnet and one of the yoke plates and between the magnet and the other yoke plate; and a diaphragm vibrated by receiving the vibration of the voice coil plates in a state where the diaphragm contacts upper ends of the voice coil plates.

PRODUCTION OF VOICE-COIL TYPE LINEAR ACTUATORS, ARRANGEMENT USING THE ACTUATORS, AND THE ACTUATORS

PROBLEM TO BE SOLVED: To provide the voice-coil type linear actuator attaining miniaturization, while being capable of obtaining high thrust. SOLUTION: This voice coil type linear actuator is provided with a shaft-shaped center yoke 1, consisting of ferromagnetic material, an armature coil 6 arranged movably along axially the center yoke 1, and an annular permanent magnet 2 arranged concentrically related to the armature coil 6 further equipped with an NS magnetic pole in the radial direction. The armature coil 6 has armature coil parts 18, 19 and 20 arranged distributively in at least axially three parts, while the fellow armature coil parts axially adjacent to each other are constituted, in a manner of a current flowing in a reverse direction to each other, the permanent magnet 2 is arranged distributively in at least axially three parts, in a position opposed in the radially direction respectively relating to each armature coil part, additionally an orientation of the fellow NS magnetic ...

ELEKTRODYNAMISCHER LAUTSPRECHER MIT RUNDUM-SCHALLABSTRAHLUNG

ELEKTROAKUSTISCHER WANDLER MIT SCHALLABSTRAHLENDEM VOLUMEN

Loudspeaker

A coaxial loudspeaker apparatus 10 comprises a first drive unit 20 arranged to propagate sound in a first frequency range and a second drive unit arranged to propagate sound in a second frequency range that is higher than the first frequency range A first fixed waveguide 30 receives sound from the drive unit 20. A second moving waveguide 60 is arranged to extend substantially in prolongation of the first waveguide 30 and a third waveguide 100 is arranged to extend substantially in prolongation of the second waveguide 60.

Actuator

Improved speaker

... 354,148. Loud-speakers. I D E A L WERKE AKT.-GES. FUR DRAHTLOSE TELEPHONIE, 97, Grosse Leegestrasse, Hohenschonhausen, Berlin. Dec. 12, 1930, No. 37579. Convention date, May 13. Drawings to Specification. [Class 40 (iv).] A loud-speaker chassis has its rear flat face provided with a number of holes so arranged that the one chassis can be used with different types of driving unit. Each set of holes is marked with characteristic reference characters, the characters for each set being preferably arranged at a different angle from those of the other sets so that any particular set of holes can be readily recognized. The whole chassis is formed from very thin sheet metal and the back-plate is provided with strengthening plates having threaded holes therein adapted to receive the securing bolts for the driving units.

Improvements in or relating to diaphragms more particularly for loud speakers and the like

... 287,065. Siemens & Halske Akt.- Ges. March 12, 1927, [Convention date]. Diaphragms; loud-speakers; magnetic instruments. - A diaphragm for acoustic instruments comprises two or more rigid surfaces, each lying in the same plane hingedly connected together and to a stationary support. As shown in Fig. 2, two surfaces s<1>, s<2> stiffened by ribs or corrugations, which may be of rectangular cross-section, are connected together elastically, by a longitudinal corrugation w<2> which acts in the manner of a hinge and the surfaces are supported on a frame through the intermediary of the elastic corrugations w', w'. As applied to electromagnetic instruments, the - diaphragm is driven by armatures secured at points along the corrugation w<2>. In a modification, two flat surfaces connected together and supported by elastic material are used. Instead of stiffening the surfaces by corrugations &c., an additional layer of material may be employed. The diaphragm may be driven by a current conductor riveted ...

Improvements in or relating to loudspeakers and like electro-acoustic transducers

... 622,828. Loud-speakers. ROBSON, D. S. May 16, 1947, No. 15072/46. [Class 13] [Also in Group XXXIX] In a loud-speaker or like electro-acoustic transducer, a diaphragm 46, unsupported around its outer periphery (see Group XXXIX), is placed at the junction of a pair of outwardly diverging cone frustums 14, 16.

Earphones with compound drive units and level control

An earphone uses a compound or dual drive unit 40 comprising a first driver 42 and a second driver 44. The two drivers share a common magnetic system 48 and are coaxial with each other. A plurality of vents 126 allow sound from region 124 behind the diaphragm 58 to pass into the mixing region 128 and ultimately into the listener's ears. Variable resistors (figs 10a, 10b) are used to control the relative levels of audio signals passed to the drivers.

Silencer and speaker device

Compensation of rising frequency response in passive current-driven loudspeakers

The sound quality of electro-dynamic loudspeakers can be very much improved by feeding the speaker drivers with a current signal instead of the conventional voltage signal. Current-mode is achieved, when the source impedance seen by the driver is high compared to the driver's own impedance. The problem is that, under current-drive, the rising frequency response of a typical cone-type speaker cannot be equalized simply by adding an RC-network in parallel with the driver because then the high source impedance is lost. In this solution a dual voice coil 4a, 4b speaker driver is used together with a current dividing network 5, 6, 7 that disables one of the voice coils at high frequencies, thus producing the required response correction while still preserving relatively high source impedance. Other embodiments are disclosed (figs 5 and 6).

Method of making an actuator

A method of making an actuator comprises: providing a plurality of force elements 30, 32, 34 and a coupler located between the force elements and a load 12; calculating a transfer function for each force element 30, 32, 34 and predicting the force provided to the load 12; determining the parameters of the force elements which minimise undesired force characteristics and providing an actuator including force elements with the determined parameters. The parameters may be the location of the force elements 30, 32, 34 on the coupler and the force applied by each force element. The coupler may be a resonant element with a plurality of bending wave anodes and the said undesired force characteristic may be at least one anti-resonance. The force elements may be located on or near nodal points associated with at least one anti-resonance mode or second and third resonant anodes to suppress at least one of the second or third resonant modes. The said transfer function may be obtained by measurement ...

Improved speaker

Loudspeaker Assembly.

... 1,157,463. Loud-speakers. ELECTRONIC RESEARCH ASSOCIATES Inc. 2 Aug., 1966 No. 34569/66. Heading H4J. A loud-speaker assembly comprises a substantially flat diaphragm supported at its edges by a frame which is acoustically compatible therewith, the frame and the diaphragm being composed of plastics material, one or both being of cellular plastics material, e.g. cellular polystyrene. The materials of the diaphragm and support frame are matched acoustically to reduce undesired resonance effects, whilst providing a lightweight assembly. A method of assembling such a loud-speaker is described. In one embodiment, the diaphragm 2, Figs. 2 and 3, is substantially flat and is moulded integral with the rectangular frame 4, which is slightly thicker than the diaphragm. The frame also comprises ribs 6 which support the magnet assembly and diagonal reinforcing ribs 10. The ribs 6 and 10 and frame are shaped so that sound is projected forward or backward from the whole assembly. The magnet assembly ...

CURVED LOUDSPEAKER

LOUDSPEAKER

Acoustic transducer

A thin film member formed of a synthetic resin material, a paper material or a non-magnetic metal foil material is provided on its both surfaces with conductors. The thin film member is then corrugated, as by folding, to form a number of elongate, arcuate corrugations which serve as a diaphragm. Rod-like permanent magnets extending perpendicularly to the conductors on each trough in the corrugations and generating magnetic flux in the same direction are retained over substantially the entire length between adjacent trough portions. The diaphragm is supported on both surfaces of each side edge thereof by support members which are expandable and contractable only in the direction extending perpendicularly to the diaphragm.

HEARING AID WITH MINIATURE LOUDSPEAKER

ACHIEVEMENT AMPLIFIER

CONCENTRIC CO-PLANAR MULTIBAND ELECTRO-ACOUSTIC CONVERTER

A compound loudspeaker drive unit comprising a first drive unit and a second drive unit arranged co-axial with respect to the center axis of the loudspeaker, and each drive unit comprises permanent magnet means and pole piece means together forming a magnetic circuit with a pole gap for exciting a voice coil assembly, each pole gap providing magnetic field directed radially with respect to a center axis of the loudspeaker. At least one of the permanent magnet means has a radially extending magnetization direction with respect to said center axis of the loudspeaker and the acoustic centers of said drive units substantially coincide.

APPARATUS AND METHOD FOR SOUND WAVE GENERATION AND ACTIVE NOISE REDUCTION

A method for sound wave generation includes sensing characteristics of a sound wave; calculating an inverted sound wave; and emitting the inverted sound wave by flowing a current through a wire under tension that passes through a positive pole of a magnet and a negative pole of the magnet, thereby causing the wire to vibrate. An apparatus for sound wave generation includes a microphone configured to detect characteristics of a sound wave; a processor, configured to calculate an inverted sound wave; a power supply; and at least one emitter module coupled to the processor, each emitter module including one or more magnets, a wire, made of a conductive material, under tension, that passes between the positive and negative poles of the one or more magnets, and the power supply configured to deliver a current through the wire to vibrate the wire and emit the inverted sound wave.

Voice coil for speaker device, and speaker device

To provide a thin speaker device a voice coil itself is made thin and vibration of the voice coil is efficiently transmitted to a diaphragm. The voice coil is used for a speaker device in which the vibration in one axial direction of the voice coil is transmitted to the diaphragm via a rigid vibration direction converter part, and the diaphragm is vibrated in a direction different from the one axial direction. The voice coil is formed with planarly and annularly wound conducting member and has rigidity at least in the vibration direction along the planar direction.

Speaker

A speaker includes a base defining a pair of receiving cavities separated from each other in a longitudinal direction and an engaging portion disposed between the pair of receiving cavities, a pair of magnetic circuit systems received into the pair of the receiving cavities, a diaphragm attached on the base, a pair of voice coil members connecting with the diaphragm, and a suspension mounted on the base. The suspension defines a pair of separating portions separated from each other in a lateral direction. Each separating portion defines a fixing portion engaging with the engaging portion of the base, a pair of connecting portions extending from two ends of the fixing portion and towards the diaphragm, and a pair of supporting portions connecting with the connecting portion for engaging with the pair of voice coil members, respectively.

Speaker assembly incorporating woofer and tweeter

An exemplary speaker assembly includes a woofer, a tweeter, and a bracket supporting the tweeter within the woofer. The woofer includes a magnetic circuit unit defining a magnetic gap, a frame attached on the magnetic circuit unit, a diaphragm attached to the frame, and a voice coil attached to the diaphragm and extending into the magnetic gap. The bracket includes an outer ring fixed relative to the frame, an inner ring surrounded by the outer ring, and ribs interconnecting the outer ring and the inner ring. The tweeter includes a main body, a supporting body, and a confining body. The supporting body is partly received in and abuts against the inner ring.

Speaker

A speaker includes: a plurality of voice coil bobbins, each of which includes a voice coil; a diaphragm, which provided with the plurality of voice coil bobbins; and a wiring material fixed to the diaphragm, wherein each of the plurality of the voice coil bobbins is disposed next to an next voice coil bobbin, wherein the wiring material is fixed to a portion of the diaphragm between the next voice coil bobbin, wherein a one-side conductive line of voice coil bobbins is extended in a direction toward the next voice coil bobbin and is connected to the wiring material that is disposed between the voice coil bobbins, wherein the other-side conductive line is extended in another direction different from the direction of the one-side conductive line, and wherein the each of the plurality of voice coils is connected in series.

Loudspeaker driver with dual electromagnet assemblies

Loudspeaker drivers are provided. According to one embodiment, a loudspeaker driver comprises a diaphragm, a connection tube, first and second voice coils, and first and second magnet assemblies. The connection tube has a first end section, a second end section, and a middle section. The first voice coil is connected to and surrounds at least a portion of the first end section. The second voice coil is connected to and surrounds at least a portion of the second end section. The first magnet assembly is configured to suspend the first voice coil in a first magnetic field and the second magnet assembly is configured to suspend the second voice coil in a second magnetic field. The connection tube intersects the diaphragm and the middle section of the connection tube is connected to the diaphragm.

SCREEN SOUND GENERATION DEVICE

A screen sound generation device includes a screen configured for vibrating and generating sound, an exciter configured for driving the screen to vibrate and generate sound, and a middle frame configured for receiving and fixing the screen and the exciter. The vibration direction of the exciter is perpendicular to the screen. The screen sound generation device further includes a fixing part by which the exciter is detachably fixed to a side of the screen. The fixing part includes a limit block with a threaded hole therein and a steel sheet attached to the screen, the limit block is fixed to the steel sheet, and the exciter is fixed to the steel sheet by a connecting structure with threads. The screen sound generation device according to the present disclosure provides a flexible assembly method, a reduced difficulty of assembly and an improved working efficiency. 1. A screen sound generation device comprising:a screen configured for vibrating and generating sound;an exciter configured for driving the screen to vibrate and generate sound, a vibration direction of the exciter being perpendicular to the screen; anda middle frame configured for receiving and fixing the screen and the exciter;wherein the screen sound generation device further comprises a fixing part by which the exciter is detachably fixed to a side of the screen; andthe fixing part comprises a limit block with a threaded hole therein and a steel sheet attached to the screen, the limit block is fixed to the steel sheet, and the exciter is fixed to the steel sheet by a connecting structure with threads.2. The screen sound generation device according to claim 1 , wherein the steel sheet is fixed to the screen by double-sided adhesive or liquid adhesive.3. The screen sound generation device according to claim 1 , wherein the limit block is fixed to the steel sheet by welding or bonding.4. The screen sound generation device according to claim 1 , wherein the exciter comprises a yoke with a first installation ...

ACOUSTIC TRANSDUCER

An acoustic transducer includes a first acoustic module and a second acoustic module. The first acoustic module includes a first motor, a first rod driven by the first motor, and a first vibrating plate connected to the first rod and vibrating. The second acoustic module includes a second motor, a second rod driven by the second motor, and a second vibrating plate connected to the second rod and vibrating. The first rod and the second rod are coaxially with each other. 1. An acoustic transducer comprising:a first acoustic module comprising a first motor, a first rod driven by the first motor, and a first vibrating plate connected to the first rod; anda second acoustic module comprising a second motor, a second rod driven by the second motor, and a second vibrating plate connected to the second rod,wherein the first rod and the second rod are coaxially arranged.2. The acoustic transducer of claim 1 , wherein the first acoustic module and the second acoustic module are arranged to face each other in an axial direction of the first and second rods.3. The acoustic transducer of claim 2 , wherein the first and second vibrating plates have an elongated shape with a major axis and a minor axis.4. The acoustic transducer of claim 3 , wherein the first rod comprises two or more first rods claim 3 , and the first vibrating plate is connected to the two or more first rods claim 3 , and the second rod comprises two or more second rods claim 3 , and the second vibrating plate is connected to the two or more second rods.5. The acoustic transducer of claim 4 , wherein the two or more first rods and the two or more second rods make pairs with and are coaxial with each other.6. The acoustic transducer of claim 3 , wherein the first acoustic module comprises a plurality of first vibrating plates arranged in an axial direction of the first rod claim 3 , and the second acoustic module comprises a plurality of second vibrating plates arranged in an axial direction of the second rod.7. ...

SPEAKER

A speaker comprises at least four diaphragms, inner connecting rods, outer connecting rods, and a cavity sealing housing. Diaphragms spaced apart from each other respectively form a set of diaphragms. The two sets of diaphragms move relative to each other. Connecting points are provided on rigid domes of each of the diaphragms. The inner connecting rods are connected to the diaphragms via the connecting points on the domes. The inner connecting rods respectively connected to the two sets of diaphragms are connected one to another via different outer connecting rods. Cavities of the speaker are formed between adjacent diaphragms. Cavities spaced apart from each other jointly form a front acoustic cavity. The cavities adjacent to the front acoustic cavity form a rear acoustic cavity. The cavity sealing housing seals the front acoustic cavity/rear acoustic cavity, thus allowing separation of the front and rear acoustic cavities of the speaker. 1. A speaker comprising at least four diaphragms , inner connecting rods , outer connecting rods , and a cavity sealing housing , whereinall the diaphragms forms two groups of the diaphragms, and the diaphragms of the two groups are alternately arranged, and the two groups of the diaphragms move relative to each other; connecting points are provided on domes of each of the diaphragms, respectively, and the inner connecting rods are connected with the diaphragms via the connecting points on the domes, and the inner connecting rods, which are connected with the two groups of diaphragms, respectively, are connected with each other via different outer connecting rods, respectively; andcavities of the speaker are formed between adjacent diaphragms, and cavities that are spaced apart from each other jointly form a front acoustic cavity of the speaker, and the cavities adjacent to the front acoustic cavity form a rear acoustic cavity of the speaker, and the cavity sealing housing seals the front acoustic cavity or the rear acoustic ...

MULTIPLE PATH ACOUSTIC WALL COUPLING FOR SURFACE MOUNTED SPEAKERS

A surface mounted loudspeaker design is provided that mitigates the interference between direct low frequency (LF) energy and reflected LF energy by breaking the LF energy from an LF driver into multiple paths using one or more of waveguides, driver load plates, and enclosure ports to diffuse the reflected energy and minimize frequency response errors. One or more embodiments of the present disclosure provides a loudspeaker have multiple acoustic exits strategically designed and located to generate, for example, three major wave front arrivals—2 source and 1 reflection—at target angles with favorable lag times, mitigating the cancellation notching and frequency errors that occur in conventional loudspeaker designs. 1. A loudspeaker comprising:a speaker enclosure adapted for surface-mounting and including a front surface having at least one front acoustic exit facing a target direction and a rear surface having at least one rear acoustic exit adapted to face a wall surface; anda low-frequency (LF) driver disposed in the speaker enclosure and adapted to emit LF acoustic energy that exits at least the front acoustic exit and the rear acoustic exit, the LF acoustic energy exiting the front acoustic exit and radiating directly in the target direction forming a first LF energy wave front, the LF acoustic energy exiting the front acoustic exit and reflecting off the wall surface forming a second LF energy wave front that lags the first LF energy wave front, the LF acoustic energy exiting the rear acoustic exit and radiating directly in the target direction combined with the LF acoustic energy exiting the rear acoustic exit and reflecting off the wall surface forming a third LF energy wave front that arrives between the first LF energy wave front and the second LF energy wave front.2. The loudspeaker of claim 1 , wherein the first LF energy wave front has a magnitude of 0.80 claim 1 , the second LF energy wave front has a magnitude of 0.50 and lags the first LF energy wave ...

SPEAKER APPARATUS

A speaker apparatus according to an embodiment includes a panel, one or more vibration elements, a drive unit, and a reflection part. The one or more vibration elements vibrate the panel. The drive unit applies a driving signal to the one or more vibration elements to form a striped vibration region on the panel. The driving signal is obtained by modulating a carrier wave of an ultrasonic band by a sound signal of an audible frequency band. The reflection part reflects at least one of first and second ultrasonic waves, which are generated from the vibration region and advancing in respective different directions, so as to bring an advancing direction of the first ultrasonic wave and that of the second ultrasonic wave close to each other. 1. A speaker apparatus comprising:a panel;one or more vibration elements that vibrate the panel;a drive unit that applies a driving signal to the one or more vibration elements to form a striped vibration region on the panel, the driving signal being obtained by modulating a carrier wave of an ultrasonic band by a sound signal of an audible frequency band; anda reflection part that reflects at least one of first and second ultrasonic waves, which are generated from the vibration region and advancing in respective different directions, so as to bring an advancing direction of the first ultrasonic wave and that of the second ultrasonic wave close to each other.2. The speaker apparatus according to claim 1 , wherein the reflection part is arranged close to an end part of the panel claim 1 , and includes a reflection plate extending in a direction intersecting with the panel.3. The speaker apparatus according to claim 1 , whereinthe reflection part is arranged in a position opposite to a surface of the panel, and includes a plurality of reflection members that extends in an extending direction of a plurality of line-shaped vibration regions forming the striped vibration region and is arrayed along an alignment direction of the plurality ...

MAGNETIC FIELD CANCELING AUDIO SPEAKERS FOR USE WITH BURIED UTILITY LOCATORS OR OTHER DEVICES

Magnetic field cancelling audio speakers and associated devices are disclosed. In one embodiment, a utility locator includes an audio speaker device with two loudspeaker drivers positioned and electrically connected to reduce emitted magnetic fields over a range of frequencies corresponding with locator sensing frequencies. 1. A buried utility locator system , comprising:a buried utility locator, including:a housing;a magnetic field antenna array disposed on or in the housing for receiving magnetic field signals emitted from a hidden or buried conductor based on current flow therein and providing corresponding electrical output signals; anda utility locator electronics circuit disposed on or in the housing and operatively coupled to the magnetic field antenna array output to receive the electrical output signals and generate information about the hidden or buried conductor;an audio signal generator and audio amplifier operatively coupled to the utility locator electronics circuit to generate and provide an audio output signal associated with operation of the utility locator; andan audio speaker device, comprising:a speaker enclosure;input wiring operatively coupled to the audio output signal;a first electrostatic loudspeaker driver having terminals operatively coupled to the input wiring to receive the audio output signal with a first polarity; anda second electrostatic loudspeaker driver, of the same type as the first loudspeaker driver, having terminals operatively coupled to the input wiring to receive the audio output signal with a second polarity;wherein the first loudspeaker driver and the second loudspeaker driver are positioned within the speaker enclosure so as to at least partially cancel alternating current (AC) magnetic field signals emitted therefrom over a predefined frequency or range of frequencies overlapping the frequency or range of frequencies emitted from the hidden or buried conductor.2. The locator device of claim 1 , wherein the audio speaker ...

Double Voice Coil Loudspeaker Transducer Unit

The present invention discloses a loudspeaker driver comprising a magnet system having at least one gap where in each gap a voice coil assembly is arranged for movement in the gap, wherein either two distinct coils are arranged on the voice coil assembly, one above the other, and the magnet system comprises two pole pieces, one above the other, creating a pair of magnetized areas between said pole pieces and a yoke, such that a magnetic flux field is created between each pole piece and the yoke. In an alternative two concentric gaps are provided, where the voice coil assembly comprises two concentrically arranged sub-voice coils, where each sub-voice coil is provided with a distinct voice coil and the magnet assembly has two concentrically arranged magnet rings arranged with a yoke in the center, such that two concentric gaps are created, and that the voice coil assembly moves substantially orthogonal to the flux fields in the gap(s) and further that at least the part of each pole piece facing the gap(s) is made from a soft magnetic composite (SMC) material.

Acoustic transducer comprising a plurality of coaxially arranged diaphragms

An acoustic transducer includes a housing, a plurality of diaphragms suspended from the housing and separated into one or more groups, and one or more motors combined with the housing that operate in response to an electrical signal. The diaphragms of each group are driven by a respective motor to which all the diaphragms in the group are coupled and at least one motor has an indirect coupling with no direct mechanical connection to the diaphragms driven thereby. One or more electromagnetic motors that drive one or more sets of multiple diaphragms to provide acoustically efficient loudspeaker systems having dimensions that allow use in applications that would be difficult or impossible with traditional transducers.

TACTILE VIBRATION DRIVERS FOR USE IN AUDIO SYSTEMS, AND METHODS FOR OPERATING SAME

A tactile vibration driver for use in a headphone includes a support structure, at least one suspension member suspending at least one rigid member relative to the support structure, and a plurality of magnetic members attached to the at least one rigid member and configured to drive oscillating movement of the at least one rigid member and the at least one suspension member so as to produce tactile vibrations during operation of the tactile vibration driver. An audio system includes the tactile vibration driver. A method of operating an audio system includes driving a plurality of magnetic members attached to a rigid member of the tactile vibration driver to cause oscillations of the plurality of magnetic members and the rigid member relative to a suspension member and producing tactile vibrations responsive to receipt of an electrical signal. 1. A tactile vibration driver for use in a headphone , comprising:a support structure;at least one suspension member suspending at least one rigid member relative to the support structure; anda plurality of magnetic members attached to the at least one rigid member and configured to drive oscillating movement of the at least one rigid member and the at least one suspension member so as to produce tactile vibrations during operation of the tactile vibration driver.2. The tactile vibration driver of claim 1 , wherein each of the plurality of magnetic members is configured to be driven at the same frequency during operation of the tactile vibration driver.3. The tactile vibration driver of claim 1 , wherein at least one magnetic member of the plurality of magnetic members is attached to the at least one rigid member at a different plane than another magnetic member of the plurality of magnetic members.4. The tactile vibration driver of claim 1 , further comprising a housing for the tactile vibration driver that is separate and distinct from a housing of an audio driver of the headphone.5. The tactile vibration driver of claim 1 ...

Two-way loudspeaker with floating waveguide

One or more embodiments of the present disclosure relate to a two-way loudspeaker design that forces a condensed geometry between low frequency (LF) and high frequency (HF) drivers and then “floats” a midrange waveguide in front of the LF driver. This is a hybrid design meant to benefit from the close proximity of acoustic centers without introducing a central axis obstruction for the LF driver. In addition, the LF and HF waveguides and associated acoustic elements are used to redirect very low frequency energy not supported adequately by the LF waveguide to exit freely using other paths.

TRANSDUCER AND METHOD OF OPERATION

In one embodiment, there is described a new transducer, and in particular an improved system and method for producing linear motion for a transducer such as used in voice coils converting from an electrical input to a mechanical linear motion input. 1. A transducer , comprising:a circular magnetic channel having a longitudinal axis, including:an exterior magnetic cylinder positioned concentrically to the longitudinal axis and having a first plurality of magnetic poles at an interior face which are generally transverse to and pointing at the longitudinal axis and having a first plurality of magnetic flux forces such that each magnetic flux force travels between a first pole on an inward face of the exterior magnetic cylinder, around an open end of the magnetic cylinder, and back to a second pole of an exterior face of the exterior magnet cylinder;an interior magnetic cylinder positioned concentrically to the longitudinal axis and having a second plurality of magnetic poles at an exterior face which are generally transverse to and pointing away from the longitudinal axis and having a second plurality of magnetic flux forces such that each magnetic flux force travels between a first pole on an exterior face of the interior magnetic cylinder, around an open end of the interior magnetic cylinder, and back to a second pole of an inward face of the interior magnet cylinder;a base magnetic ring positioned at one longitudinal end of the exterior and interior magnetic cylinders to form the circular magnetic channel and having a third polarity of magnetic poles at an inward facing face which are generally parallel to the longitudinal axis and having a third plurality of magnetic flux forces such that each magnetic flux force travels between a first magnetic pole of an inward face, around the open end of the circular magnetic channel, and back toa second pole of an exterior face of the base magnetic ring;wherein the first plurality, second plurality, and third plurality of ...

Loudspeaker unit with multiple drive units

Loudspeaker unit with a membrane () and a plurality of drive units () driving the membrane (). Each of the plurality of drive units () has n voice coils () and at least n+1 magnets (), n being an integer larger than or equal to 1. The magnets () have an axial magnetization and are stacked in axial direction with similar pole parts of adjacent ones of the at least n+1 magnets facing each other. The at least n+1 magnets () are separated in the stack over a magnet separation distance (d), the magnet separation distance (d) being substantially equal to a width (w) in the stack direction of the at least n voice coils (). 112.-. (canceled)13. A loudspeaker unit having a membrane and a plurality of drive units driving the membrane ,wherein each of the plurality of drive units comprises n voice coils and at least n+1 magnets, n being an integer larger than or equal to 1,wherein the at least n+1 magnets are magnets with an axial magnetization which are stacked in axial direction with similar pole parts of adjacent ones of the at least n+1 magnets facing each other, and the at least n+1 magnets are separated in the stack over a magnet separation distance (dm), the magnet separation distance (dm) being substantially equal to a width (ws) in the stack direction of the n voice coils, andwherein the at least n+1 magnets are fixed at the magnet separation distance (dm) by a spacer, the spacer being of a non-magnetic material.14. The loudspeaker unit according to claim 13 , wherein the n voice coils are mechanically fixed to the membrane.156. The loudspeaker unit according to claim 13 , wherein the n voice coils are attached to a cylinder shaped support element ().16. The loudspeaker unit according to claim 13 , wherein the plurality of drive units are positioned in a parallel configuration.17. The loudspeaker unit according to claim 13 , wherein the n+1 magnets are neodymium magnets.18. The loudspeaker unit according to claim 13 , wherein the n+1 magnets are cylinder shaped ...

PLANAR LOUDSPEAKER MANIFOLD FOR IMPROVED SOUND DISPERSION

An acoustic manifold for altering a sound wavefront shape from a loudspeaker having a substantially planar driver, comprising a mounting surface configured to attach to a front surface of a case surrounding the driver and having two vertical openings matching corresponding vertical openings in the case to allow sound from the driver to project therethrough, and a waveguide portion coupled to the mounting surface and having a structure channeling sound projected from the driver through the two vertical openings to be combined in one output area. The structure has a plurality of reflective surfaces configured to create output sound that has a consistent dispersion pattern over a defined area. The manifold is configured to increase a vertical and/or horizontal beamwidth of the projected sound so that listeners positioned off an axis of the loudspeaker will hear a wide range of audible frequencies at a substantially similar sound level. 1. An apparatus for altering a sound wavefront shape from a loudspeaker having a substantially planar driver comprising:a mounting surface configured to attach to a front surface of a case surrounding the driver and having two vertical openings matching corresponding vertical openings in the case to allow sound from the driver to project therethrough; anda waveguide portion coupled to the mounting surface and having a structure channeling sound projected from the driver through the two vertical openings to be combined in one output area, wherein the structure has a plurality of reflective surfaces configured to create output sound that has a consistent dispersion pattern over a defined area.2. The apparatus of wherein the structure comprises two side walls within a manifold frame forming a single large vertical opening claim 1 , and a central pillar running vertically between the side walls to form the two entry columns and the one output area.3. The apparatus of wherein the reflective surfaces are formed from contours formed into the ...

Flat Plate Transducer

A flat plate audio transducer. A front panel and a back panel are connected via a frame. One or more electromagnetic actuators are mounted between the two panels. Voice coils are used as the actuators in some embodiments. Stiffening braces are preferably run between groups of actuators to prevent unwanted resonance phenomena. In some embodiments an actuator array moves both the front and back panels. In other embodiments only one panel is moved. The flat plate transducer is configured to mount on a room wall in a position that is conventionally used for decorative items such as artwork. 1. A sound transducer , comprising:(a) a front panel made of thin and stiff material, said front panel having a front panel perimeter;(b) a back panel made of thin and stiff material, said back panel having a back panel perimeter;(c) a frame joining said front panel perimeter to said back panel perimeter;(d) an actuator having a first side and a second side, said actuator being configured to respond to a first electrical current by urging said first side away from said second side and a second electrical current by urging said first side toward said second side;(e) said first side of said actuator being attached to said front panel; and(f) said second side of said actuator being attached to said back panel.2. The sound transducer as recited in claim 1 , further comprising a hanger.3. The sound transducer as recited in claim 2 , further comprising a standoff.4. The sound transducer as recited in claim 1 , further comprising a plurality of additional actuators claim 1 , wherein each of said plurality of actuators is attached to said front panel and said back panel.5. The sound transducer as recited in claim 4 , wherein said actuators are arranged in an evenly-spaced array.6. The sound transducer as recited in claim 1 , further comprising:(a) a front stiffening brace connected between said first side of said actuator and said front panel; and(b) a back stiffening brace connected between ...

Inverted dual coil transducer

A dual coil transducer is provided that has a low profile construction. The transducer includes a voice coil disposed around a central region of the transducer, a diaphragm with flexible suspension extending generally outwardly from the central region and including an inner edge attached to the voice coil, where the diaphragm includes a concave surface, and at least one magnet assembly disposed forward of the concave surface, where the at least one magnet assembly defines at least two magnetic gaps disposed about the central region. The transducer will usually be mounted with the motor outside of the loudspeaker enclosure for best heat dissipation.

SPEAKER

[Problem] To provide a speaker that is capable of emitting higher-volume and clearer sounds which hard-of-hearing individuals and hearing individuals can hear together without inconvenience by not suppressing vibration of the curved diaphragm and therefore efficiently transmitting kinetic energy converted from the electric energy of a sound signal to a curved diaphragm, and also has a reduced weight and size and is easy to manufacture. [Solution] A speaker of the present invention includes: a diaphragm curved in one direction; a driver unit that vibrates the diaphragm in accordance with an inputted electric signal; and a frame body supporting the diaphragm and the driver unit. One end side and another side of the diaphragm in the direction of curvature are attached to the frame body via edge parts that do not interfere with the vibration. Also, the driver unit is in contact with one surface of the diaphragm and fixedly attached to the frame body. 1. A speaker comprising at least:a diaphragm curved in one direction as extending from one end side to another end side;a driver unit that vibrates the diaphragm in accordance with an inputted electric signal; anda frame body holding the diaphragm and the driver unit,wherein(i) only the one end side and the other end side of the diaphragm are attached to the frame body via edge parts having such hardness and shape as not to impair vibration, or(ii) only the one end side and the other end side of the diaphragm are attached to the frame body via edge parts that elastically fix the one end side and the other end side, or(iii) the one end side and the other end side of the diaphragm are attached to the frame body via edge parts having such hardness and shape, as not to impair vibration, and a side end of the diaphragm extending along a direction of curvature has a clearance between the side end and the frame body, or(iv) the one end side and the other end side of the diaphragm are attached to the frame body via edge parts that ...

Loudspeaker with metallic organic framework material

A loudspeaker, comprising an enclosure; at least one dynamic driver mounted in the enclosure; and a porous sound adsorber material disposed within the enclosure, the sound adsorber material at least comprising a Metallic Organic Framework material.

METHOD FOR MANUFACTURING AIR PULSE GENERATING ELEMENT

A method for manufacturing an air pulse generating element is provided. First, a thin film layer including a membrane is provided, and then, a plurality of actuators are formed on the thin film layer. After that, a first chamber is formed between the thin film layer and a first plate and followed by patterning the thin film layer to form a plurality of valves, in which the membrane and the valves are formed of the thin film layer. Subsequently, a second chamber is formed between the thin film layer and a second plate, and a plurality of channels are formed in the first plate and the second plate. 1. A method for manufacturing an air pulse generating element , comprising:providing a thin film layer, wherein the thin film layer comprises a membrane;forming a plurality of actuators on the thin film layer;forming a first chamber between the thin film layer and a first plate;patterning the thin film layer to form a plurality of valves, wherein the membrane and the valves are formed of the thin film layer;forming a second chamber between the thin film layer and a second plate; andforming a plurality of channels in the first plate and the second plate.2. The method for manufacturing the air pulse generating element according to claim 1 , wherein forming the actuators comprises forming a plurality of first electrodes claim 1 , forming a plurality of deformable blocks and forming a plurality of second electrodes claim 1 , and the deformable blocks are formed by patterning a same deformable layer.3. The method for manufacturing the air pulse generating element according to claim 2 , wherein the deformable layer is deformed by a piezoelectric force claim 2 , an electrostatic force claim 2 , an electromagnetic force or an electrothermal force.4. The method for manufacturing the air pulse generating element according to claim 1 , wherein the deformable blocks electrically insulate the first electrodes from the second electrodes.5. The method for manufacturing the air pulse ...

Tablet Woofer

The present invention provides a tablet woofer, including: a vibration diaphragm, at least four mutually independent driving units, and a housing for accommodating and securing the vibration diaphragm and the driving unit. The driving unit includes independent voice coil units and magnetic circuit units, the voice coil units being attached and fixed to the vibration diaphragm. The woofer further includes a FPCB communicating with an internal circuit and an external circuit, and the FPCB is disposed at two sides of the housing, the part of the FPCB disposed on the side of the housing close to the voice coil units being electrically connected to the voice coil units, the part of the FPCB disposed on the side of the housing far away from the voice coil units being electrically connected to the external circuit. The woofer can solve the problems of thick and heavy voice coils and magnet performance surplus. 1. A tablet woofer , comprising:a vibration diaphragm,at least four mutually independent driving units, anda housing for accommodating and fixing the vibration diaphragm and the driving units;wherein,the driving units comprise independent voice coil units and magnetic circuit units corresponding to the voice coil units, and the voice coil units are attached and fixed to the vibration diaphragm respectively; andthe flat-plate bass loudspeaker further comprises a FPCB (Flexible Printed Circuit Board) for connecting internal circuits with external circuits of the woofer, wherein the FPCB is provided at both sides of the housing, wherein a part of the FPCB provided at a side of the housing close to the voice coil units is electrically connected with the voice coil units via leading wires of the voice coils, and a part of the FPCB provided at a side of the housing away from the voice coil units is electrically connected with the external circuits of the loudspeaker.2. The tablet woofer according to claim 1 , wherein claim 1 ,the vibration diaphragm is rectangular in shape ...

Flat plate-type bass loudspeaker

A flat plate bass loudspeaker comprising a flat plate diaphragm, at least three driving units and a housing. The driving unit comprises a voice coil unit and a magnetic circuit unit; the voice coil units are dispersedly coupled to one side of the diaphragm near the housing; mounting holes for accommodating and fixing the magnetic circuit units, and voice outlet holes penetrating through the housing are arranged on the housing; the number and position of the mounting holes are corresponding to those of voice coils attached to the spherical top of the diaphragm; and ratio of the total area of the voice outlet holes to the orthographic projection area of the diaphragm on the housing is in a range less than 0.9. The flat plate bass loudspeaker provided by the present invention can avoid the problems occurred in thick and heavy voice coils and excessive magnet performance.

Earbuds With Isobaric Chambers to Manipulate Bass Response

Multiple speakers and isobaric chambers are used to enhance sound quality in an earbud. The earbud has a housing with a sound outlet, a first and second isobaric chambers that are in communication with the outlet. Two sound drivers in the housing are positioned to emit sound waves into the isobaric chambers separately. A divider is used to guide sound waves by creating an elongated channel in the second isobaric chamber. An ear hook has a third isobaric chamber and a third sound driver positioned to emit sound wave into the third isobaric chamber. The third isobaric chamber is in communication with the outlet through the second isobaric chamber. 1. An earbud , comprising:a housing comprising a first isobaric chamber, a second isobaric chamber, and a sound outlet that is in communication with the first and second isobaric chamber;a first sound driver positioned to emit a first sound wave into the first isobaric chamber; anda second sound driver positioned to emit a second sound wave into the second isobaric chamber.2. The earbud of claim 1 , wherein the second isobaric chamber comprises a first portion and a second portion claim 1 , wherein the first portion is positioned closer to the second sound driver than the second portion.3. The earbud of claim 2 , wherein the housing comprises a divider that at least partially separates the first portion from the second portion.4. The earbud of claim 3 , wherein the second sound wave in the first portion of the second isobaric chamber travels away from the sound outlet.5. The earbud of claim 1 , wherein the first sound driver is configured to emit sound waves in a middle frequency range and a treble frequency range claim 1 , and the second sound driver is configured to emit sound waves in a bass frequency range.6. The earbud of claim 1 , wherein the second isobaric chamber is at least 4 times larger than the first isobaric chamber.7. The earbud of claim 1 , wherein the first sound driver does not comprise a magnet.8. The ...

Electroacoustic device and mobile terminal

An electroacoustic device and a mobile terminal are provided. The electroacoustic device may include a box defining an opening; an electroacoustic component including a frame, a vibrating membrane and a driving assembly, whet the frame is installed inside the box, the vibrating membrane is assembled on the thine and covers the opening, the frame and the vibrating membrane define a chamber, the driving assembly is configured to drive the vibrating membrane to vibrate, and the frame defines a leaking channel, and partition nets set inside the box, wherein a space between the electroacoustic component and the box is divided into cavities by the partition nets, at least one cavity is filled with sound absorption material, and the cavities are communicated with the chamber through the leaking channel. 1. An electroacoustic device , comprising:a box defining an opening; a frame installed inside the box and defining a leaking channel passing through the frame;', 'a vibrating membrane assembled on the frame and covering the opening, wherein the frame and the vibrating membrane cooperatively define a chamber communicated with the leaking channel; and', 'a driving assembly disposed in the chamber and configured to drive the vibrating membrane to vibrate; and, 'an electroacoustic component comprisinga plurality of partition nets set inside the box and outside the chamber, wherein a space between the frame and the box is divided into a plurality of cavities by the plurality of partition nets, at least one or the plurality of cavities is filled with sound absorption material, each of the plurality of partition nets defines a plurality of net holes, and the plurality of cavities are communicated with the chamber through the leaking channel.2. The electroacoustic device of claim 1 , whereinthe plurality of partition nets comprises a first partition net and at least one second partition net, the first partitions net is closer to the frame compared with the at least one second ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present invention relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present invention and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A vibration device in a bone conduction speaker , comprising:compound vibration parts, wherein at least part of the compound vibration parts is made of stainless steels; andthe compound vibration parts are configured to generate vibrations having two resonance peaks, frequencies of the two resonance peaks being catchable with human ears.2. The vibration device according to claim 1 , wherein the thickness of the compound vibration parts made of stainless steels is 0.1-0.2 mm.3. The vibration device according to claim 1 , wherein the compound vibration parts include two or more vibration parts.4. The vibration device according to claim 3 , wherein the two or more vibration parts at least partially attach to each other.5. The vibration device according to claim 3 , wherein the two or more vibration parts at least include a vibration conductive plate and a vibration board.6. The vibration device according to claim 5 , wherein at least part of the vibration conductive ...

Vertically and Horizontally Balanced Subwoofer

A speaker system, particularly useful as a subwoofer, comprises an enclosure with one acoustic transducer facing to the right and one acoustic transducer facing to the left, which effectively cancels out transducer cone mass induced vibration within the enclosure. The enclosure also has one passive radiator facing up and one passive radiator facing down. The passive radiator facing down effectively couples acoustic energy at very low frequencies into the floor. The passive radiators each have a rather a large area and high mass. The large, high mass, bottom mounted passive radiator will produce large amounts of enclosure vibration, and so to cancel this vibration, the upper passive radiator is of substantially the same mass and size. The resulting system will be vibrationally balanced on all axes while simultaneously effectively coupling low frequency energy onto the floor of the listening room with good efficiency. 1. A loudspeaker system for having a total mass , the loudspeaker system comprising:a first panel, the first panel defining a first opening, the first opening having a first area;a first opposite panel underneath the first panel and being substantially parallel to the first panel, the first opposite panel defining a first opposite opening, the first opposite opening having a first opposite area, the first area and the first opposite area providing a cumulative passive radiation area;a second panel extending between the first panel and the first opposite panel, the second panel defining a second opening, the second opening having a second area;a second opposite panel extending between the first panel and the first opposite panel, the second opposite panel being substantially parallel to the second panel and being substantially perpendicular to both the first panel and the first opposite panel, the second opposite panel defining a second opposite opening, the second opposite opening having a second opposite area, wherein the second area and the second ...

Dual function transducer

A dual function transducer assembly comprising: a magnet motor assembly comprising a first magnet plate and a second magnet plate arranged in parallel to one another along a first axis; a sound output assembly coupled to the magnet motor assembly, the sound output assembly comprising a piston and a voice coil, and wherein the voice coil is arranged to cause a vibration of the piston in a direction parallel to the first axis; and a shaker assembly coupled to the magnet motor assembly, the shaker assembly comprising a first shaker coil and a second shaker coil arranged to cause a vibration of the magnet assembly in a direction parallel to a second axis that is perpendicular to the first axis.

DUAL FUNCTION TRANSDUCER

A transducer assembly comprising: a magnet motor assembly comprising a first magnet plate and a second magnet plate arranged along an axis, a first support plate positioned between inward facing surfaces of the first magnet plate and the second magnet plate, a second support plate positioned along an outward facing surface of the first magnet plate to form a first magnetic gap between the first support plate and the second support plate, and a third support plate positioned along an outward facing surface of the second magnet plate to form a second magnetic gap between the first support plate and the third support plate; a voice coil coupled to the magnet motor assembly, wherein the voice coil is positioned around the first support plate and within the first magnetic gap and the second magnetic gap; and a piston coupled to the voice coil, wherein the piston is operable to vibrate in a direction parallel to the axis. 1. A transducer assembly comprising:a magnet motor assembly comprising a first magnet plate and a second magnet plate arranged along an axis, a first support plate positioned between inward facing surfaces of the first magnet plate and the second magnet plate, a second support plate positioned along an outward facing surface of the first magnet plate to form a first magnetic gap between the first support plate and the second support plate, and a third support plate positioned along an outward facing surface of the second magnet plate to form a second magnetic gap between the first support plate and the third support plate;a voice coil coupled to the magnet motor assembly, wherein the voice coil is positioned around the first support plate and within the first magnetic gap and the second magnetic gap; anda piston coupled to the voice coil, wherein the piston is operable to vibrate in a direction parallel to the axis.2. The transducer assembly of wherein the first support plate claim 1 , the second support plate and the third support plate extend beyond ...

Speaker unit for earphone and earphone including the same

A speaker unit for an earphone is provided. The speaker unit for an earphone includes a frame including a first hole in a front thereof and a second hole in a rear thereof; a yoke disposed on the frame and elongated along a front-to-rear direction; a first magnet disposed on one side of the yoke; a first plate disposed on one side of the first magnet; a first diaphragm disposed on one side of the first plate; a second magnet disposed on the other side of the yoke; a second plate disposed on the other side of the second magnet; and a second diaphragm disposed on the other side of the second plate, wherein the first magnet and the second magnet are together in contact with the yoke, and the yoke includes a first passage that connects the first hole and the second hole.

TRANSDUCER AND METHOD OF OPERATION

In one embodiment, there is described a new transducer, and in particular an improved system and method for producing linear motion for a transducer such as used in voice coils converting from an electrical input to a mechanical linear motion input. 1. A transducer , comprising:a circular magnetic channel having a longitudinal axis, including:an exterior magnetic cylinder positioned concentrically to the longitudinal axis and having a first plurality of magnetic poles at an interior face which are generally transverse to and pointing at the longitudinal axis and having a first plurality of magnetic flux forces such that each magnetic flux force travels between a first pole on an inward face of the exterior magnetic cylinder, around an open end of the magnetic cylinder, and back to a second pole of an exterior face of the exterior magnet cylinder;an interior magnetic cylinder positioned concentrically to the longitudinal axis and having a second plurality of magnetic poles at an exterior face which are generally transverse to and pointing away from the longitudinal axis and having a second plurality of magnetic flux forces such that each magnetic fluxforce travels between a first pole on an exterior face of the interior magnetic cylinder, around an open end of the interior magnetic cylinder, and back to a second pole of an inward face of the interior magnet cylinder;a base magnetic ring positioned at one longitudinal end of the exterior and interior magnetic cylinders to form the circular magnetic channel and having a third polarity of magnetic poles at an inward facing face which are generally parallel to the longitudinal axis and having a third plurality of magnetic flux forces such that each magnetic flux force travels between a first magnetic pole of an inward face, around the open end of the circular magnetic channel, and back toa second pole of an exterior face of the base magnetic ring;wherein the first plurality, second plurality, and third plurality of ...

Planar magnetic driver having trace-free radiating region

A planar magnetic driver including a radiating surface having a trace-free central region is described. The driver has a magnet defining an acoustic opening on a central axis. A diaphragm of the planar magnetic driver is held by mounts having a mounting profile around the central axis, and the diaphragm includes a radiating surface facing the acoustic opening. An innermost conductive trace on the diaphragm extends around a central region of the radiating surface within a magnetic flux of the magnet such that no conductive traces are on the central region. A radial distance between the innermost conductive trace and the mounting profile is less than another radial distance between the innermost conductive trace and the central axis. Accordingly, an excursion range of the diaphragm along the central axis is greater than a gap distance between the conductive trace and the magnet. Other aspects are also described and claimed.

High Output Impedance Audio Amplifier For Noise Rejection

A hearable has an audio amplifier circuit coupled to a speaker as a load. The amplifier circuit has current source drive, which attenuates electromagnetically coupled noise of the speaker. In other instances, the amplifier circuit has a first amplifier mode and a second amplifier mode, wherein in the first amplifier mode the amplifier circuit becomes configured to drive the speaker as a voltage source, and in the second amplifier mode the amplifier circuit becomes configured to drive the speaker as a current source. Control logic varies the amplifier circuit between i) the first amplifier mode for larger amplitudes of the audio signal, and ii) the second amplifier mode for smaller amplitudes of the audio signal. Other aspects are also described and claimed. 1. An audio amplifier comprising:an amplifier circuit to receive an audio signal and drive a speaker as a load, the amplifier circuit having a first amplifier mode and a second amplifier mode,wherein in the first amplifier mode the amplifier circuit becomes configured to drive the speaker as a voltage source,and in the second amplifier mode the amplifier circuit becomes configured to drive the speaker as a current source; andcontrol logic to vary the amplifier circuit between i) the first amplifier mode for larger amplitudes of the audio signal, and ii) the second amplifier mode for smaller amplitudes of the audio signal.2. The audio amplifier of claim 1 , wherein the amplifier circuit comprises a class D amplifier.3. The audio amplifier of claim 1 , wherein the second amplifier mode has higher output impedance than the first amplifier mode.4. The audio amplifier of claim 1 , wherein the amplifier circuit comprises an H bridge to be operated in the first amplifier mode and the second amplifier mode.5. The audio amplifier of claim 1 , wherein:the amplifier circuit comprises an H bridge; andthe control logic controls the H bridge in discontinuous operation in the second amplifier mode.6. The audio amplifier of ...

DOUBLE-VIBRATING-DIAPHRAGM LOUDSPEAKER MODULE

A double-diaphragm loudspeaker module comprises: a housing providing with a first sound hole and a second sound hole; a supporting structure fixed on an inner wall of the housing; and a loudspeaker unit comprising a first diaphragm, a sound coil, a magnetic circuit system and a second diaphragm. The sound coil and the magnetic circuit system are separately combined with the first diaphragm and the second diaphragm. The housing, the supporting structure and the loudspeaker unit form a first front sound cavity, a second front sound cavity, and a rear sound cavity. The first front sound cavity comprises a space between the first diaphragm and the housing. The second front sound cavity comprises a space between the second diaphragm and the housing. The rear sound cavity comprises a space between the first diaphragm and the second diaphragm. 1. A double-vibrating-diaphragm loudspeaker module comprising:a peripheral housing provided with a first sound hole and a second sound hole;a supporting member fixed on an inner surface of the peripheral housing; anda loudspeaker unit comprising a first vibrating diaphragm, a voice coil, a magnetic circuit system and a second vibrating diaphragm,wherein, the voice coil is coupled with the first vibrating diaphragm, the magnetic circuit system is coupled with the second vibrating diaphragm, the voice coil is accommodated in a magnetic gap of the magnetic circuit system, and edges of the first vibrating diaphragm and the second vibrating diaphragm are fixed on the supporting member,wherein, the peripheral housing, the supporting member and the loudspeaker unit define a first front acoustic cavity, a second front acoustic cavity, and a rear acoustic cavity; the first front acoustic cavity comprises a space between the first vibrating diaphragm and a part of the peripheral housing closing to the first vibrating diaphragm, and communicates with outside via the first sound hole of the peripheral housing; the second front acoustic cavity ...

AIR PULSE GENERATING ELEMENT AND MANUFACTURING METHOD THEREOF

An air pulse generating element is disclosed. The air pulse generating element includes a front faceplate; a back faceplate; a front supporting element; a back supporting element; a folded membrane, configured to form a front chamber and a back chamber, and comprising a plurality of membrane units; wherein the plurality of membrane units are parallel and sequentially connected and an end of the folded membrane is connected to the back faceplate via the back supporting element and another end of the folded membrane is connected to the front faceplate via the front supporting element; and a plurality of valves controlling a plurality of air flow channels between the front chamber toward either a front space or a back space; wherein the plurality of membrane units are configured to perform horizontal deformation to squeeze air in and out of the front or back chamber with operations of the plurality of valves. 1. An air pulse generating element , comprising:a front faceplate;a back faceplate;a folded membrane, configured to form a front chamber and a back chamber, and comprising a plurality of membrane units; wherein the plurality of membrane units are parallel and sequentially connected and an end of the folded membrane is connected to the back faceplate and another end of the folded membrane is connected to the front faceplate; anda plurality of valves controlling a plurality of air flow channels between the front chamber toward either a front space or a back space, and between the back chamber toward either the front space or the back space;wherein the plurality of membrane units are configured to perform horizontal deformation to squeeze air in and out of the front or back chamber with operations of the plurality of valves controlling the direction of an air pulse toward the front space or the back space.2. The air pulse generating element of claim 1 , further comprising a plurality of actuators claim 1 , each formed on a side of a membrane unit of the plurality of ...

Loudspeaker Driver/Exciter with Unique Design to Facilitate Mounting

A loudspeaker driver/exciter assembly for use with any flat or slightly contoured surface panel. The invention is composed of a driver assembly, a frame, and a voice coil exciter assembly. The driver assembly includes magnet, core cap, and shell pot. The voice coil exciter assembly includes a former, coil and exciter assembly. A spider suspends the voice coil exciter assembly below the driver assembly. The invention is mounted to the panel by one or more interfaces between the frame and the panel and one or more interfaces between the exciter and the panel. One or more holes or cutouts are provided in the shell pot, core cap, and magnet, and aligned with the screws or fasteners of the voice coil exciter assembly in such a way that a tool such as a screwdriver may be used to facilitate quick and easy mounting and removal of the driver/exciter assembly with the panel. 1. An loudspeaker driver/exciter assembly that can be uniquely coupled to the surface of a panel , the loudspeaker driver/exciter assembly consisting of:a. A support frame, a driver assembly and a voice coil exciter assembly.b. The driver assembly consists of a shell pot, magnet and core cap.c. The voice coil exciter assembly consists of a former, coil, exciter pad and attachment hardware.d. A spider which suspends and centers the voice coil exciter assembly in relation to the driver assembly.2. The driver assembly of which is comprised of a shell pot claim 1 , magnet and core cap that all have a centralized access hole in their construction and assembly.3. The voice coil exciter assembly of which is comprised of a coil former claim 1 , coil copper windings claim 1 , and exciter pad and retained attachment hardware.4. The exciter pad of which has a centralized access hole in its construction to allow retained assembly of attachment hardware.5. The coupling of the loudspeaker driver/exciter assembly to a panel is accomplished at both the support frame legs and the exciter pad of the voice coil exciter ...

WOOFER SPEAKER AND THE REAR SOUND CAVITY FORMING METHOD THEREOF

A woofer speaker is provided, comprising a woofer speaker unit, a first sealing pad, a second sealing pad and a housing. The first sealing pad is fixed closely with the outer edge of the housing; the woofer speaker unit is fixed and sealed within the housing by the first sealing pad, and the second sealing pad is located between the woofer speaker unit and the housing; a sound hole is provided on the housing, and the shape and size of the sound hole correspond to those of the woofer speaker; and the terminal installation plane is the rear cover of the woofer speaker, and together with the housing forms the rear sound cavity of the woofer speaker through the first sealing pad. The cavity of the woofer speaker provided by the invention and the installation terminal applying the woofer speaker resolve the rear cover vibration problem of ultra-thin woofer speakers. 1. A woofer speaker , comprising a woofer speaker unit , a first sealing pad , a second sealing pad and a housing , wherein ,the first sealing pad is hermetically coupled to outer edge of the housing;the woofer speaker unit is fixed and sealed within the housing by the first sealing pad, and the second sealing pad is located between the woofer speaker unit and the housing;a sound hole is provided on the housing at a position where the woofer speaker is fixed, and the sound hole has a shape and a size corresponding to those of the woofer speaker; anda terminal installation plane on which the woofer speaker is fixed and mounted is a rear cover of the woofer speaker, and the terminal installation plane together with the housing defines a rear acoustic cavity of the woofer speaker through the first sealing pad.2. The woofer speaker of claim 1 , wherein claim 1 ,the housing is fixedly connected with the terminal installation plane by screws or supporting members.3. The woofer speaker of claim 2 , wherein claim 2 ,the supporting members are provided at the two sides of the sound hole on the housing.4. The woofer ...

Tablet Woofer and Electronic Device Using Same

A tablet woofer and an electronic device using same. The woofer comprises a vibrating diaphragm, at least four mutually independent drive units, and a housing. The vibrating diaphragm is a rectangle shape, and comprises a rigid arc portion at the central position and a spiral curve portion at the periphery; the drive unit comprises a voice coil unit and a corresponding magnetic circuit unit, and four angles of the arc portion of the vibrating diaphragm are each combined with one voice coil unit; the housing is provided with mounting holes for accommodating and mounting the drive units, and sound holes penetrating through the mounting plane; the spiral curve portion of the vibrating diaphragm is fixedly connected to the periphery of the upper side of the housing. 1. A tablet woofer comprising a vibrating diaphragm , at least four driving units independent of each other and a housing , wherein ,the vibrating diaphragm has a rectangular shape comprising a rigid dome portion at the central position and a suspension ring portion at the edge position;the driving units comprise voice coil units and magnetic circuit units corresponding to the voice coil units;four voice coil units are bonded to four corners of the dome portion of the vibrating diaphragm respectively;mounting holes which accommodate and mount the driving units, and sound holes penetrating through a mounting plane are arranged on the housing; andthe suspension ring portion of the vibrating diaphragm is fixed and coupled to a peripheral region of an upper lateral surface of the housing.2. The tablet woofer according to claim 1 , wherein:the housing comprises a mounting plane and an annular side wall provided around the mounting plane, and mounting holes accommodating and mounting the driving units and sound holes penetrating through the mounting plane are arranged on the mounting plane; andan upper side surface of the annular side wall is fixedly connected with the suspension ring portion of the vibrating ...

LONG STROKE SPEAKER

A long stroke speaker is provided in the present disclosure. The long stroke speaker includes a shell having a receiving space, a first vibration system and a second vibration system connected with the shell respectively, and at least one magnetic circuit system. The receiving space comprises a first acoustic cavity and a second acoustic cavity communicated with each other. The magnetic circuit system(s) is(are) disposed in the first acoustic cavity and/or the second acoustic cavity. The vibration direction of the first vibration system intersects with the vibration direction of the second vibration system. 1. A long stroke speaker , comprising a shell having a receiving space a first vibration system and a second vibration system connected with the shell respectively; and at least one magnetic circuit system; wherein the receiving space comprises a first acoustic cavity and a second acoustic cavity communicated with each other; the magnetic circuit system(s) is(are) disposed in the first acoustic cavity and/or the second acoustic cavity; the vibration direction of the first vibration system intersects with the vibration direction of the second vibration system.2. The long stroke speaker of claim 1 , wherein the vibration direction of the first vibration system intersects with the vibration direction of the second vibration system perpendicularly.313. The long stroke speaker of claim 1 , wherein the shell comprises a first side wall claim 1 , a second side wall opposite to the first side wall claim 1 , and several third side walls connected with the first side wall and the second side wall claim 1 , wherein the first side wall claim 1 , the second side wall and the third side walls enclose a receiving space together; the third side walls is provided with a first receiving portion for receiving the first vibration system claim 1 , the first side wall or the second side wall is provided with a second receiving portion for receiving the second vibration system .4. The ...

SPEAKER APPARATUS

A speaker apparatus according to an embodiment includes a first panel, a second panel, vibration elements, and a drive unit. The vibration elements are respectively provided to the first and second panels to vibrate the first and second panels. The drive unit applies a drive signal to the vibration elements so as to respectively form vibration regions in the first and second panels. The drive signal is obtained by modulating a carrier wave in an ultrasonic band by using a sound signal in an audible frequency band. The first and second panels are arranged so that an angle between surface directions of the first and second panels is a predetermined angle. 1. A speaker apparatus comprising:a first panel and a second panel;vibration elements that are respectively provided to the first and second panels to vibrate the first and second panels; anda drive unit that applies a drive signal to the vibration elements so as to respectively form vibration regions an the first and second panels, the drive signal being obtained by modulating a carrier wave in an ultrasonic band by using a sound signal in an audible frequency band, whereinthe first and second panels are arranged so that an angle between surface directions of the first and second panels is a predetermined angle.2. The speaker apparatus according to claim 1 , whereinthe second panel is arranged along a direction intersecting with the first panel at the predetermined angle that is set so as to bring an advancing direction of a first ultrasonic wave and that of a second ultrasonic wave close to each other, the first ultrasonic wave being generated from the vibration region of the first panel and reflected from the second panel, and the second ultrasonic wave being generated from the vibration region of the second panel and reflected from the first panel.3. The speaker apparatus according to claim 1 , whereinthe predetermined angle is substantially 90 degrees.4. The speaker apparatus according to claim 2 , whereinthe ...

Loudspeaker

Sound emanating from the high-frequency diaphragm of a coaxial speaker will diffract into the annular gap between the tweeter unit and the midrange cone. This results in response irregularities. We therefore disclose a loudspeaker, comprising first and second drivers located substantially coaxially with the first driver located centrally and the second driver located concentrically around the first driver, the loudspeaker being bounded at its radially outer side for at least part of its extent by the voice coil former of the second driver and including a spacing between the outermost extent of the first driver and the innermost extent of the second driver thus defining an annular space, the annular space containing a sound-absorbent material. By placing the sound-absorbing material in the annular space, the resonances within this space are damped, thus alleviating their effect. The annular space can have a lower resonant frequency that is below the passband of the first driver. Essentially, instead of minimising the effect of the annular gap by reducing its size and seeking to seal its outer opening, we propose to enlarge the space so that the fundamental resonant frequency it exhibits drops out of the passband of the high-frequency driver and hence out of the frequency range of interest. This both prevents the fundamental frequency of the cavity from being excited, and also allows sufficient room within the space to accommodate a sound-absorbent material to absorb these undesirable resonances. 1. A loudspeaker , comprising first and second drivers located substantially coaxially with the first driver located centrally and the second driver located around the first driver , the loudspeaker including a spacing between the outermost extent of the first driver and the innermost extent of the second driver thus defining an axially-extending space , the space being bounded at its radially outer side for at least part of its axial extent by the voice coil former of the ...

LOUDSPEAKER WITH FORCE CANCELLING CONFIGURATION

The present invention provides a loudspeaker with at least two diaphragm assemblies, in which the reactive forces acting on the magnets in each assembly cancel. By linking the two magnets together via a non-rigid material, resonance in the drive assemblies is highly damped and corresponding distortion of the loudspeaker output is reduced. 1. A loudspeaker , comprising:a first diaphragm and a respective first drive assembly, the first drive assembly comprising at least a first magnet;a second diaphragm and a respective second drive assembly, the second drive assembly comprising at least a second magnet; anda coupling member connecting the first magnet to the second magnet, said coupling member comprising a non-rigid material arranged such that forces are conveyed from the first magnet to the second magnet and vice versa, but that vibrations in the coupling member are damped.2. The loudspeaker according to claim 1 , wherein the first and second drive assemblies and the coupling member have dimensions so as to result in resonance at a resonant frequency.35. The loudspeaker according to claim 2 , wherein the addition of the coupling member results in a system Q factor of less than at said resonant frequency.4. The loudspeaker according to claim 3 , wherein the addition of the coupling member results in a system Q factor of less than 0.5 at said resonant frequency.5. The loudspeaker according to claim 1 , wherein the non-rigid material is a viscous material.6. The loudspeaker according to claim 5 , wherein the viscous material is retained in its position by a visco-elastic member.7. The loudspeaker according to claim 1 , wherein the non-rigid material is a visco-elastic material.8. The loudspeaker according to claim 1 , wherein the non-rigid material is adhesive.10. The loudspeaker according to claim 1 , wherein the non-rigid material comprises Blu Tack (®) claim 1 , mastic claim 1 , putty or butyl mastic.11. The loudspeaker according to claim 1 , wherein the non-rigid ...

Speaker-element and speaker comprising such a speaker-element

The invention relates to a speaker-element for a speaker, comprising two substantially mutually opposing spaced apart membrane planes, wherein each membrane plane comprises at least one electromagnetic wire arranged for creating a magnetic field upon an electric current passing through said electromagnetic wire, wherein at least one permanent magnet is arranged between the two membrane planes, wherein the electromagnet wires of the two membrane planes are connectable to an electric power source in such a manner, that the electric current passes there trough in substantially mutually opposing directions and thereby creating substantially mutually opposing magnetic fields, such that upon passing an electric current through the electromagnetic wire of each membrane plane said membrane planes are both either attracted towards or repulsed from the permanent magnet and thereby moved towards or away from each other, respectively, thereby producing a sound wave.

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present invention relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present invention and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A vibration device in a bone conduction speaker , comprising a vibration conductive plate and a vibration board , whereinthe vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being in a range of 80 Hz-18000 Hz, and sounds are generated by the vibrations transferred through a human bone.2. The vibration device according to claim 1 , wherein the vibration conductive plate includes a first torus and at least two first rods claim 1 , the at least two first rods converging to a center of the first torus.3. The vibration device according to claim 2 , wherein the vibration board includes a second torus and at least two second rods claim 2 , the at least two second rods converging to a center of the second torus.4. The vibration device according to claim 3 , wherein the first torus is ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present invention relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present invention and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A vibration device in a bone conduction speaker , comprising a vibration conductive plate and a vibration board , whereinthe vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks which are among the frequencies catchable with human ears, a difference between frequencies of the at least two resonance peaks is no less than 200 Hz, and sounds are generated by the vibrations transferred through a human bone.2. The vibration device according to claim 1 , wherein the vibration conductive plate includes a first torus and at least two first rods claim 1 , the at least two first rods converging to a center of the first torus.3. The vibration device according to claim 2 , wherein the vibration board includes a second torus and at least two second rods claim 2 , the at least two second rods converging to a center of the second torus.4. The ...

Bone conduction speaker and compound vibration device thereof

The present invention relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present invention and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.

COAXIAL COMPRESSION DRIVER

A coaxial compression driver including a housing, a first vibrating membrane for lower frequencies housed in the housing and facing a first compression chamber in communication with a first acoustic conduit, a second vibrating membrane for higher frequencies housed in the housing and facing a second compression chamber in communication with a second acoustic conduit, and a passive acoustic low pass filter housed in the first acoustic conduit, where the first and second vibrating membranes are arranged in the housing coaxial with respect to each other, where the first and second acoustic conduits converge into a common output acoustic conduit, and where the passive low pass filter is a lumped parameters filter which prevents frequencies above a predetermined cutoff frequency from passing from the second to the first acoustic conduit and allows frequencies below the predetermined cutoff frequency to pass from the first to the common output acoustic conduit. 116.-. (canceled)17. A coaxial compression driver comprising:a housing;a first vibrating membrane for relatively lower frequencies housed in the housing, wherein the first vibrating membrane faces a first compression chamber in communication with a first acoustic conduit;a second vibrating membrane for relatively higher frequencies housed in the housing, wherein the second vibrating membrane faces a second compression chamber in communication with a second acoustic conduit; anda passive acoustic low pass filter at least partially housed in the first acoustic conduit;wherein the first vibrating membrane and the second vibrating membrane are arranged in the housing coaxial or substantially coaxial with respect to each other;wherein the first acoustic conduit and the second acoustic conduit converge into a common output acoustic conduit;wherein the passive low pass filter is a lumped parameters filter designed and configured to substantially prevent frequencies above a predetermined cutoff frequency from passing from ...

Air Pulse Generating Element and Sound Producing Device

An air pulse generating element, disposed in a sound producing device, includes a membrane, disposed within a chamber; and a plurality of valves, disposed by the membrane within the chamber, configured to seal a plurality of openings of the chamber in response to a plurality of valve control signals; wherein the membrane and the plurality of valves are all fabricated at a first layer. 1. An air pulse generating element , disposed in a sound producing device , comprising:a membrane, disposed within a chamber; anda plurality of valves, disposed by the membrane within the chamber, configured to seal a plurality of openings of the chamber in response to a plurality of valve control signals;wherein the membrane and the plurality of valves are all fabricated at a first layer.2. The air pulse generating element of claim 1 , comprising:a first valve, configured to seal a first opening of the chamber in response to a first valve control signal, wherein the first opening is formed on a first faceplate of the air pulse generating element, and the first faceplate is disposed at a second layer;a second valve, configured to seal a second opening of the chamber in response to a second valve control signal, wherein the second opening is formed on a second faceplate of the air pulse generating element, and the second faceplate is disposed at a third layer;a third valve, configured to seal a third opening of the chamber in response to a third valve control signal, wherein the third opening is formed on the first faceplate; anda fourth valve, configured to seal a fourth opening of the chamber in response to a fourth valve control signal, wherein the fourth opening is formed on the second faceplate of the air pulse generating element.3. The air pulse generating element of claim 2 , whereinthe first valve is disposed by a first side of the membrane;the second valve is disposed by a second side of the membrane;the third valve is disposed by a third side of the membrane; andthe fourth ...

Differential speaker apparatus having motion feedback function

The present invention relates to a speaker apparatus for reproducing a sound from an electrical signal and, more specifically, to a voice coil speaker apparatus capable of reproducing a high-fidelity sound over a wide frequency band.

Coaxial compression driver

A coaxial compression driver including a housing, a first vibrating membrane for relatively lower frequencies housed in the housing where the first vibrating membrane faces a first compression chamber in communication with a first acoustic conduit, a second vibrating membrane for relatively higher frequencies housed in the housing, wherein the second vibrating membrane faces a second compression chamber in communication with a second acoustic conduit the first vibrating membrane and the second vibrating membrane arranged in the housing being coaxial or substantially coaxial with respect to each other, the first acoustic conduit and the second acoustic conduit converge into a common output acoustic conduit, and the coaxial compression driver includes a passive low pass filter at least partially housed in the first acoustic conduit.

Loudspeaker system with passive radiator

A loudspeaker system is provided in which a passive radiator and a driver are connected to one another within a speaker enclosure by an acoustic coupler having a coupler opening such that the driver and the passive radiator are located in different planes.

SPEAKER DEVICE

Provided is a speaker device configured so that a time lag between a sound signal and a noise cancellation signal can be prevented, worsening of high-frequency characteristics can be avoided, and acoustic characteristics can be improved. A plane diaphragm includes a flexible circuit board . A sound voice coil pattern to which drive current corresponding to a sound signal is supplied and a noise cancellation voice coil pattern to which drive current corresponding to a noise cancellation signal is supplied are formed on the flexible circuit board and are formed corresponding to a formed magnetic field of a magnet 1: A speaker device comprising:a plane diaphragm, a sound voice coil pattern to which drive current corresponding to a sound signal is supplied, and', 'a noise cancellation voice coil pattern to which drive current corresponding to a noise cancellation signal is supplied, and, 'wherein the plane diaphragm includes'}wherein the sound voice coil pattern and the noise cancellation voice coil pattern are formed corresponding to a formed magnetic field of a magnet.2: The speaker device according to claim 1 , whereinthe plane diaphragm is configured such that the sound voice coil pattern and the noise cancellation voice coil pattern are formed on a flexible circuit board.3: The speaker device according to claim 1 , whereinthe noise cancellation voice coil pattern is formed on one side of the sound voice coil pattern.4: The speaker device according to claim 1 , whereinthe noise cancellation voice coil pattern is formed on each side of the sound voice coil pattern.5: The speaker device according to claim 1 , whereinthe noise cancellation voice coil pattern includes a plurality of noise cancellation voice coil patterns, and end portions of the noise cancellation voice coil patterns are electrically connected together to form a single noise cancellation voice coil pattern.6: The speaker device according to claim 1 , whereina resistor element is connected to a middle ...

PLANAR MAGNETIC DRIVER HAVING TRACE-FREE RADIANT REGION

A planar magnetic driver including a radiating surface having a trace-free central region is described. The driver has a magnet defining an acoustic opening on a central axis. A diaphragm of the planar magnetic driver is held by mounts having a mounting profile around the central axis, and the diaphragm includes a radiating surface facing the acoustic opening. An innermost conductive trace on the diaphragm extends around a central region of the radiating surface within a magnetic flux of the magnet such that no conductive traces are on the central region. A radial distance between the innermost conductive trace and the mounting profile is less than another radial distance between the innermost conductive trace and the central axis. Accordingly, an excursion range of the diaphragm along the central axis is greater than a gap distance between the conductive trace and the magnet. Other aspects are also described and claimed. 1. A planar magnetic driver , comprising:one or more mounts having a mounting profile extending around a central axis;a magnet having an inner dimension defining an acoustic opening radially inward from the mounting profile;a diaphragm mounted on the one or more mounts and extending across the acoustic opening, wherein the diaphragm has a first mode of vibration including only a first node at the mounting profile, and wherein the diaphragm has a second mode of vibration including the first node at the mounting profile and a second node between the central axis and the inner dimension of the magnet; anda plurality of conductive traces on the diaphragm within a magnetic flux of the magnet.2. The planar magnetic driver of claim 1 , wherein the diaphragm has a single wave in the first mode of vibration claim 1 , and wherein the diaphragm has a plurality of waves in the second mode of vibration.3. The planar magnetic driver of further comprising a resting plane extending through the mounting profile orthogonal to the central axis claim 1 , wherein the ...

Headphone Acoustic Transformer

An acoustic transformer for use in a headphone to enhance an auditory experience of a listener, includes a disc or plate with acoustic apertures or aperture regions that is located in front of an acoustic driver in an ear cup of the headphone. In an example configuration, one side or area of the acoustic transformer includes multiple, smaller apertures and an opposite side or area of the acoustic transformer includes a lesser number of larger apertures, or a single larger aperture. When the headphone is over the listener's ear the acoustic transformer is juxtaposed between the acoustic driver and the listener, and in an example configuration the smaller apertures are located toward the front of the listener's ear, and the larger aperture is located toward the back of the listener's ear. 1. A headphone , comprising:an ear cup;an acoustic transformer;a driver between an inner surface of the ear cup and the acoustic transformer, wherein the acoustic transformer comprises at least two apertures in a first region of the acoustic transformer, and a single aperture in a second region of the acoustic transformer opposite the first region, the single aperture in the second region having greater area than a combined area of the at least two apertures in the first region;wherein the first and second regions form opposite halves of the acoustic transformer;wherein the first region does not contain any apertures larger than a largest of the at least two apertures in the first region; andwherein the headphone does not include multiple drivers that are coaxially arranged.2. The headphone of claim 1 , wherein the apertures in the first region are adapted to pass higher frequencies than the single aperture in the second region.3. The headphone of claim 1 , wherein a boundary of the single aperture closest to a center of the acoustic transformer includes regular indentations.4. The headphone of claim 1 , wherein the ear cup is configured to fit in an orientation with respect to a ...

LOUDSPEAKER DRIVER WITH DUAL ELECTROMAGNET ASSEMBLIES AND LOUDSPEAKER SYSTEM

Loudspeaker drivers are provided. According to one embodiment, a loudspeaker driver comprises a diaphragm, a connection tube, first and second voice coils, and first and second magnet assemblies. The connection tube has a first end section, a second end section, and a middle section. The first voice coil is connected to and surrounds at least a portion of the first end section. The second voice coil is connected to and surrounds at least a portion of the second end section. The first magnet assembly is configured to suspend the first voice coil in a first magnetic field and the second magnet assembly is configured to suspend the second voice coil in a second magnetic field. The connection tube intersects the diaphragm and the middle section of the connection tube is connected to the diaphragm. 1. A loudspeaker driver comprising:an acoustical diaphragm;a connection tube having a first section near a first end of the connection tube, a second section near a second end of the connection tube, and a middle section between the first section and second section;a first voice coil connected to and surrounding at least a portion of the first section of the connection tube, the first voice coil having a first audio lead and a second audio lead;a second voice coil connected to and surrounding at least a portion of the second section of the connection tube, the second voice coil having a first audio lead and a second audio lead;a first magnet assembly configured to suspend the first voice coil in a first magnetic field; anda second magnet assembly configured to suspend the second voice coil in a second magnetic field;wherein the connection tube intersects the acoustical diaphragm and the middle section of the connection tube is connected to the acoustical diaphragm.2. The loudspeaker driver of claim 1 , wherein the first magnet assembly comprises a first permanent magnet and the second magnet assembly comprises a second permanent magnet.3. The loudspeaker driver of claim 2 , ...

Flat Plate Transducer

A flat plate audio transducer. A front panel and a back panel are connected via a frame. One or more electromagnetic actuators are mounted between the two panels. Voice coils are used as the actuators in some embodiments. Stiffening braces are preferably run between groups of actuators to prevent unwanted resonance phenomena. In some embodiments an actuator array moves both the front and back panels. In other embodiments only one panel is moved. 1. A sound transducer , comprising:(a) a front panel made of thin material, said front panel having a front panel perimeter;(b) a back panel made of thin material, said back panel having a back panel perimeter;(c) a frame joining said front panel perimeter to said back panel perimeter;(d) an actuator having a first side and a second side, said actuator being configured to respond to a first electrical current by urging said first side away from said second side and a second electrical current by urging said first side toward said second side;(e) said first side of said actuator being attached to said front panel;(f) said second side of said actuator being attached to said back panel; and(g) a plurality of openings passing through said front panel.2. The sound transducer as recited in claim 1 , further comprising:(a) a sensor configured to detect incoming sound; and(b) a driving system configured to drive said sound transducer out of phase with said incoming sound.3. The sound transducer as recited in claim 1 , further comprising a base configured to allow said sound transducer to stand on a floor.4. The sound transducer as recited in claim 1 , further comprising a plurality of additional actuators claim 1 , wherein each of said plurality of actuators is attached to said front panel and said back panel.5. The sound transducer as recited in claim 1 , further comprising:(a) a perimeter void proximate said frame; and(b) wherein a portion of said plurality of openings pass into said perimeter void.6. The sound transducer as ...

LOUDSPEAKER

Loudspeaker () comprising:—a container () provided with a front opening () delimited by at least two opposite edges () of the container ();—at least a first and a second speaker () housed in the container ();—a mounting panel () to which are fixed the first and the second speaker; characterised in that:—the container () comprises two front walls () disposed on opposite sides respect to the front opening (), wherein the front walls () define an acoustic waveguide diverging between an inlet throat and an outlet mouth and wherein the front opening of the container () is the inlet throat of the diverging acoustic waveguide;—the diverging acoustic waveguide is a guide common to the first and second speaker; characterised in that:—the first speaker () is, or comprises, a woofer or a midwoofer;—the second speaker () is, or comprises, a dome tweeter or a compression driver. 2. The loudspeaker according to claim 1 , wherein the front walls are two curved walls.3. The loudspeaker according to claim 2 , wherein the front walls are convex towards the outside of the container and are concave towards the inside of the container.4. The loudspeaker according to claim 1 , wherein the container comprises a fixing guide having a guide axis and the mounting panel is a slide slidably received in the fixing guide to close the front opening.5. The loudspeaker according to claim 4 , wherein the fixing guide comprises two opposite fixing channels parallel to the guide axis and wherein two opposite portions of the mounting panel are each inserted in a respective fixing channel.6. The loudspeaker according to claim 4 , wherein:the container comprises a central body, hollow at least in part, and two side walls disposed on opposite sides with respect to the central body;at least one of the side walls comprises an opening transverse to the guide axis; andthe assembly made up by the mounting panel and by said speakers is removable through said transverse opening by sliding the mounting panel with ...

SPEAKER AND VIBRATION CONTROL UNIT

A speaker includes a first vibrator, a first driving unit, a second vibrator, a second driving unit and a supporting unit. The first vibrator is connected to a diaphragm, which vibrates, thereby emitting sound. The first driving unit vibrates the first vibrator, thereby vibrating the diaphragm. The second vibrator is connected to a weight member. The second driving unit is connected to the opposite side of the first driving unit to the first vibrator, and vibrates the second vibrator on the same vibration axis as the vibration axis of the first vibrator, thereby vibrating the weight member. The supporting unit supports a coupled body, configured by joining the second vibrator and the weight member, at two or more portions in the direction of the vibration axis. 1. A speaker comprising:a first vibrator that is connected to a diaphragm which vibrates to emit sound;a first driving unit that reciprocally vibrates the first vibrator to vibrate the diaphragm;a second vibrator that is connected to a weight member;a second driving unit that is connected to a side of the first driving unit opposite to a side on which the first vibrator is provided, and reciprocally vibrates the second vibrator on a same vibration axis as a vibration axis of the first vibrator to vibrate the weight member; anda supporting unit that supports a coupled body, configured by joining the second vibrator and the weight member, at two or more portions in the direction of the vibration axis.2. The speaker according to claim 1 , wherein: a second magnet that is disposed so as to face the first magnet; and', 'a contactless supplying portion that supports the coupled body in a floating state by a repulsive force between the first magnet and the second magnet., 'the coupled body includes a first magnet provided on a circumferential side of the coupled body, the supporting unit includes3. The speaker according to claim 2 , wherein:the weight member includes a cylindrical housing having a base end portion ...

MEMS SOUND TRANSDUCER

A MEMS sound transducer includes a substrate, a membrane formed within the substrate, and a bending actuator applied onto the membrane. The membrane includes at least one integrated permanent magnet and is electrodynamically controllable. The bending actuator can be piezoelectrically controlled separately from the membrane. 1. Sound transducer comprising:a substrate;a membrane which is formed within the substrate, is connected to at least one integrated permanent magnet and is electrodynamically controllable; anda bending actuator which is applied onto the membrane and can be piezoelectrically controlled separately from the membrane.2. Sound transducer as claimed in claim 1 , wherein the bending actuator comprises a membrane divided by a gap.3. Sound transducer as claimed in claim 2 , wherein the membrane divided by the gap comprises two halves; orwherein the membrane divided by the gap comprises four quadrants or a multitude of elements.4. Sound transducer as claimed in claim 2 , wherein the gap is smaller than 5 μm claim 2 , smaller than 25 μm claim 2 , smaller than 50 μm claim 2 , or smaller than 100 μm in a non-deflected state of the bending actuator.5. Sound transducer as claimed in claim 1 , wherein the bending actuator comprises an additional membrane driven by the bending actuator; orwherein the bending actuator comprises an additional membrane driven by the bending actuator and connected to the substrate via a flexible region of the additional membrane.6. Sound transducer as claimed in claim 1 , wherein the membrane is connected to a frame that is electrodynamically controlled along with the membrane; andwherein the membrane is connected to a frame which has the at least one permanent magnet integrated therein, the frame being electrodynamically controlled along with the membrane.7. Sound transducer as claimed in claim 1 , wherein the membrane or a frame of the membrane is spring-mounted in relation to the substrate.8. Sound transducer as claimed in claim 7 ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A bone conduction speaker , comprising: 'the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone; and', 'a vibration device comprising a vibration conductive plate and a vibration board, wherein'}at least two microphones, the at least two microphones including a first microphone with a first orientation and a second microphone with a second orientation different from the first orientation.2. The bone conduction speaker according to claim 1 , wherein the first microphone and the second microphone are disposed at different positions of a flexible circuit board claim 1 , wherein the flexible circuit board is disposed in the bone conduction speaker.3. The bone conduction ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A bone conduction speaker , comprising: the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone;', 'at least one microphone disposed in a housing of the bone conduction speaker; and', 'a waterproof mesh cloth having a waterproof function, wherein the waterproof mesh cloth is outside a periphery of the at least one microphone., 'a vibration device comprising a vibration conductive plate and a vibration board, wherein'}2. The bone conduction speaker according to claim 1 , further comprising a bracket disposed with a microphone hole corresponding to the at least one microphone claim 1 , and the waterproof mesh cloth is sandwiched between the at least one microphone and the ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A bone conduction speaker , comprising: 'the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone; and', 'a vibration device comprising a vibration conductive plate and a vibration board, wherein'} a first magnetic component for generating a second magnetic field; and', 'at least one second magnetic component surrounding the first magnetic component, wherein a magnetic gap is formed between the first magnetic component and the at least one second magnetic component, and a magnetic field intensity of the first magnetic field in the magnetic gap is greater than a magnetic field intensity of the second magnetic field in the magnetic gap., 'a magnetic system for generating a ...

LIGHT-EMITTING AUDIO DEVICE, AUDIO OUTPUT DEVICE, AND DISPLAY DEVICE

A light-emitting audio device, an audio output device, and a display device. The light-emitting audio device includes a micro device integrated with a micro LED device and piezoelectric device. Both image display and audio output can be enabled using a single device. Audio is output using a plurality of light-emitting audio devices disposed in a plurality of subpixels, respectively. An increase in the thickness of the display device due to integrate with a audio function can be minimized. A variety of audio output functions are provided by driving the light-emitting audio devices according to areas. 1. A light-emitting audio device , comprising:a light-emitting diode comprising a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer;a piezoelectric device comprising a first electrode layer, a second electrode layer, and a piezoelectric material disposed between the first electrode layer and the second electrode layer;an insulator disposed between the light-emitting diode and the piezoelectric device;a protective portion disposed on a top surface of at least one of the light-emitting diode and the piezoelectric device; anda plurality of electrodes located on the protective portion to be electrically connected to the light-emitting diode or the piezoelectric device.2. The light-emitting audio device according to claim 1 , wherein the light-emitting diode claim 1 , the insulator claim 1 , and the piezoelectric device are stacked on each other.3. The light-emitting audio device according to claim 1 , wherein the piezoelectric device is located on a side of the light-emitting diode claim 1 , andthe insulator is disposed between a side surface of the light-emitting diode and a side surface of the piezoelectric device.4. The light-emitting audio device according to claim 1 , wherein at least one electrode among the plurality of electrodes is electrically connected to ...

ACOUSTIC TRANSDUCER DRIVER AND CONTROLLER

An acoustophoretic system is controlled and driven to attain a desired level of performance. An RF controller and a driver provide a frequency and power to an acoustic transducer, which can be implemented as a piezoelectric element, which presents a reactive load or a complex load. A controller implements a control technique for efficient transducer operation. The control technique can locate a frequency for operation that is at a reactance minimum or maximum for the system to produce a modal pattern and to provide efficient operation of the transducer. A method of detecting a minimum or maximum reactance in a acoustophoretic system used to trap, separate, deflect, cluster, fractionate or otherwise process particles or secondary fluids or tertiary fluids in a primary fluid and utilizing the frequency of the detected reactance to operate the acoustophoretic system. 1. A method of tracking a desired frequency in an acoustophoretic system comprising adjusting the resonant frequency of the acoustophoretic system based on the minimum reactance of the system or Xmin.2. A method for controlling an acoustic transducer , comprising:determining minimum or maximum reactance frequency of the transducer; andproviding a power signal to the acoustic transducer at the minimum or maximum reactance frequency.3. A method for determining an operating setpoint of an acoustic system that includes an acoustic transducer and an acoustic chamber , comprising:determining a reactance value for at least some of a range of frequencies, such that a minimum reactance value is determined for the range of frequencies; andapplying the drive signal to the acoustic transducer at a frequency associated with the minimum reactance value.4. The method according to claim 3 , further comprising:identifying a subset of frequencies in the range of frequencies, the frequency associated with the minimum reactance value being located in the subset; anddetermining a new frequency within the subset associated with ...

SPEAKER DEVICE

The present invention relates to a speaker device () having a first diaphragm () and a second diaphragm (). A first magnet () is mounted to the first diaphragm () and a second magnet () is mounted to the second diaphragm (). The first magnet () is a first electromagnet having a first coil () and a power source driver is provided for supplying an electrical drive signal to the first coil () to establish said first magnetic field. The first and second magnets () are arranged to generate first and second interacting magnetic fields which drive the first and second diaphragms (). The invention also relates to a speaker device () in which the second diaphragm () is replaced with a fixed back plate (). The present invention also relates to a speaker assembly () made up of an array of the speaker devices (). The speaker device () can be used in a motor vehicle. 1. A speaker device comprising:a first diaphragm and a second diaphragm;a first magnet, mounted to the first diaphragm, for generating a first magnetic field;a second magnet, mounted to the second diaphragm, for generating a second magnetic field; anda silencer disposed around said first and second diaphragms and comprising a porous material;wherein the first magnet is a first electromagnet comprising a first coil for receiving a first electrical drive signal to establish said first magnetic field;the first and second magnets being positioned such that, in use, said first and second magnetic fields interact with each other to drive said first and second diaphragms.2. A speaker device as claimed in claim 1 , wherein the second magnet is a second electromagnet comprising a second coil for receiving a second electrical drive signal to establish said second magnetic field.3. A speaker device as claimed in comprising a power source driver configured operatively to supply said first electrical drive signal and/or said second electrical drive signal to drive said first and second diaphragms in opposite directions.4. A ...

Loudpseakers

A loudspeaker comprising two acoustic diaphragms mounted to face in axially-opposed directions, two voice coils each having an axis and an axial length and being configured to reciprocate along its axis to drive one of the diaphragms, the axes being substantially parallel and both axes passing through both diaphragms, and at least one magnet forming part of a chassis assembly configured to provide two axially-extending gaps, one for each of the voice coils to reciprocate within, wherein the at least one magnet and the chassis assembly are adapted so that magnetic flux flows across the gaps in opposite directions, and wherein when in use the diaphragms are at their predetermined maximum negative excursions the voice coils overlap in the axial direction by between 10% and 90% of their average axial length, and wherein when in use the diaphragms are in a relaxed position, between their maximum negative and positive excursions, the voice coils do not overlap in the axial direction. 1. A loudspeaker comprising two acoustic diaphragms mounted to face in axially-opposed directions , two voice coils each having an axis and an axial length and being configured to reciprocate along its axis to drive one of the diaphragms , the axes being substantially parallel and both axes passing through both diaphragms , and at least one magnet forming part of a chassis assembly configured to provide two axially-extending gaps , one for each of the voice coils to reciprocate within , wherein the at least one magnet and the chassis assembly are adapted so that magnetic flux flows across the gaps in opposite directions , and wherein when in use the diaphragms are at their predetermined maximum negative excursions the voice coils overlap in the axial direction by between 10% and 90% of their average axial length , and wherein when in use the diaphragms are in a relaxed position , between their maximum negative and positive excursions , the voice coils do not overlap in the axial direction.2. ...

LOUDSPEAKER

A loudspeaker includes a diaphragm body having a dome shape protruding upwardly, a magnetic circuit disposed below the diaphragm body, a voice coil coupled to the diaphragm body, an edge coupled to an outer circumference of the diaphragm body, and a frame coupled to the edge. The edge includes a first coupling portion provided at an outer circumference of the edge, a second coupling portion provided at an inner circumference of the edge and coupled to an outer circumference of the diaphragm body, and a roll portion disposed between the first coupling portion and the second coupling portion. The edge has a surface facing downward. The frame has a connecting surface disposed below the second coupling portion and coupled to the surface of the edge at the first coupling portion of the edge. This loudspeaker can decrease distortion of sound. 1. A loudspeaker comprising:a diaphragm body having a dome shape protruding upwardly;a first magnetic circuit disposed below the diaphragm body, the first magnetic circuit having a first magnetic gap;a first voice coil having a first end portion and a second end portion, the first end portion being inserted into the first magnetic gap, the second end portion being coupled to the diaphragm body;an edge including a first coupling portion provided at an outer circumference of the edge, a second coupling portion provided at an inner circumference of the edge and coupled to an outer circumference of the diaphragm body, and a roll portion disposed between the first coupling portion and the second coupling portion, the edge having a surface facing downward; anda first frame coupled to the edge,wherein the first frame has a first connecting surface disposed below the second coupling portion and coupled to the surface of the edge at the first coupling portion of the edge.2. The loudspeaker according to claim 1 , wherein the second coupling portion is angled with respect to the first coupling portion.3. The loudspeaker according to claim 1 , ...

Piezoelectric Speaker Driver

A speaker apparatus includes a speaker assembly and a piezoelectric driver. The speaker assembly including a diaphragm and a motor. Application of a first electric current to the motor causes a first movement of a portion of the motor. The first movement causes the diaphragm to move and responsively creates sound energy in a first and non-ultrasonic frequency range. The piezoelectric driver is disposed in proximal relation to the speaker assembly. Application of a second electric current to the piezoelectric driver causes actuation of the piezoelectric driver. The actuation is effective to produce an impact of a portion of the piezoelectric driver with the speaker assembly and causes a second movement of the diaphragm within the speaker assembly. The second movement responsively creates sound energy in a second and ultrasonic frequency range.

Compact coaxial loudspeaker

A loudspeaker can include first and second drivers. The first driver can include a cone that has a center region, a peripheral region surrounding the center region, and a boundary connecting the center region and the peripheral region. A bridge can position the second driver coaxial with and proximal to the first driver. The center region of the cone can be recessed to allow a lower profile of the loudspeaker.

Bone conduction speaker and compound vibration device thereof

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A bone conduction speaker , comprising: 'the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone; and', 'a vibration device comprising a vibration conductive plate and a vibration board, wherein'}a voice control device configured to control the bone conduction speaker based on a voice control instruction received from a user.2. The bone conduction speaker according to claim 1 , wherein the voice control device comprises:a receiving unit configured to receive the voice control instruction from the user;a processing unit configured to generate an instruction signal based on the voice control instruction;a recognition unit configured to identify whether the instruction signal ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present invention relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present invention and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. An acoustic output apparatus , comprising:a vibration device having a vibration conductive plate and a vibration board, wherein the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone; andan interactive control component configured to allow an interaction between a user and the acoustic output apparatus.2. The acoustic output apparatus of claim 1 , wherein the interactive control component comprises at least one of:a button control module, configured to control the acoustic output apparatus based on an instruction input by the user through buttons;a voice control module, configured to control the acoustic output apparatus based on a voice control instruction received from the ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A bone conduction speaker , comprising: 'the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone; and', 'a vibration device comprising a vibration conductive plate and a vibration board, wherein'}a power source assembly configured to provide electrical power;a controller configured to control the bone conduction speaker to generate sound; anda Bluetooth low energy (BLE) module configured to establish communication between the bone conduction speaker and a terminal device of a user.2. The bone conduction speaker according to claim 1 , wherein the power source assembly claim 1 , the controller claim 1 , and the BLE module are disposed in a housing of the bone conduction ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. An acoustic output apparatus , comprising:a vibration device having a vibration conductive plate and a vibration board, wherein the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone; anda Bluetooth low energy (BLE) module configured to establish communication between the acoustic output apparatus and a terminal device of a user.2. The acoustic output apparatus of claim 1 , wherein the BLE module is configured to transmit audio data between the acoustic output apparatus and the terminal device.3. The acoustic output apparatus of claim 2 , wherein to transmit the audio data between the acoustic output apparatus and the terminal device claim 2 , the BLE module is configured ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A bone conduction speaker , comprising: 'the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone; and', 'a vibration device comprising a vibration conductive plate and a vibration board, wherein'}at least one button disposed on a housing of the bone conduction speaker, wherein each of the at least one button corresponds to a button hole disposed on the housing.2. The bone conduction speaker according to claim 1 , further comprising:at least one elastic pad corresponding to the at least one button, respectively, wherein each elastic pad prevents the corresponding button from moving relative to the button hole.3. The bone conduction speaker according to claim 2 , further ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A bone conduction speaker comprising: 'the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being in a range of 20 Hz-20000 Hz, and sounds are generated by the vibrations transferred through a human bone;', 'a vibration device having a vibration conductive plate and a vibration board, wherein'}an ear hook, wherein the ear hook is configured to contact with the head of a user, one or more contact points of the ear hook and the head of the user include a vibration fulcrum of the vibration device when the vibration device vibrates; andat least one button, wherein the at least one button is configured for user operation, and a distance between a center of a button of the at least one button and the vibration fulcrum is not greater than a distance between a center of the vibration ...

Bone conduction speaker and compound vibration device thereof

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.

Ear tip sealing structure

Aspects describe an earpiece with structure for positioning and retaining the earpiece and with structure for sealing against the entrance to the ear canal. According to aspects, the retaining structure has at least one substantially elliptical leg configured to follow the curve of the anti-helix and/or the cymba concha at the rear of the concha. The leg increases in thickness from a tip of the earpiece towards the body of the earpiece. The sealing structure is substantially frusto-conical and extends from a nozzle. The nozzle is angled to align with ear geometry. In an example, he sealing structure has a slight radius on an outer surface of the sealing structure. In another example, the sealing structure has a substantially constant thickness from the nozzle to the wide end of the sealing structure.

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A bone conduction speaker , comprising a vibration device and a plurality of acoustic-electric transducers , whereinthe vibration device includes a vibration conductive plate and a vibration board, the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being in a range of 80 Hz-18000 Hz, and sounds are generated by the vibrations transferred through a human bone; and the first acoustic-electric transducer is configured to detect an audio signal, and generate a first sub-band signal according to the audio signal; and', 'the second acoustic-electric transducer is configured to detect the audio signal, and generate a second sub-band signal according to the audio signal., 'the plurality of acoustic-electric transducers includes a first acoustic-electric transducer having a first ...

Display Apparatus

A display apparatus includes a display panel configured to display an image by emitting light, and a sound generating device on a rear surface of the display panel. The sound generating device includes a bobbin, and a protection member on the bobbin. 1. A display apparatus , comprising: a first area;', 'a second area; and', 'a third area;, 'a display panel configured to display an image by emitting light, the display panel comprisinga first generating device in the first area, the first generating device comprising two sub-sound generating devices;a second generating device in the second area, the second generating device comprising two sub-sound generating devices; anda third generating device in the third area.2. The display apparatus of claim 1 , further comprising:a first partition between the first area and the third area; anda second partition between the second area and the third area.3. The display apparatus of claim 1 , further comprising:a first partition between the first area and the third area;a second partition between the second area and the third area; anda third partition in a periphery of the display panel.4. The display apparatus of claim 3 , wherein the third partition comprises one of a sealed structure and an unsealed structure.5. The display apparatus of claim 1 , further comprising:a first partition between the first area and the third area;a second partition between the second area and the third area; a first side; and', 'a second side perpendicular to the first side; and, 'a third partition in a periphery of the display panel, the third partition comprisingat least one bent portion in at least one of the first side and the second side of the third partition.6. The display apparatus of claim 5 , wherein the at least one bent portion is disposed toward one or more of the first sound generating device claim 5 , the second sound generating device claim 5 , and the third sound generating device.7. The display apparatus of claim 1 , further ...

Electro-acoustic transducer

An electro-acoustic transducer includes a frame with an accommodating space defined therein and an opening opened in a top surface thereof, at least one driving unit equipped in the accommodating space of the frame, a diaphragm movably mounted at the opening of the frame, at least one fulcrum settled in the accommodating space of the frame, and at least one lever placed next to the fulcrum to contact with and use the fulcrum as rotation center thereof. The lever connects with the driving unit and the diaphragm at two ends thereof and transmits vibration wave from the driving unit to the diaphragm. The lever has a longer length from the fulcrum to the diaphragm than from the fulcrum to the driving unit for increasing the vibration stroke of the diaphragm during transmitting the vibration wave.

SPEAKERS AND HEADPHONES RELATED TO VIBRATIONS IN AN AUDIO SYSTEM, AND METHODS FOR OPERATING SAME

A speaker assembly includes a support structure and a tactile vibrator coupled to the support structure. The tactile vibrator includes a plurality of rigid members coupled to a plurality of suspension members. Each rigid member of the plurality of rigid members has at least one magnetic member coupled thereto for generating tactile vibrations during operation of the speaker assembly. A headphone includes the speaker assembly. A method of operating a speaker assembly includes driving a tactile vibrator having a plurality of magnetic members coupled to a plurality of rigid members and a plurality of suspension members to cause tactile vibrations in the speaker assembly. 1. A headphone , comprising:a first speaker assembly for a first ear of a user; and a support structure;', 'an audio driver coupled to the support structure and configured to convert an audio signal to audible sound; and', a first rigid member;', 'a second rigid member, wherein the first rigid member is annular and concentric to the second rigid member;', 'a first suspension member coupled between the first rigid member and the support structure; and', 'a second suspension member coupled between the first rigid member and the second rigid member, wherein each of the first rigid member and the second rigid member has at least one magnetic member coupled thereto for generating tactile vibrations during operation of the speaker assembly., 'a tactile vibrator configured as a multiple spring/mass driver system, the tactile vibrator coupled to the support structure and including], 'a second speaker assembly for a second ear of the user, wherein each speaker assembly includes2. The headphone of claim 1 , wherein the first rigid member includes a plurality of magnetic members coupled thereto.3. The headphone of claim 2 , further comprising a controller configured to generate at least one signal for driving the plurality of magnetic members coupled to the first rigid member.4. The headphone of claim 3 , wherein ...

DOUBLE RING RADIATOR AND DUAL CO-AX DRIVER

A driver for a loudspeaker including an inner magnet disposed within a housing, an outer magnet disposed within the housing radially outward of the inner magnet, an inner voice coil having a first diameter, an outer voice coil having a second diameter, the second diameter being larger than the first diameter, where poles of the inner and outer magnets are oppositely disposed, where the inner magnet is configured to contribute only to a magnetic circuit of the inner voice coil, and where the outer magnet is configured to contribute to the magnetic circuit of the inner voice coil and to a magnetic circuit of the outer voice coil. 1. A driver for a loudspeaker comprising:an inner magnet disposed within a housing of the loudspeaker;an outer magnet disposed within the housing radially outward of the inner magnet;an inner voice coil having a first diameter;an outer voice coil having a second diameter, the second diameter being larger than the first diameter;wherein poles of the inner and outer magnets are oppositely disposed;wherein the inner magnet is configured to contribute only to a magnetic circuit of the inner voice coil; andwherein the outer magnet is configured to contribute to the magnetic circuit of the inner voice coil and to a magnetic circuit of the outer voice coil.2. The driver of claim 1 , wherein the inner magnet is disposed centrally within the driver and the inner voice coil is disposed radially outward of the inner magnet.3. The driver of claim 2 , wherein the outer magnet is disposed radially outward of the inner voice coil and the outer voice coil is disposed radially outward of the outer magnet.4. The driver of claim 3 , wherein the inner magnet claim 3 , the outer magnet claim 3 , the inner voice coil claim 3 , and the outer voice coil are disposed at an interior of a yolk of the loudspeaker having a U-shaped cross-section.5. The driver of claim 1 , wherein at least one of the inner and outer magnets are annularly shaped.6. The driver of claim 1 , ...

TWO-WAY LOUDSPEAKER WITH FLOATING WAVEGUIDE

One or more embodiments of the present disclosure relate to a two-way loudspeaker design that forces a condensed geometry between low frequency (LF) and high frequency (HF) drivers and then “floats” a midrange waveguide in front of the LF driver. This is a hybrid design meant to benefit from the close proximity of acoustic centers without introducing a central axis obstruction for the LF driver. In addition, the LF and HF waveguides and associated acoustic elements are used to redirect very low frequency energy not supported adequately by the LF waveguide to exit freely using other paths. 1. A loudspeaker comprising:a speaker enclosure;a low-frequency (LF) driver disposed in the speaker enclosure and having a radiating surface adapted to emit LF acoustic energy and a radiating surface opening defined by an outer circumference of the radiating surface; andan LF waveguide defining a first radiation path for LF acoustic energy, the LF waveguide having a proximal opening positioned adjacent to the LF driver and extending away from the LF driver to a distal opening to define the first radiation path therethough, the proximal opening having a proximal opening area that is smaller than a radiating surface opening area to define a second radiation path for the LF acoustic energy around an outer surface of the LF waveguide.2. The loudspeaker of claim 1 , wherein the distal opening of the LF waveguide has a distal opening area that is larger than the radiating surface opening area.3. The loudspeaker of claim 1 , wherein the LF waveguide is detached from the LF driver to define an air gap between the radiating surface of the LF driver and the proximal opening of the LF waveguide.4. The loudspeaker of claim 1 , wherein an inner surface and an outer surface of the LF waveguide have generally equal acoustic pressure from the LF driver.5. The loudspeaker of claim 1 , wherein the second radiation path exits the speaker enclosure along a front surface.6. The loudspeaker of claim 1 , ...

BONE CONDUCTION SPEAKER AND COMPOUND VIBRATION DEVICE THEREOF

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader. 1. A bone conduction speaker , comprising: 'the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone;', 'a vibration device comprising a vibration conductive plate and a vibration board, wherein'}a microphone configured to receive a first signal including a voice signal and a first vibration signal; and 'the microphone and the vibration sensor are configured such that the first vibration signal can be offset with the second vibration signal.', 'a vibration sensor configured to receive a second vibration signal, wherein'}2. The bone conduction speaker according to claim 1 , further comprising a housing claim 1 , wherein the bone conduction speaker claim 1 , the microphone claim ...

Earbud with External Driver Mount

An earbud comprises a housing a duct and a driver carried by the duct. A press-fit connection is formed between the driver and the duct. The driver comprises a plug extending through a distal end of the duct, and positioned both in and out of the duct. The plug of the driver has a smooth, continuous and straight outer surface along the length thereof. The plug has a greatest outer diameter of the entire driver. 1. An earbud comprising:a housing having a hollow;a duct carried by the housing and defining a canal, the duct having an open proximal end open to the hollow of the housing and a distal end;a driver carried by the duct and closing the distal end of the duct; anda press-fit connection between the driver and the duct.2. The earbud of claim 1 , further comprising:the duct having an inner diameter; andthe driver having a plug received in the distal end of the duct having an outer diameter greater than the inner diameter of the duct, forming the press-fit connection3. The earbud of claim 1 , further comprising:the driver having a plug both in and out of the duct with a smooth, continuous and straight surface along the length thereof.4. The earbud of claim 1 , further comprising:the driver having plug received in the distal end of the duct, the plug being formed of metal and being less compliant; andthe duct being formed of plastic and being more compliant to receive the plug.5. The earbud of claim 1 , further comprising:the driver having a plug extending through the distal end of the duct;the plug comprising a substantial cylinder with an outer diameter that is substantially constant within 3% from one end to an opposite end; andthe plug having the greatest outer diameter of the entire driver with a distal portion of the driver having an outer diameter less than the outer diameter of the plug.6. The earbud of claim 1 , further comprising:the duct having a frusto-conical shape with the proximal end having a greater diameter than the distal end; andthe canal having ...

MULTI-DRIVER TRANSDUCER HAVING SYMMETRICAL MAGNETIC CIRCUIT AND SYMMETRICAL COIL CIRCUIT

A multi-driver transducer having symmetrical magnetic circuits and symmetrical coil circuits, wherein one or more pieces of circular or annular partitions made of a non-magnetic material are used to bond two or more sets of dual magnetic gap and dual coil driver units ( or ) into one integrated magnetic core. Four or more coaxial isodiametric annular magnetic gaps are formed between the inner circumferential face or outer circumferential face of one or two tubular magnetic yokes embedded in an open-end tubular thin wall of the bracket and the vertical circumferential face of an upper pole plate and a lower pole plate of the magnetic core, four or more coaxial and isodiametric coils are inserted in the four or more coaxial and isodiametric annular magnetic gaps, and the winding direction, connection manner, and necessary technical features of the coils are governed; thus, the multi-driver transducer having one or more pairs of mutually-repelling magnets, symmetrical magnetic circuits, and symmetrical coil circuits is constituted. Back electromotive force and inductance acquired via induction by the transducer during the working process are mutually offset. The transducer has resistive load features or near-resistive load features, and has super-high sensitivity, high resolution, and high-fidelity quality. 1. A multi-driver transducer having symmetrical magnetic circuits and symmetrical coil circuits , comprising: magnetic circuits , and a frame and a bracket integrally bound to the magnetic circuits; coaxial and isodiametric magnetic gaps , and a coil framework inserted into the magnetic gaps , with mutually insulated wires wound in parallel on the coil framework which constitute coils; a vibrating diaphragm or planar sounding board bound to the coil framework and at least one damper , wherein , the vibrating diaphragm or planar sounding board is driven by the piston motion of the coil framework to vibrate and give off sound , or the vibrating diaphragm detects sound ...

BONE CONDUCTION SPEAKER AND BONE CONDUCTION HEADPHONE DEVICE

A bone conduction speaker includes a vibration driver that includes a magnetic circuit and a vibration plate, and that is configured to convert sound into vibration, a vibration body configured to hold a side of the vibration driver, which is adjacent to the magnetic circuit, to come into contact with a subject, and to transmit vibration of the vibration driver to the subject, and a lid body configured to cover a side of the vibration driver, which is adjacent to the vibration plate, without being in contact with the vibration driver, and to substantially seal the vibration driver together with the vibration body. 1. A bone conduction speaker configured to transmit vibration to a subject without interposition of air to allow the subject to recognize sound , the bone conduction speaker comprising:a vibration driver including a magnetic circuit and a vibration plate, the vibration driver being configured to convert sound into vibration;a vibration body configured to hold a side of the vibration driver, the side being adjacent to the magnetic circuit, to come into contact with the subject, and to transmit vibration of the vibration driver to the subject; anda lid body configured to cover a side of the vibration driver, the side being adjacent to the vibration plate, without being in contact with the vibration driver, and to substantially seal the vibration driver together with the vibration body.2. The bone conduction speaker according to claim 1 , wherein the vibration body includesa holding part having a plate shape having a surface configured to hold the vibration driver, and another surface configured to come into contact with the subject,a peripheral part made of an elastic material, the peripheral part lying on an outer periphery of the holding part, the peripheral part being configured to come into contact with the subject together with the holding part, anda wall part rising from the peripheral part.3. The bone conduction speaker according to claim 1 , wherein ...

BONE CONDUCTION MICROPHONE, BONE CONDUCTION HEADSET, AND COMMUNICATION DEVICE

A bone conduction microphone is configured to convert vocal cord vibration into a sound signal. The bone conduction microphone includes a vibration collection unit configured to come into contact with a human body and collect vibration in a predetermined direction, which is included in the vocal cord vibration, and a switch configured to switch whether collection of the vibration in the predetermined direction is enabled. The switch is disposed on a side of the vibration collection unit, which is opposite to a side configured to come into contact with the human body, to allow a direction of an operation of switching whether collection of the vibration in the predetermined direction is enabled to be parallel to the predetermined direction. 1. A bone conduction microphone configured to convert vocal cord vibration into a sound signal , the bone conduction microphone comprising:a vibration collection unit configured to come into contact with a human body and collect vibration in a predetermined direction, the vibration being included in vocal cord vibration; anda switch configured to switch whether collection of the vibration in the predetermined direction is enabled,wherein the switch is disposed on a side of the vibration collection unit, the side being opposite to a side configured to come into contact with the human body, to allow a direction of an operation of switching whether the collection of the vibration in the predetermined direction is enabled to be parallel to the predetermined direction.2. The bone conduction microphone according to claim 1 , whereinthe switch is configured to be turned on when the vibration collection unit is pressed onto the human body, and to be turned off when the vibration collection unit is detached from the human body, andthe vibration collection unit is configured to collect vibration in the predetermined direction when the switch is in an on state, and not to collect vibration in the predetermined direction when the switch is in ...

MULTIPOLE ENGINE ARRAY SYSTEM AND LOUDSPEAKER

The present invention provides a multipole engine array system and a loudspeaker, the multipole engine array system comprising a plurality of engine assemblies distributed in an annular array, the plurality of engine assemblies being fixed inside the cylindrical loudspeaker by means of a mounting base provided in a housing of the cylindrical loudspeaker; each engine assembly comprises a magnetic conduction plate and a magnet provided in the magnetic conduction plate; a magnetic field is formed between the magnet and the magnetic conduction plate; and the plurality of engine assemblies are arranged coaxially and annularly along the periphery of the mounting base, so as to form a multipole magnetic field having a plurality of magnetic pole directions. In the present invention, a multipole magnetic field enclosed by planes is formed by means of monopole equal-magnetic-plane magnetic fields in a multipole way, such that each pole face of an inductive diaphragm radiates sound waves with controllable power to any settable angular space at different angles; the diaphragms are driven to vibrate at the same time, so as to form more audio information, improving the power and efficiency of the loudspeaker, and increasing the response speed. 1. A multipole engine array system , which is applied to a cylindrical loudspeaker , wherein the multipole engine array system comprises a plurality of engine assemblies distributed in an annular array , the plurality of engine assemblies are fixed inside the cylindrical loudspeaker through a mounting seat arranged in a housing of the cylindrical loudspeaker , each of the engine assemblies comprises a magnetic conduction plate and a magnet arranged in the magnetic conduction plate , a magnetic field is formed between the magnet and the magnetic conduction plate , and the plurality of the engine assemblies are arranged coaxially and annularly along a periphery of the mounting seat to form a multipole magnetic field with multiple magnetic ...

Audio systems and methods employing an array of transducers optimized for particular sound frequencies

Systems and methods for generating sound, detecting sound, and generating and detecting sound are provided. An array of audio transducers can be provided whereby each audio transducer in the array can be optimized for a narrow range of sound frequencies. When operating at or close to its resonant frequency, a transducer can generate (and/or detect) sound with a higher efficiency and less distortion as compared to other frequencies. Accordingly, sound may be divided into component signals such that each transducer is only responsible for generating (and/or detection) sound close to its resonant frequency. This sound reproduction (and/or detection) technique can increase efficiency, and therefore, can increase the total output volume that an array can generate using a given amount of input power when generating sound (and/or increase the total output power that an array can generate using a given amount of input volume when detecting sound).

Force Balanced Micro Transducer Array

Embodiments are directed to a micro transducer array comprising a shared motor system having a base plate and mounting interfaces to a frame of a portable electronic device; a first transducer comprising a first magnet disposed between the base plate and a first top plate, and a first diaphragm projecting sound out of a surface of the portable device; a second transducer comprising a second magnet disposed between the base plate and a second top plate, and a second diaphragm projecting sound of an opposite surface of the portable device; a first pair of input terminals inputting a first audio signal to the first transducer; and a second pair of input terminals inputting a second audio signal to the second transducer.

PANEL VIBRATION TYPE SOUND GENERATING DISPLAY DEVICE

A panel vibration type sound generating display device is disclosed. The display device includes a display panel for displaying an image; a sound generating actuator connected to the display panel and configured to vibrate the display panel to generate sound; a support structure spaced apart from the display panel with an air gap between the support structure and the display panel; and a baffle part disposed between the support structure and the display panel to surround the air gap. 1. A panel vibration type sound generating display device comprising:a display panel for displaying an image;a sound generating actuator connected to the display panel and configured to vibrate the display panel to generate sound;a support structure spaced apart from the display panel with an air gap between the support structure and the display panel; anda baffle part disposed between the support structure and the display panel to surround the air gap.2. The display device of claim 1 , wherein the support structure comprises a support hole to accommodate the sound generating actuator.3. The display device of claim 1 , wherein the support structure is configured to cover and support the display panel.4. The display device of claim 1 , wherein the baffle part comprises at least one of an adhesive member and a sealing part disposed outside of the adhesive member.5. The display device of claim 1 , further comprising:a source printed circuit board (PCB) on the display panel; anda buffer member between the support structure and the source PCB.6. The display device of claim 1 , wherein the sound generating actuator comprises:a plate connected to the support structure;a magnet disposed on the plate;a center pole disposed at a center of the plate;a bobbin surrounding the center pole and connected to the display panel; anda coil wound around the bobbin.7. The display device of claim 6 , wherein the plate includes an extension part connected to an exterior surface of the support structure.8. The ...

METHOD FOR AVOIDING AN OFFSET OF A MEMBRANE OF A ELECTRODYNAMIC ACOUSTIC TRANSDUCER

A method for avoiding an offset of a membrane () of an electrodynamic acoustic transducer () having two voice coils () is presented, wherein a control voltage (U) is applied to at least one of the voice coils () until the electromotive force (U) of the first coil () or a parameter derived thereof and the electromotive force (U) of the second coil () or a parameter derived thereof substantially reach a predetermined relation. Furthermore, an electronic offset compensation circuit () is presented, which performs the above application of a control voltage (U). Finally, the invention relates to a transducer system with a transducer () and an electronic offset compensation circuit () connected to the transducer (). 1. Method for avoiding an offset of a membrane of an electrodynamic acoustic transducer having two voice coils ,{'sub': CTRL', 'emf1', 'emf2, 'wherein a control voltage Uis applied to at least one of the voice coils and altered until the electromotive force Uof the first coil or a parameter derived thereof and the electromotive force Uof the second coil or said parameter derived thereof substantially reach a predetermined relation.'}2. Method as claimed in claim 1 , wherein the electromotive force Uof the first coil and the electromotive force Uof the second coil are calculated by the formulas{'br': None, 'i': U', '=U', 't', 'Z', '·I', 't, 'sub': emf1', 'in1', 'C1', 'in, '()−()'}{'br': None, 'i': U', '=U', 't', 'Z', '·I', 't, 'sub': emf2', 'in2', 'C2', 'in, '()−()'}{'sub': C1', 'in1', 'in', 'C2', 'in2', 'in, 'wherein Zis the coil resistance of the first coil, U(t) is the input voltage to the first coil at the time t and I(t) is the input current to the first coil at the time t and wherein Zis the coil resistance of the second coil, U(t) is the input voltage to the second coil at the time t and I(t) is the input current to the second coil at the time t.'}3. Method as claimed in claim 2 , wherein a parameter derived from the electromotive force U claim 2 , Uis ...

SYSTEM AND METHOD FOR APPLYING A SOUND SIGNAL TO A MULTI COIL ELECTRODYNAMIC ACOUSTIC TRANSDUCER

A transducer system, comprising an electrodynamic acoustic transducer () with a membrane (), a plurality of voice coils () electrically switched in series, and a magnet system () is presented, wherein just an outer tap/terminal (T) of the serially connected voice coils () is electrically connected to an audio output of an amplifier (). Moreover, a method for feeding a sound signal to an electrodynamic acoustic transducer () is presented, wherein the voice coils () are driven by an audio signal just via an outer tap/terminal (T) of the serially connected voice coils (). 1. Transducer system , comprising:an electrodynamic acoustic transducer with a membrane;a coil arrangement attached to the membrane, wherein the coil arrangement comprises at least two voice coils electrically switched in series;a magnet system being designed to generate a magnetic field transverse to a longitudinal direction of a wound wire of the coil arrangement;a tap/terminal of the coil arrangement/serially connected voice coils being electrically connected to an audio output of an amplifier.2. Transducer system according to claim 1 , wherein the coil arrangement is electrically connected to the audio output of a single amplifier.3. Transducer system according to claim 1 , wherein a connection point between two voice coils is electrically connected to an input of the amplifier or electronic circuit.4. Transducer system according to claim 2 , wherein the electrical connection to outer taps/terminals of the serially connected voice coils and the electrical connection to the connection point between two voice coils are the only electrical connection between the amplifier/electronic circuit and the plurality of voice coils.5. Transducer system according to claim 1 , comprising an electronic offset compensation module/circuit claim 1 , which is designed to be connected to the coil arrangement of the electrodynamic acoustic transducer claim 1 , wherein the coil arrangement comprises two voice coils and ...

Loudspeaker with compliantly coupled low-frequency and high-frequency sections

A loudspeaker comprises a first acoustically radiating moving-coil transducer and a second acoustically radiating moving-coil transducer. Each transducer is actively driven by an electrical input signal. The first and second transducers are substantially coaxial and at least part of the second transducer is positioned within a central gap of the first transducer such that the voice-coil assemblies of the two transducers are arranged concentrically and are separated by an annular gap. The gap is substantially sealed by a compliant coupling means such that the two transducers move substantially in unison when the loudspeaker reproduces an input signal that has a frequency below a certain threshold value, but move substantially independently when the loudspeaker reproduces an input signal that has a frequency above the threshold.

EARBUDS WITH ISOBARIC CHAMBERS TO MANIPULATE BASS RESPONSE

Multiple speakers and isobaric chambers are used to enhance sound quality in an earbud. The earbud has a housing with a sound outlet, a first and second isobaric chambers that are in communication with the outlet. Two sound drivers in the housing are positioned to emit sound waves into the isobaric chambers separately. A divider is used to guide sound waves by creating an elongated channel in the second isobaric chamber. An ear hook has a third isobaric chamber and a third sound driver positioned to emit sound wave into the third isobaric chamber. The third isobaric chamber is in communication with the outlet through the second isobaric chamber. 1. An earbud , comprising:a housing comprising a first isobaric chamber, a second isobaric chamber, and a sound outlet that is in communication with the first isobaric chamber and the second isobaric chamber, wherein the second isobaric chamber comprises a first portion and a second portion divided by a partial wall and the second portion terminates in a terminal wall having a first face that is exposed to the first isobaric chamber and a second face that is exposed to the second isobaric chamber, wherein the first portion is positioned closer to the second sound driver than the second portion, and wherein the second portion terminates in a terminal wall;a first sound driver positioned to emit a first sound wave into the first isobaric chamber and coupled to a first face of the terminal wall; anda second sound driver coupled to a second face of the terminal wall and positioned to emit a second sound wave into the second isobaric chamber.2. The earbud of claim 1 , wherein the second sound wave in the first portion of the second isobaric chamber travels away from the sound outlet.3. The earbud of claim 1 , wherein the first sound driver is configured to emit sound waves in a middle frequency range and a treble frequency range claim 1 , and the second sound driver is configured to emit sound waves in a bass frequency range.4. ...