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Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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25-10-2021 дата публикации

Устройство защиты акустической информации от негласного получения портативным устройством

Номер: RU0000207342U1
Автор: Владимир Николаевич Световидов
Принадлежит: Владимир Николаевич Световидов

Полезная модель относится к области защиты речевой информации, а более конкретно к устройству для предотвращения негласного получения акустических сигналов портативными устройствами, размещенными в нем. Технический результат, достигаемый при реализации указанного решения, заключается в повышении эффективности защиты речевой информации от негласного получения портативным устройством. Устройство защиты акустической информации от негласного получения портативным устройством содержит: экранирующий корпус, включающий: звукопоглощающий слой; запирающий механизм; ячейки для хранения портативных устройств: генератор ультразвуковых помех, выполненный с возможностью генерации ультразвукового шумового сигнала; генератор акустических помех, выполненный с возможностью генерации шумового сигнала; ультразвуковые излучатели; акустические излучатели; источник питания; экранированный разъем; модуль сетевого взаимодействия. 6 з.п. ф-лы, 3 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 207 342 U1 (51) МПК G10K 11/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК H04K 3/00 (2021.08); G10K 11/175 (2021.08) (21)(22) Заявка: 2021115572, 20.07.2021 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Световидов Владимир Николаевич (RU) Дата регистрации: 25.10.2021 Приоритет(ы): (22) Дата подачи заявки: 20.07.2021 (45) Опубликовано: 25.10.2021 Бюл. № 30 2 0 7 3 4 2 R U (54) УСТРОЙСТВО ЗАЩИТЫ АКУСТИЧЕСКОЙ ИНФОРМАЦИИ ОТ НЕГЛАСНОГО ПОЛУЧЕНИЯ ПОРТАТИВНЫМ УСТРОЙСТВОМ (57) Реферат: Полезная модель относится к области защиты включающий: звукопоглощающий слой; речевой информации, а более конкретно к запирающий механизм; ячейки для хранения устройству для предотвращения негласного портативных устройств: генератор получения акустических сигналов портативными ультразвуковых помех, выполненный с устройствами, размещенными в нем. Технический возможностью генерации ультразвукового результат, достигаемый при реализации ...

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Номер записи: 1
02-02-2012 дата публикации

Noise attenuator and vehicle air intake duct provided therewith

Номер: US20120024623A1
Автор: Katsuhiro Tange, Takashi Yamaguchi
Принадлежит: Inoac Corp

A noise attenuator which can reduce time and cost for installation thereof as compared with the conventional configuration and a vehicle air intake duct provided with the noise attenuator are provided. The noise attenuator includes a pair of circular through holes formed through a duct wall, a pair of wave transmitting/receiving membrane which are stretched so as to close the circular through holes, and a seesaw member which connects between central portions of the paired transmitting/receiving membranes. Accordingly, when one of the membranes receives a sound wave of noise thereby to be vibrated at a predetermined frequency, the other membrane follows it and is also vibrated while shifted by a half cycle. As a result, a cancellation wave with a phase opposite to the sound wave received by the one membrane is transmitted from the other membrane, whereupon the noise can be attenuated.

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Номер записи: 2
22-03-2012 дата публикации

Method and device for narrow-band noise suppression in a vehicle passenger compartment

Номер: US20120070013A1
Автор: Bernard Vau
Принадлежит: IXMOTION

A method and a device for suppressing noise in the passenger compartment of a vehicle, which include at least one transducer, a programmable computer, at least one acoustic sensor, the computer being configured such as to apply an electro-acoustic model of the passenger compartment to a correcting system model including a central controller with fixed coefficients joined to a block of variable coefficients, including a Youla parameter in the form of a Youla block Q. The first phase includes determining and calculating the electro-acoustic model and the control law for at least one predetermined noise frequency. In a second phase, in real time, the computer applies the control law to the electro-acoustic model in accordance with the current frequency of the noise to be suppressed.

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Номер записи: 3
21-06-2012 дата публикации

Attenuators, arrangements of attenuators, acoustic barriers and methods for constructing acoustic barriers

Номер: US20120152650A1
Автор: Daniel Peter Elford, Feodor Kusmartsev, Gerard Michael Swallowe, Luke Chalmers
Принадлежит: Loughborough University

An attenuator for attenuating acoustic waves, the attenuator comprising: a first body defining a cavity therein and an elongate open aperture extending across a substantial portion of the first body, the first body being configured to attenuate acoustic waves over a resonant frequency band.

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Номер записи: 4
28-06-2012 дата публикации

Operational noise control method for air conditioner

Номер: US20120164931A1
Автор: Masaki Ohtsuka, Yasukata Takeda
Принадлежит: Individual

An operation noise control method for an air conditioner includes: a step (S 1 ) of detecting an operation mode of the air conditioner; a step (S 2 ) of operating an air flow guide panel ( 20 ) in accordance with the detected operation mode and controlling the air flow guide panel ( 20 ) so as to form a duct-like outlet passage ( 10 ) in a vicinity of an outlet ( 5 ); a step (S 3 ) of selecting a sound wave which is preset in accordance with the operation mode; and a step (S 4 ) of radiating the selected sound wave in the duct-like outlet passage ( 10 ) from a speaker ( 21 ).

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Номер записи: 5
05-07-2012 дата публикации

Noise attenuation panel and a gas turbine component comprising a noise attenuation panel

Номер: US20120168248A1
Автор: Lars-Erik Eriksson, Markus Olander Burak
Принадлежит: Volvo Aero Corp

A noise attenuation panel includes a first wall, a second wall and partition walls connected to the first and second walls and defining cells between the first and second walls. The first wall is provided with a plurality of through holes. At least two of the cells are interconnected via a communication hole. One of the through holes leads to a first of the at least two interconnected cells and a second of the interconnected cells is configured to prevent any gas flow through the second cell.

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Номер записи: 6
12-07-2012 дата публикации

Active noise-cancellation feedback signal transmission

Номер: US20120177213A1
Автор: Laurent Le Faucheur
Принадлежит: Texas Instruments Inc

A noise-cancelling system includes headset for generating a feedback signal for noise-cancellation in response to sound externally generated from the headset. An encoded microphone signal is generated in response to the first feedback signal. An audio generator can be used to generate a noise-cancellation signal in response to the encoded microphone signal and to generate an electronic audio signal in response to the encoded microphone signal and a first output audio signal. An audio connector is provided to couple the encoded microphone signal from the headset to the audio generator and to couple the first electronic audio signal to the headset.

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Номер записи: 7
06-09-2012 дата публикации

Vibration damping device and vehicle provided with the vibration damping device

Номер: US20120226414A1
Автор: Hideaki Moriya, Takeo Ito, Takeshi Tomizaki, Yasushi Muragishi
Принадлежит: Sinfonia Technology Co Ltd

A damping device includes a calculator calculating a pseudo vibration to cancel a source vibration transmitted from a vibration source to a position to be damped, using an adaptive control algorithm. The canceling vibration is generated according to the pseudo vibration. A vibration detector detects an error vibration remaining at the position. The adaptive control algorithm is adapted by learning to reduce the error vibration. A frequency recognizer recognizes a frequency of the source vibration from a signal related to the vibration source. The frequency of the vibration is used to determine a frequency of the pseudo vibration. A phase difference identifier identifies a phase difference between the error vibration and the canceling vibration according to the pseudo vibration, and a frequency corrector corrects, according to the phase difference, the frequency of the vibration to eliminate the phase difference.

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Номер записи: 8
15-11-2012 дата публикации

System and method for noise suppression

Номер: US20120285768A1
Автор: Alan Richard Douglas, Ray Listak
Принадлежит: Rohr Inc

Systems and methods for noise suppression are disclosed herein. In one embodiment, an acoustic structure has a core that includes a plurality of cells. Each of the plurality of cells includes one or more engaging structures for positioning a septum relative to the cell. The acoustic structure further includes a plurality of septums positioned relative to the plurality of cells.

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Номер записи: 9
29-11-2012 дата публикации

Radio frequency particles

Номер: US20120299762A1
Автор: Gary A. Frazier
Принадлежит: Raytheon Co

Particle circuits for disrupting signals associated with a communication system or for marking a position of a device are provided. In one embodiment, the invention relates to a composite for generating radio frequency (RF) signals, the composite including a medium configured to adhere to a device for emanating communication signals, and at least one particle circuitry within the medium, wherein the at least one particle circuitry is configured to radiate radio frequency signals for disrupting the communication signals of the device.

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Номер записи: 10
29-11-2012 дата публикации

Active vibration noise control device

Номер: US20120300955A1
Автор: Akihiro Iseki, Kensaku Obata, Yoshiki Ohta, Yoshitomo Imanishi
Принадлежит: Pioneer Corp

An active vibration noise control device cancels vibration noise by making plural speakers generate control sounds. The active vibration noise control device selects one or more speakers which output the control sounds, from plural speakers, based on a relationship between (1) a first phase difference which corresponds to a difference between phase characteristics of the vibration noise from a vibration noise source to an evaluation point and phase characteristics of the vibration noise from the vibration noise source to a pseudo evaluation point and (2) a second phase difference for each of the plural speakers corresponding to a difference between phase characteristics of the control sound from the speaker to the evaluation point and phase characteristics of the control sound from the speaker to the pseudo evaluation point. Therefore, it stably decreases the vibration noise at the pseudo evaluation point independently of a frequency band of the vibration noise.

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Номер записи: 11
06-12-2012 дата публикации

Adaptive noise canceling architecture for a personal audio device

Номер: US20120308025A1
Автор: Ali Abdollahzadeh Milani, Gautham Devendra Kamath, Jeffrey Alderson, Jon D. Hendrix, Nitin Kwatra
Принадлежит: Cirrus Logic Inc

A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio and an error microphone signal that measures the output of an output transducer plus any ambient audio at that location and injects the anti-noise signal at the transducer output to cause cancellation of ambient audio sounds. A processing circuit uses the reference and error microphone to generate the anti-noise signal, which can be generated by an adaptive filter operating at a multiple of the ANC coefficient update rate. Downlink audio can be combined with the high data rate anti-noise signal by interpolation. High-pass filters in the control paths reduce DC offset in the ANC circuits, and ANC coefficient adaptation can be halted when downlink audio is not detected.

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Номер записи: 12
06-12-2012 дата публикации

Replay apparatus, signal processing apparatus, and signal processing method

Номер: US20120310636A1
Автор: Kazunobu Ookuri, Kohei Asada, Yasunobu Murata
Принадлежит: Sony Corp

A method of selectively performing signal processing in a first mode and in a second mode. In the first mode, a noise cancel signal having a signal characteristic to cancel an external noise component is generated based on a voice signal supplied from a microphone, and an input digital audio signal and the noise cancel signal are combined into a voice signal to be output through a speaker. In the second mode, a sound process for vocal voice is performed on a voice signal supplied from a microphone, a vocal voice component is canceled from a digital audio signal of input music to generate a karaoke signal, and the karaoke signal and the vocal signal are combined into a voice signal to be output through a speaker. The first mode corresponds to an audio replay operation accompanied by noise cancel, and the second mode corresponds to a karaoke operation.

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Номер записи: 13
20-12-2012 дата публикации

Secure Inductively-Coupled Communications Systems

Номер: US20120322372A1
Автор: Michael L. Oristaglio, Ralf Birken, Scott Macintosh, Thorkild Hansen
Принадлежит: Seknion Inc

Security in inductively coupled communications systems, such as near field communications (NFC), may be improved by restricting signals carrying user data to an authorized data transmission region. Security may be particularly important when the NFC carries financial transaction information or authorization credentials. Scramble signals may be transmitted along with data signals carrying the user data and designed to overshadow the data signals outside of the authorized data transmission region. The scramble signal transceiver may be designed to have a slower decay rate with distance from the transceiver than the data signal. By adjusting the power levels of the scramble signal and the data signal, the authorized data transmission region may be adjusted. Scramble signals may not be required if the data signal strength outside the authorized data transmission region is below the minimum threshold value required by eavesdropping receivers.

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Номер записи: 14
31-01-2013 дата публикации

Acoustic Array of Polymer Material

Номер: US20130025967A1
Автор: David C. Seib
Принадлежит: Dresser Rand Co

The invention is an acoustic liner for attenuating noise in rotating machinery. The acoustic liner may include a plurality of cells coupled together to form an annular cell matrix, the plurality of cells being made of a non-metallic material, for example, plastics, polymers, thermoplastics, or thermosets. Each cell of the acoustic liner may be hexagonally-shaped such that the annular cell matrix forms a honeycomb structure.

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Номер записи: 15
21-02-2013 дата публикации

Active vibration noise control device

Номер: US20130044891A1
Автор: Akihiro Iseki, Kensaku Obata, Yoshiki Ohta, Yoshitomo Imanishi
Принадлежит: Pioneer Corp

The disclosed active vibration noise control device is suitable for use in cancelling out vibration noise by outputting control noise from a plurality of speakers. When a vibration noise frequency is in a dip bandwidth, the active vibration noise control device alters the step size parameters used to update the filter coefficient at at least one filter coefficient update means from among a plurality of filter coefficient update means. Thus, the filter coefficient update speed can be retarded in unstable dip bandwidths, enabling loss in silencing effect which occurs during dip characteristics to be appropriately reduced.

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Номер записи: 16
14-03-2013 дата публикации

Speech enhancement method

Номер: US20130066626A1
Автор: Hsien Cheng Liao
Принадлежит: Industrial Technology Research Institute ITRI

A speech enhancement method is disclosed. The method includes the steps of: receiving a plurality of frames of sound signals by a microphone array; calculating an inter-aural time difference for each frequency band of each frame of the sound signals corresponding to at least one two-microphone set of the microphone array; calculating a plurality of values of cumulative histograms according to the calculated inter-aural time differences; determining a first inter-aural time difference threshold according to the calculated value of the cumulative histograms; and filtering the plurality of frames of sound signals according to the first inter-aural time difference threshold.

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Номер записи: 17
11-04-2013 дата публикации

High Bandwidth Antiresonant Membrane

Номер: US20130087407A1
Автор: Chia-Ming Chang, Geoffrey P. Mcknight
Принадлежит: HRL LABORATORIES LLC

A membrane is disclosed. The membrane contains a first weight disposed at a center portion of the membrane, and a first hinge structure disposed away from the center portion of the membrane.

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Номер записи: 18
18-04-2013 дата публикации

Method and device for improving the audibility, localization and intelligibility of sounds, and comfort of communication devices worn on or in the ear

Номер: US20130094657A1
Автор: Anthony John BRAMMER, Eric Raczka Bernstein
Принадлежит: University of Connecticut

A method and device are provided for maintaining or improving the audibility, localization and/or intelligibility of sounds from electro-acoustic devices worn on the head or in the ear, such as headphones, headsets, hearing protectors, earplugs, and earbuds, as well as in combination with or built into hard hats and helmets, and for improving their comfort to the user.

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Номер записи: 19
16-05-2013 дата публикации

Structure having sound absorption characteristic

Номер: US20130118831A1
Автор: Chie Kato, Junichi Kawai, Satoshi Mihara
Принадлежит: Aisin Chemical Co Ltd

To absorb a noise produced by an external force that generates an audio frequency even if it is applied thereto, and to make it hard to become a noise source to a surrounding area. It includes a surface layer 20 having microscopic pores 21 formed on a surface 20 A, communicating passages 24 communicating with the microscopic pores 21 and a porous layer 10 having sound pores 14 that are formed at an inner part deeper than the surface layer 20 having the microscopic pores 21 formed, communicate with the communicating passage 24 and that have a volume larger than volumes of the microscopic pore 21 formed on the surface 20 A and the communicating passage 24 . A sound absorption characteristic and/or a sound insulation characteristic is provided by the microscopic pores 21 of the surface 20 A, the communicating passages 24 of the porous layer 10 , and the sound pores 14 of the porous layer 10 . Accordingly, sound absorption control including sound insulation in a predetermined audio frequency band can be achieved and a high sound absorption characteristic can be provided.

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Номер записи: 20
23-05-2013 дата публикации

System and method for acoustic noise mitigation in a computed tomography scanner

Номер: US20130129104A1
Автор: Ashutosh Joshi, Joseph James Lacey
Принадлежит: General Electric Co

A CT system is provided that includes an outer housing, a rotatable gantry positioned within the outer housing and having a gantry opening to receive an object to be scanned, an x-ray source mounted on the rotatable gantry and configured to project an x-ray beam toward the object, and a detector array mounted on the rotatable gantry and configured to detect x-ray energy passing through the object and generate a detector output responsive thereto that can be reconstructed into an image of the object. A hybrid noise mitigation system is included in the CT system that is configured to mitigate noise generated by the CT system during operation, the hybrid noise mitigation system comprising a passive noise mitigation device configured to control noise in a passive manner and an active noise mitigation device configured to control noise in an active manner.

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Номер записи: 21
30-05-2013 дата публикации

Active vibration noise control apparatus

Номер: US20130136269A1
Автор: Kosuke Sakamoto, Toshio Inoue
Принадлежит: Honda Motor Co Ltd

An active vibration noise control apparatus cancels out vibration noise generated in the passenger compartment of a vehicle when the vehicle is traveling, by outputting canceling vibration noise. The active vibration noise control apparatus includes a frequency switcher. The frequency switcher calculates a phase angle change between a phase angle in a complex space of a filter coefficient of an adaptive notch filter and a previous phase angle calculated when the filter coefficient is updated previously, and changes a target frequency of a reference signal depending on the calculated phase angle change.

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Номер записи: 22
20-06-2013 дата публикации

Method and arrangement for noise reduction

Номер: US20130156212A1
Автор: Adis Bjelosevic, Peter Isberg, Thomas Karlsson
Принадлежит: SONY MOBILE COMMUNICATIONS AB

An object of the present invention is to improve the functionality of a noise reducer adapted to perform an active noise reduction process. The object is achieved by a noise reducer 300 comprising at least one microphone 310 connected to a noise controller 320, and at least one loudspeaker 330 connected to the noise controller 320. The microphone 310 is arranged at the loudspeaker 330, and the noise controller 320 is adapted to perform an active noise reduction process. An event detector 340 is connected to the noise controller 320 and adapted to send an event 10 detection signal to the noise controller 320, wherein the event detection signal comprises information regarding an external event. The noise controller 320 is further adapted to analyse the event detection signal and to adapted to control the active noise reduction process in dependence of an outcome of the analysis of the event detection signal.

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Номер записи: 23
27-06-2013 дата публикации

Communications Headset Speech-Based Gain Control

Номер: US20130163775A1
Автор: Paul G. Yamkovoy
Принадлежит: Bose Corp

A gain of a signal representing sounds detected by a talk-through and/or feedforward ANR microphone of a talk-through function provided by a communications headset is reduced in response to a user of the communications headset speaking.

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Номер записи: 24
27-06-2013 дата публикации

SOUND OUTPUT DEVICE

Номер: US20130163777A1
Автор: Ito Takayuki, Tashiro Shigeru, UMEMOTO Hiroaki
Принадлежит:

A sound output device for masking an operation sound generated by equipment, having: a sound reproducing unit that starts reproducing a masking sound before the operation sound is generated; and a sound output unit that outputs the masking sound reproduced by the sound reproducing unit. 1. A sound output device for masking an operation sound generated by equipment , comprising:a sound reproducing unit that starts reproducing a masking sound before the operation sound is generated; anda sound output unit that outputs the masking sound reproduced by the sound reproducing unit.2. The sound output device according to claim 1 , wherein after output of the masking sound starts claim 1 , the sound reproducing unit gradually raises an output sound pressure level of the masking sound.3. The sound output device according to claim 1 , wherein claim 1 ,the masking sound is pre-created so as to mask an operation sound generated during a predetermined action of the equipment, andthe sound reproducing unit controls the timing of starting output of the masking sound and the degree of change in output volume of the masking sound, on the basis of a period of time from the equipment starting operation until the predetermined action is performed.4. The sound output device according to claim 1 , wherein claim 1 ,the masking sound is pre-created so as to mask an operation sound generated during a predetermined action of the equipment, andthe equipment performs the predetermined action after a lapse of a predetermined period of time once output of the masking sound starts.5. The sound output device according to claim 1 , wherein claim 1 ,the masking sound is pre-created so as to mask an operation sound generated during a predetermined action of the equipment,the sound reproducing unit constantly reproduces the masking sound at a relatively low sound pressure level, andwhen the equipment starts operating, the sound reproducing unit reproduces the masking sound with the sound pressure level ...

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Номер записи: 25
27-06-2013 дата публикации

Sound output device

Номер: US20130163778A1
Автор: Hiroaki Umemoto, Shigeru Tashiro, Takayuki Ito
Принадлежит: KONICA MINOLTA INC

A sound output device for masking an operation sound generated by equipment, having: a BGM output unit that outputs a BGM; and a masking sound output unit that outputs a masking sound after the BGM output unit outputs the BGM.

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Номер записи: 26
27-06-2013 дата публикации

SOUND OUTPUT DEVICE

Номер: US20130163779A1
Автор: Ito Takayuki, UMEMOTO Hiroaki, Yamaguchi Masahiro
Принадлежит:

A sound output device for masking an operation sound generated by equipment, having: an operation determining unit that determines an operation mode to be executed by the equipment; and a sound output unit that outputs a masking sound on the basis of the operation mode determined by the operation determining unit, the masking sound changing at least in sound pressure level over time. 1. A sound output device for masking an operation sound generated by equipment , comprising:an operation determining unit that determines an operation mode to be executed by the equipment; anda sound output unit that outputs a masking sound on the basis of the operation mode determined by the operation determining unit, the masking sound changing at least in sound pressure level over time.2. The sound output device according to claim 1 , wherein the sound output unit outputs a masking sound that also changes in frequency over time.3. The sound output device according to claim 1 , wherein claim 1 ,when the equipment is operable in a plurality of operation modes, the operation determining unit further determines an operation mode to be executed by the equipment, from among the operation modes, andthe sound output unit outputs masking sounds for their respective operation modes determined by the operation determining unit, the masking sounds change differently in sound pressure level over time.4. The sound output device according to claim 1 , wherein the operation determining unit determines the operation mode to be executed by the equipment claim 1 , on the basis of a user operation or a status of the equipment.5. The sound output device according to claim 1 , further comprising:a memory unit that has stored therein a masking sound corresponding to an operation mode executable by the equipment, the masking sound changing at least in sound pressure level over time; anda sound reproducing unit that reads the masking sound corresponding to the operation mode determined by the operation ...

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Номер записи: 27
18-07-2013 дата публикации

SOUND PROCESSING APPARATUS AND SOUND PROCESSING METHOD

Номер: US20130182866A1
Автор: ISHIBASHI Toshiaki, Kobayashi Eiko
Принадлежит: YAMAHA CORPORATION

A sound processing apparatus includes an inputting section that inputs a sound signal, an analyzing section that analyzes the input sound signal, a storing section that stores a general-purpose masking sound, a masking sound producing section that, based on a result of the analysis by the analyzing section, processes the general-purpose masking sound stored in the storing section to produce an output masking sound, and an outputting section that outputs the output masking sound. 1. A sound processing apparatus comprising:an inputting section that inputs a sound signal;an analyzing section that analyzes the input sound signal;a storing section that stores a general-purpose masking sound;a masking sound producing section that, based on a result of the analysis by the analyzing section, processes the general-purpose masking sound stored in the storing section to produce an output masking sound; andan outputting section that outputs the output masking sound.2. The sound processing apparatus according to claim 1 , wherein the analyzing section extracts a sound feature amount of the input sound signal; andwherein the masking sound producing section processes the general-purpose masking sound stored in the storing section, based on the sound feature amount, to produce the output masking sound.3. The sound processing apparatus according to claim 1 , further comprising:an eliminating section that eliminates the output masking sound from the input sound signal.4. The sound processing apparatus according to claim 1 , further comprising:an analysis result storing section which stores the analysis result for a predetermined time period,wherein the masking sound producing section compares the result of the analysis by the analyzing section with the analysis result stored in the analysis result storing section, and if a different analysis result is calculated therebetween, stops the production of the output masking sound which is based on the result of the analysis by the ...

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Номер записи: 28
18-07-2013 дата публикации

METHOD AND APPARATUS FOR MASKING SPEECH IN A PRIVATE ENVIRONMENT

Номер: US20130185061A1
Автор: ARVANAGHI Babak, FECHTER Joel
Принадлежит: MEDICAL PRIVACY SOLUTIONS, LLC

A speech masking apparatus includes a microphone and a speaker. The microphone can detect a human voice. The speaker can output a masking language which can include phonemes resembling human speech. At least one component of the masking language can have a pitch, a volume, a theme, and/or a phonetic content substantially matching a pitch, a volume, a theme, and/or a phonetic content of the voice. 1. An apparatus , comprising:a microphone configured to detect a voice of a human;a speaker configured to output a masking language, the masking language including phonemes resembling human speech, the phonemes having at least one of a pitch, a volume, a theme, or a phonetic content substantially matching the pitch, the volume, the theme or the phonetic content of the voice;a soundboard located between the microphone and the speaker, the sound board configured to at least partially acoustically isolate the output of the speaker from the microphone.2. The apparatus of claim 1 , wherein the phonemes form intelligible human words.3. The apparatus of claim 1 , wherein the human is a first human claim 1 , the microphone is configured to detect a voice of a second human claim 1 , a first component of the masking language including the phonemes claim 1 , a second component of the masking language having at least one of a pitch claim 1 , a volume claim 1 , a theme claim 1 , or a phonetic content substantially matching a pitch claim 1 , a volume claim 1 , a theme or a phonetic content of the voice of the second human.4. The apparatus of claim 1 , wherein a surface of the soundboard has a concave shape.5. The apparatus of claim 1 , further comprising:a memory storing a plurality of recordings of intelligible human speech; anda processor configured to select a recording from the plurality of recordings such that the theme of the selected recording substantially matches the theme of the voice.6. The apparatus of claim 1 , wherein the phonemes are a first component of the masking ...

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Номер записи: 29
29-08-2013 дата публикации

Splicing of curved acoustic honeycomb

Номер: US20130220731A1
Автор: Burchett Rickey L., Earl Ayle
Принадлежит: Hexcel Corp

Honeycomb sections are bonded together with seams made up of an adhesive that is carried by a honeycomb seam support or a linked-segment seam support. The seams are particularly useful for splicing together curved honeycomb sections that contain acoustic septum. The curved acoustic honeycomb sections are spliced or seamed together to form engine nacelles and other acoustic dampening structures.

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Номер записи: 30
12-09-2013 дата публикации

Radio frequency barrier in a wireless communication network

Номер: US20130237141A1
Автор: Deanna Hong
Принадлежит: Symbol Technologies LLC

A method and system for a radio frequency barrier in a wireless communication network includes a barrier defined for protecting a space within the wireless communication network. A plurality of antennas is located along the barrier. A radio provides radio frequency signals to transmit from the antennas to interfere with radio frequency communications impinging on the barrier. The interfering radio frequency signals can provide same channel and adjacent channel interference.

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Номер записи: 31
19-09-2013 дата публикации

ACTIVE NOISE CANCELLATION SYSTEM

Номер: US20130243214A1
Автор: Penketh Julian, Rashid Abid
Принадлежит: Wolfson Microelectronics plc

A noise cancellation system generates a noise cancellation signal from a signal representing ambient noise by signal processing. The signal processing applies a controllable gain value, and includes a high pass filter with a controllable cut-off frequency. A control block detects a wind amplitude. The cut-off frequency of the high pass filter is controlled based on the detected wind amplitude. A low pass function is applied to the detected wind amplitude, and the controllable gain is adjusted based on the output of the low pass function. 1. A method of controlling a noise cancellation system , wherein the noise cancellation system comprises:an input, for receiving a signal representing ambient noise; anda signal processing block, for generating a noise cancellation signal from the signal representing ambient noise, wherein the signal processing block includes a controllable gain value, and a high pass filter with a controllable cut-off frequency,the method comprising:detecting an amplitude of wind;controlling the cut-off frequency of the high pass filter based on the detected wind amplitude; andapplying a low pass function to the detected wind amplitude, and controlling the controllable gain value based on the output of the low pass function.2. A method as claimed in claim 1 , comprising increasing the cut-off frequency of the high-pass filter when the detected wind amplitude exceeds a first threshold.3. A method as claimed in claim 2 , comprising reducing the cut-off frequency of the high-pass filter when the detected wind amplitude is lower than the first threshold.4. A method as claimed in claim 1 , comprising:reducing the controllable gain value when the detected wind amplitude exceeds a second threshold level for a time that is greater than a first predetermined fraction of a defined time window; andincreasing the controllable gain value when the detected wind amplitude exceeds a second threshold level for a time that is lower than the first predetermined ...

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Номер записи: 32
19-09-2013 дата публикации

Networked sound masking system

Номер: US20130243215A1
Автор: Carl Derla, Klaus Moeller, Mircea Rusu, Niklas Moeller
Принадлежит: Individual

A sound masking system for shaping the ambient noise level in a physical environment. The sound masking system comprises a networked and distributed system having a number of master units coupled together and to a control unit. One or more of the master units may include satellite sound masking units which function to reproduce the sound masking signal generated by the master sound masking unit. Each of the master units is addressable over the network by the control unit enabling the control unit to program the contour, spectral band, and gain characteristics of the sound masking output signal. The system may also include a remote control unit which provides the capability to tune and adjust each master sound masking unit in situ without requiring physical access through the ceiling installation.

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Номер записи: 33
19-09-2013 дата публикации

NOISE REDUCTION APPARATUS AND AUDIO REPRODUCTION APPARATUS

Номер: US20130243225A1
Автор: Yokota Teppei
Принадлежит: SONY CORPORATION

A noise reduction apparatus includes: a speaker with a speaker unit held by holding means to make it possible to mix sounds emitted from front and rear of a vibration plate of the speaker; a microphone provided in an area where the sounds emitted from the front and rear of the vibration plate of the speaker are mixed and cancelled; and means for supplying a noise reduction audio signal obtained by phase-inverting an audio signal collected by the microphone to the speaker. 1. An audio reproduction apparatus comprising:first and second speakers for left and right channels with speaker units held by holding means to make it possible to mix sounds emitted from front and rear of vibration plates of the speakers;first and second microphones provided in areas where the sounds emitted from the front and rear of the vibration plates of the respective first and second speakers are mixed and cancelled;means for supplying noise reduction audio signals obtained by phase-inverting audio signals collected by the first and second microphones to the first and second speakers; andaudio-signal supplying means for supplying predetermined audio signals to the first and second speakers, respectively.2. An audio reproduction apparatus according to claim 1 , wherein the predetermined audio signals supplied from the audio-signal supplying means to the first and second speakers are subjected to virtual sound source processing employing a head related transfer function to cause a listener to listen to sound as if the sound is emitted from other speakers in positions different from positions of the first and second speakers.3. An audio reproduction apparatus comprising:a first speaker arranged near a listener with a speaker unit held by holding means to make it possible to mix sounds emitted from front and rear of a vibration plate of the speaker;a microphone provided in an area where the sounds emitted from the front and rear of the vibration plate of the first speaker are mixed and cancelled ...

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Номер записи: 34
26-09-2013 дата публикации

ACTIVE NOISE CANCELLATION DECISIONS IN A PORTABLE AUDIO DEVICE

Номер: US20130252675A1
Автор: Nicholson Guy C.
Принадлежит:

Active noise cancellation (ANC) circuitry is coupled to the input of an earpiece speaker in a portable audio device, to control the ambient acoustic noise outside of the device and that may be heard by a user of the device. A microphone is to pickup sound emitted from the earpiece speaker, as well as the ambient acoustic noise. Control circuitry deactivates the ANC in response to determining that an estimate of how much sound emitted from the earpiece speaker has been corrupted by noise indicates insufficient corruption by noise. In another embodiment, the ANC decision is in response to determining that an estimate of the ambient noise level is greater than a threshold level of an audio artifact that could be induced by the ANC. Other embodiments are also described and claimed. 1. A portable audio device comprising:an earpiece speaker having an input to receive an audio signal;active noise cancellation (ANC) circuitry coupled to the input of the earpiece speaker to control ambient acoustic noise outside of the device that is heard by a user of the device; andcontrol circuitry to compute strength of an audio artifact present in sound emitted from the earpiece speaker,wherein the control circuitry is to deactivate the ANC circuitry in response to determining that the audio artifact strength is greater than an estimated level of said ambient acoustic noise.2. The portable audio device of further comprising: a first microphone to pickup (a) sound emitted from the earpiece speaker and (b) said ambient acoustic noise,', 'a first filter that models acoustic response at the output of the speaker and pick up by the first microphone, the first filter having an input coupled to receive the audio signal and an anti-noise signal produced by the ANC circuitry,', 'a second filter having a similar frequency response as the first filter, wherein the audio signal is to pass through the second filter, and', 'a differencing unit having a first input coupled to the output of the first ...

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Номер записи: 35
03-10-2013 дата публикации

ACTIVE VIBRATION NOISE CONTROL APPARATUS

Номер: US20130259249A1
Автор: INOUE Toshio, Sakamoto Kosuke
Принадлежит: HONDA MOTOR CO., LTD.

An ANC apparatus using so-called adaptive control is provided with a cancellation sound output means which outputs front wheel cancellation sound that cancels front wheel vibration noise due to front wheel vibration at a position to be silenced on the basis of a front wheel reference signal, and outputs rear wheel cancellation sound that cancels rear wheel vibration noise due to predicted rear wheel vibration at the position to be silenced on the basis of a rear wheel reference signal, and a turning state detection means which detects a turning state of a vehicle. When a difference in travel trajectory between a front wheel and a rear wheel is detected on the basis of the turning state, the cancellation sound output means suppresses the output of the rear wheel cancellation sound. 1. An active vibration noise control apparatus comprising:a font road wheel vibration detecting unit for detecting a front road wheel vibration based on a road input to a front road wheel of a vehicle and outputting a front road wheel reference signal representing the detected front road wheel vibration;a vehicle speed detecting unit for detecting a vehicle speed of the vehicle;a delay time calculating unit for determining a delay time which represents a difference between times at which the front road wheel and a rear road wheel thereof pass through one spot;a rear road wheel reference signal output unit for outputting a rear road wheel reference signal representing a predicted rear road wheel vibration which is a delayed front road wheel vibration for the delay time;a canceling sound output unit for outputting, based on the front road wheel reference signal, a front road wheel canceling sound for canceling a front road wheel vibration noise due to the front road wheel vibration at a sound silent target position, and for outputting, based on the rear road wheel reference signal, a rear road wheel canceling sound for canceling a rear road wheel vibration noise due to the predicted rear ...

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Номер записи: 36
03-10-2013 дата публикации

SYSTEMS, METHODS, AND APPARATUS FOR PRODUCING A DIRECTIONAL SOUND FIELD

Номер: US20130259254A1
Автор: Kim Lae-Hoon, Visser Erik, Xiang Pei
Принадлежит: QUALCOMM INCORPORATED

A system may be used to drive an array of loudspeakers to produce a sound field that includes a source component, whose energy is concentrated along a first direction relative to the array, and a masking component that is based on an estimated intensity of the source component in a second direction that is different from the first direction. 1. A method of signal processing , said method comprising:determining a frequency profile of a source signal;based on said frequency profile of the source signal, producing a masking signal according to a masking frequency profile, wherein the masking frequency profile is different than the frequency profile of the source signal; andproducing a sound field comprising (A) a source component that is based on the source signal and (B) a masking component that is based on the masking signal.2. The method according to claim 1 , wherein said determining the frequency profile of the source signal includes calculating a first level of the source signal at a first frequency and a second level of the source signal at a second frequency claim 1 , andwherein said producing the masking signal is based on said calculated first and second levels.3. The method according to claim 2 , wherein said first level is less than said second level claim 2 , and wherein a level of the masking signal at the first frequency is greater than a level of the masking signal at the second frequency.4. The method according to claim 1 , wherein said masking frequency profile comprises a masking target level for each of a plurality of different frequencies claim 1 , based on the frequency profile of the source signal claim 1 , andwherein the masking signal is based on said masking target levels.5. The method according to claim 4 , wherein at least one of said masking target levels for a frequency among said plurality of different frequencies is based on at least one of said masking target levels for another frequency among said plurality of different frequencies.6. ...

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Номер записи: 37
17-10-2013 дата публикации

Sound pickup device and imaging device

Номер: US20130271647A1
Автор: Yoshio Ohtsuka
Принадлежит: Panasonic Corp

A sound pickup device includes a detector configured to detect attachment of an external apparatus, a sound pickup unit configured to pick up a sound and output a sound signal, and a noise processor configured to, in response to the detection of attachment of an external appliance, add a noise signal to the sound signal output from the sound pickup unit and output the sound signal including the noise signal added thereto.

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Номер записи: 38
31-10-2013 дата публикации

Leakage-modeling adaptive noise canceling for earspeakers

Номер: US20130287218A1
Автор: Jeffrey Alderson, Jon D. Hendrix
Принадлежит: Cirrus Logic Inc

A personal audio device, such as a headphone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio, and the anti-noise signal is combined with source audio to provide an output for a speaker. The anti-noise signal causes cancellation of ambient audio sounds that appear at the reference microphone. A processing circuit uses the reference microphone to generate the anti-noise signal, which can be generated by an adaptive filter. The processing circuit also models an acoustic leakage path from the transducer to the reference microphone and removes elements of the source audio appearing at the reference microphone signal due to the acoustic output of the speaker. Another adaptive filter can be used to model the acoustic leakage path.

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Номер записи: 39
31-10-2013 дата публикации

COORDINATED CONTROL OF ADAPTIVE NOISE CANCELLATION (ANC) AMONG EARSPEAKER CHANNELS

Номер: US20130287219A1
Автор: Alderson Jeffrey, Hendrix Jon D.
Принадлежит: Cirrus Logic, Inc.

A personal audio device including earspeakers, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each earspeaker from at least one microphone signal that measures the ambient audio, and the anti-noise signals are combined with source audio to provide outputs for the earspeakers. The anti-noise signals cause cancellation of ambient audio sounds at the respective earspeakers. A processing circuit uses the microphone signal(s) to generate the anti-noise signals, which can be generated by adaptive filters. The processing circuit controls adaptation of the adaptive filters such that when an event requiring action on the adaptation of one of the adaptive filters is detected, action is taken on the other one of the adaptive filters. Another feature of the ANC system uses microphone signals provided at both of the earspeakers to perform processing on a voice microphone signal that receives speech of the user. 1. A personal audio system , comprising:a first earspeaker for reproducing a first audio signal including both first source audio for playback to a listener and a first anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the first earspeaker;a second earspeaker for reproducing a second audio signal including both second source audio for playback to a listener and a second anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the second earspeaker;at least one microphone for providing at least one microphone signal indicative of the ambient audio sounds; anda processing circuit that generates the first anti-noise signal from the at least one microphone signal using a first adaptive filter to reduce the presence of the ambient audio sounds at the first earspeaker in conformity with the at least one microphone signal, wherein the processing circuit generates the second anti-noise signal from the at least one microphone signal using a second ...

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Номер записи: 40
07-11-2013 дата публикации

AUDIO SYSTEM

Номер: US20130293723A1
Автор: Benson Simon Mark, Bickerstaff Ian Henry
Принадлежит:

An audio system comprises a headset comprising a pair of earpieces positionable with respect to the user's ears so that, in use, the user is inhibited from hearing sounds from the user's environment, at least one of the earpieces having a transducer for reproducing sounds from an input audio signal; a microphone for generating a captured audio signal representing captured sounds from the user's environment; a detector for detecting the presence of any of a set of one or more characteristic sounds in the captured audio signal; and a controller operable to transmit sounds from the user's environment to the user in response to a detection that one or more of the set of characteristic sounds is present in the captured audio signal.

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Номер записи: 41
14-11-2013 дата публикации

Suppression device for outdoor noise in indoor space

Номер: US20130301843A1
Автор: Zhongyi Xu
Принадлежит: Individual

The suppression device for outdoor noises in indoor space solves the technical problems on realizing better sound insulation effect within the room space and creating a quiet atmosphere for people's living environment. The structure includes an anti-noise sound source synchronized to and invert with outdoor noises. The circuit structure of suppression device includes a directional reception and processing circuit for outdoor noises, a attenuation control circuit, a multi-channel digital amplifier circuit, and loudspeaker being installed at the inlet of indoor noises. The directional reception and processing circuit for outdoor noises processes the noise signals collected from the outdoor environment and generates the inverted-phase signals, and then transmits them to the input terminal of attenuation control circuit. After being processed with attenuation by attenuation control circuit, the reverse-phase signals are sent out to input terminal of multi-channel digital amplifier circuit, which then enables the loudspeaker to generate noise compensation signals inverted to outdoor noises. This invention can provide the whole system with noise suppression capability over 28 dB.

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Номер записи: 42
14-11-2013 дата публикации

EAR PLUG DEVICES, METHODS AND KITS FOR THE INDUCTION AND MAINTENANCE OF QUALITY OF SLEEP

Номер: US20130301845A1
Автор: Royal Dennis
Принадлежит:

An ear plug system according to various embodiments can include an ear plug device and an electronic control unit. The ear plug device can be configured to include a white noise component, an ear cover, acupuncture nodes and a headband. The white noise component masks select external noises. The ear cover covers a portion of the user's ear. At least one acupuncture nodules is provided in the ear cover to apply pressure, without penetrating the user's skin. The headband extends at least partially around the user's head and applies compressive force to the ear plug device and the acupuncture nodes to ensure a proper fit and comfort. The electronic control unit wirelessly or directly connects to the ear plug device for controlling the operation of the ear plug device. 1. An ear plug system , comprising: ["a sound producing mechanism configured to produce sounds and transmit the sounds within the user's ear when inserted into the user's ear;", 'a white noise generator included in the sound producing mechanism and configured to generate noise-cancellation sounds in an interior of the ear plug device to mask or cancel select external noises;', "an ear cover to cover a portion of the user's ear;", "at least one acupuncture nodule provided in the ear cover and configured to apply pressure on the user's ear, without penetrating the user's skin; and", "a headgear configured to extend at least partially around the user's head and apply a compressive force to the ear plug device and the acupuncture nodes; and"], "an ear plug device configured to be inserted into a user's ear, comprising:"}an electronic control unit connected to the ear plug device for controlling operation of the ear plug device.2. The system of further comprising a remote control device in wireless or direct communication with the electronic control unit claim 1 , wherein the remote control device is configured to enable the user to set at least one operational parameter of the electronic control unit to ...

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Номер записи: 43
21-11-2013 дата публикации

VEHICLE SOUND ABSORPTION STRUCTURE

Номер: US20130307290A1
Автор: Ide Toyoka
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A vehicle sound absorption structure has: a recessed cell that has an opening on one end of the cell; a divider that is provided within the cell and that divides an acoustic wave entering the cell from the opening into two acoustic waves; reflectors that reflect one of the two acoustic waves divided at the divider and reflect the other acoustic wave respectively toward the opening, and that generate a phase difference between the one acoustic wave and the other acoustic wave; and an interfering portion that is provided within the cell and that causes the one acoustic wave and the other acoustic wave, which have been respectively reflected at the reflectors, to interfere with each other. 119-. (canceled)20. A vehicle sound absorption structure comprising:a recessed cell that has an opening on one end thereof;a divider that is provided within the cell and that divides an acoustic wave entering the cell from the opening into two acoustic waves;reflectors that reflect one of the two acoustic waves divided at the divider and reflect the other acoustic wave respectively toward the opening, and that generate a phase difference between the one acoustic wave and the other acoustic wave;an interfering portion that is provided within the cell and that causes the one acoustic wave and the other acoustic wave, which have been respectively reflected at the reflectors, to interfere with each other; anda cover member that covers the opening and which has a slit provided on an extension of the divider.21. The vehicle sound absorption structure according to claim 20 , wherein:the divider has an end on the side of the opening and positioned more inward in the cell than the opening, while being positioned closer to the opening than one of the reflectors, the one of the reflectors being positioned closer to the opening than the other reflector; andthe interfering portion is positioned between the end and the opening.22. The vehicle sound absorption structure according to claim 21 , ...

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Номер записи: 44
21-11-2013 дата публикации

ACTIVE NOISE REDUCTION

Номер: US20130308785A1
Автор: Christoph Markus
Принадлежит: Harman Becker Automotive Systems GmbH

A noise reducing comprises a first microphone that picks up noise signal at a first location and that is electrically coupled to a first microphone output path; a loudspeaker that is electrically coupled to a loudspeaker input path and that radiates noise reducing sound at a second location; a second microphone that picks up residual noise from the noise and the noise reducing sound at a third location and that is electrically coupled to a second microphone output path; a first active noise reducing filter that is connected between the first microphone output path and the loudspeaker input path; and a second active noise reducing filter that is connected between the second microphone output path and the loudspeaker input path; in which the first active noise reduction filter is a shelving or equalization filter or comprises at least one shelving or equalization filter or both. 1. A noise reducing system comprising:a first microphone that picks up noise at a first location and provides a first sensed signal indicative thereof to a first microphone output path;a loudspeaker that is electrically coupled to a loudspeaker input path and that radiates noise reducing sound at a second location;a second microphone that picks, up residual noise from the noise and the noise reducing sound at a third location and provides a second sensed signal indicative thereof to a second microphone output path;a first active noise reducing filter that is connected between the first microphone output path and the loudspeaker input path; anda second active noise reducing filter that is connected between the second microphone output path and the loudspeaker input path; in whichthe first active noise reduction filter comprises at least one shelving or equalization filter.2. The system of claim 1 , in which the shelving and/or equalization filter comprises at least one of an active or passive analog filter.3. The system of claim 2 , in which the shelving filter has at least a 2nd order filter ...

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Номер записи: 45
21-11-2013 дата публикации

ACTIVE NOISE CANCELLATION APPARATUS

Номер: US20130311040A1
Автор: Hasegawa Koichi, KATAGIRI Akira, OSHIMA Hideki
Принадлежит: TOKAI RUBBER INDUSTRIES, LTD.

Provided is an active noise cancellation apparatus capable of reliably reducing road noise by a technique other than mounting a vibration generator on a floor panel itself or another plate-like interior part itself, while reducing costs and size of the apparatus. A reference signal detector is mounted on a knuckle and the vibration generator is mounted on a wheel housing or a suspension member. An error signal detector detects vibration of the wheel housing or vibration of the suspension member as an error signal, or detects sound in a vehicle interior as an error signal. A controller controls the vibration generator based on the reference signal and the error signal so as to reduce the error signal. 1. An active noise cancellation apparatus for actively reducing noise in an interior of a vehicle , the vehicle generating road noise in the interior of the vehicle by causing a plate-like member of vehicle component parts to vibrate , the plate-like member vibrating by vibration input from road surfaces to a wheel being transmitted to the plate-like member ,wherein the active noise cancellation apparatus comprises:a reference signal detector mounted on a knuckle for supporting the wheel in at least one vibration transmission path from the wheel to the plate-like member and detecting vibration of the knuckle as a reference signal;a vibration generator mounted on a wheel housing or on a suspension member in the vibration transmission path, the wheel housing connected to the plate-like member and supporting a suspension system, the suspension member connected to the plate-like member and constituting the suspension system, and the vibration generator applying vibration force to the wheel housing or the suspension member;an error signal detector for detecting vibration of the wheel housing or vibration of the suspension member as an error signal or detecting sound in the interior of the vehicle as an error signal; anda controller for controlling the vibration generator ...

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Номер записи: 46
28-11-2013 дата публикации

ADAPTIVE EQUALIZER, ACOUSTIC ECHO CANCELLER DEVICE, AND ACTIVE NOISE CONTROL DEVICE

Номер: US20130315408A1
Автор: Awano Tomoharu, Yano Atsuyoshi
Принадлежит: Mitsubishi Electric Corporation

A variable update step size is determined in proportion to a magnitude ratio or magnitude difference between a first residual signal and a second residual signal. The first residual signal is obtained by using adaptive filter coefficient sequence, where the adaptive filter coefficient sequence has been obtained in previous operations of the adaptive equalizer. The second residual signal is obtained by using a prior update adaptive filter coefficient sequence, where the prior update adaptive filter coefficient sequence is obtained by performing a coefficient update with an arbitrary prior update step size on the adaptive filter coefficient sequence having been obtained in previous operations of the adaptive equalizer. 119-. (canceled)20. An adaptive equalizer that generates an output signal by performing a filtering process on an input signal using an adaptive filter coefficient sequence having been subjected to a coefficient update process using a variable update step size , a first residual signal obtained by using adaptive filter coefficient sequence, the adaptive filter coefficient sequence having been obtained in previous operations of the adaptive equalizer; and', 'a second residual signal obtained by using a prior update adaptive filter coefficient sequence, the prior update adaptive filter coefficient sequence being obtained by performing a coefficient update with an arbitrary prior update step size on the adaptive filter coefficient sequence having been obtained in previous operations of the adaptive equalizer., 'wherein the variable update step size is determined based on a magnitude ratio or magnitude difference between21. The adaptive equalizer according to claim 20 , whereinthe second residual signal is a plurality of residual signals obtained by using a plurality of prior update adaptive filter coefficient sequences, the plurality of prior update adaptive filter coefficient sequences being obtained by performing coefficient updates with different ...

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Номер записи: 47
28-11-2013 дата публикации

In-ear active noise reduction earphone

Номер: US20130315411A1
Автор: Anand PARTHASARATHI, Eric M. Wallace, Jason Harlow, Kevin P. Annunziato, Michael Monahan, Ryan C. Silvestri
Принадлежит: Bose Corp

An active noise reduction earphone. The earphone includes structure for positioning and retaining the earphone in the ear of a user without a headband, active noise reduction circuitry including an acoustic driver with a nominal diameter greater than 10 mm oriented so that a line parallel to, or coincident with, an axis of the acoustic driver and that intersects a centerline of the nozzle intersects the centerline of the nozzle at angle θ>±30 degrees. A microphone is positioned adjacent an edge of the acoustic driver. The earphone is configured so that a portion of the acoustic driver is within the concha of a user and another portion of the acoustic driver is outside the concha of the user when the earphone is in position. An opening coupling the nozzle to the environment includes impedance providing structure in the opening.

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Номер записи: 48
28-11-2013 дата публикации

MASKING SOUND GENERATING APPARATUS, STORAGE MEDIUM STORED WITH MASKING SOUND SIGNAL, MASKING SOUND REPRODUCING APPARATUS, AND PROGRAM

Номер: US20130315413A1
Автор: Hata Masato, Koike Mai, Shimizu Yasushi, Yamakawa Takashi
Принадлежит: YAMAHA CORPORATION

Whereas a high masking effect can be secured in a space to which a masking sound is emitted, the degree of a discomfort a person existing in the space suffers can be reduced. In superimposition processing, a CPU extracts sound signals in different intervals of a sound signal X-n of a human voice, superimposes the extracted sound signals on each other on the time axis, and outputs a resulting superimposed sound signal X-n. In shift and addition processing, the CPU 12 interchanges a sound signal, before a reference position, of a sound signal X-n and a sound signal, after the reference position, of the sound signal X-n (shift processing) and outputs a sound signal X-n obtained by adding together a shift-processed sound signal X′-n and the original, non-shift-processed sound signal X-n. 1. A masking sound generating apparatus comprising:an acquiring unit that acquires a sound signal sequence which represents a speech; anda generating unit that includes a superimposing unit which extracts plural sound signal sequences in different intervals of the sound signal sequence and superimposes the extracted sound signal sequences on each other on the time axis,wherein the generating unit generates a masking sound signal from a sound signal sequence obtained through acquirement by the acquiring unit and processing by the superimposing unit.2. The masking sound generating apparatus according to claim 1 , wherein the superimposing unit includes a shifting and adding unit that performs shift processing which is processing of interchanging a sound signal sequence before a reference position in a processing subject sound signal sequence and a sound signal sequence after the reference position in the processing subject sound signal sequence claim 1 , and outputs a sound signal sequence obtained by adding together a shift-processed sound signal sequence and the original claim 1 , non-shift-processed sound signal sequence.3. The masking sound generating apparatus according to claim 1 , ...

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Номер записи: 49
28-11-2013 дата публикации

Speech masking and cancelling and voice obscuration

Номер: US20130317809A1
Автор: John F. Holzrichter
Принадлежит: Lawrence Livermore National Security LLC

A non-acoustic sensor is used to measure a user's speech and then broadcasts an obscuring acoustic signal diminishing the user's vocal acoustic output intensity and/or distorting the voice sounds making them unintelligible to persons nearby.

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Номер записи: 50
05-12-2013 дата публикации

Sound Processing Apparatus

Номер: US20130322644A1
Автор: Takahashi Yu
Принадлежит: YAMAHA CORPORATION

A sound processing apparatus has one or more of processors configured to suppress peaks that exist in a high-order region of a cepstrum of a sound signal and that correspond to a harmonic structure of the sound signal. The processor is further configured to generate a separation mask used to suppress a harmonic component or a nonharmonic component of the sound signal based on a resultant cepstrum in which the peaks of the high-order region have been suppressed. 1. A sound processing apparatus comprising one or more of processors configured to:suppress peaks that exist in a high-order region of a cepstrum of a sound signal and that correspond to a harmonic structure of the sound signal; andgenerate a separation mask used to suppress a harmonic component or a nonharmonic component of the sound signal based on a resultant cepstrum in which the peaks of the high-order region have been suppressed.2. The sound processing apparatus of claim 1 , wherein the processor is further configured to:compute the cepstrum of the sound signal; andapply the separation mask to the sound signal.3. The sound processing apparatus of claim 2 , wherein the processor is configured to:generate, as the separation mask, a harmonic estimation mask capable of suppressing the nonharmonic component of the sound signal and a nonharmonic estimation mask capable of suppressing the harmonic component of the sound signal; andapply the harmonic estimation mask to the sound signal and apply the nonharmonic estimation mask to the sound signal.4. The sound processing apparatus of claim 2 , wherein the processor is configured to:generate, as the separation mask, a harmonic estimation mask capable of suppressing the nonharmonic component of the sound signal;apply the harmonic estimation mask to the sound signal to estimate the harmonic component of the sound signal; andestimate the nonharmonic component of the sound signal by suppressing the estimated harmonic component from the sound signal.5. The sound ...

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Номер записи: 51
19-12-2013 дата публикации

Signal processing apparatus and signal processing method

Номер: US20130336500A1
Автор: Takashi Sudo
Принадлежит: Toshiba Corp

One embodiment provides a signal processing apparatus, including: a speaker; a vibration sensor; and a controller. The speaker is configured to output a sound. The vibration sensor is configured to detect a vibration that is caused by a solid propagation of the sound from the speaker, and to output a reference signal based on the detected variation. The controller is configured to perform a noise suppress control which suppresses a noise due to the vibration using the reference signal.

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Номер записи: 52
26-12-2013 дата публикации

System and Apparatuses that remove clicks for Game controllers and keyboards

Номер: US20130343555A1
Автор: Heiman Arie, Yehuday Uri
Принадлежит:

A system that may include a mechanical element that is movable by a user; a microphone that is arranged to receive sound signals that comprise (a) sound signals of interest and (b) a mechanical noise resulting from a movement of the mechanical element; a mechanical noise reduction module that is arranged to receive or to generate a noise indication that is indicative of an actual or an expected generation of the mechanical noise and to attenuate the mechanical noise in response to the noise indication to provide an attenuated mechanical noise; and a communication module that is arranged to transmit output signals that are representative of the sound signals of interest and the attenuated mechanical noise. 1. A system , comprising:a mechanical element that is movable by a user;a microphone that is arranged to receive sound signals that comprise (a) sound signals of interest and (b) a mechanical noise resulting from a movement of the mechanical element;a mechanical noise reduction module that is arranged to receive or to generate a noise indication that is indicative of an actual or an expected generation of the mechanical noise and to attenuate the mechanical noise in response to the noise indication to provide an attenuated mechanical noise; anda communication module that is arranged to transmit output signals that are representative of the sound signals of interest and the attenuated mechanical noise.2. The system according to claim 1 , comprising a mechanical noise sensing module that is arranged to generate the noise indication.3. The system according to claim 2 , wherein the mechanical noise sensing module is arranged to sense vibrations generated by the movement of the mechanical element and to generate the noise indication in response to the vibrations.4. The system according to claim 3 , wherein the mechanical noise sensing module comprises an accelerometer that is arranged to sense the vibrations.5. The system according to claim 3 , wherein the mechanical ...

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Номер записи: 53
02-01-2014 дата публикации

Noise reduction method, device, and system

Номер: US20140003615A1
Автор: Baosheng Li, Liqian Zhai, Shanjiu Chi
Принадлежит: Huawei Technologies Co Ltd

Embodiments of the present invention provide a noise reduction method, device, and system. In the embodiments of the present invention, operating condition information of a noise source is obtained, where the operating condition information represents an operating condition of the noise source, then sound wave information corresponding to the obtained operating condition information is determined according to a pre-set mapping between the operating condition information and the sound wave information, and active noise reduction is performed by using the corresponding sound wave information. Steps such as collection, conversion, and calculation for noise generated by the noise source are not required, thereby shortening time for the active noise reduction.

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Номер записи: 54
16-01-2014 дата публикации

METHOD FOR MAKING ACOUSTIC HONEYCOMB

Номер: US20140013601A1
Автор: Ayle Earl
Принадлежит: HEXCEL CORPORATION

A method for making an acoustic structure that includes a honeycomb having cells in which septum caps are located. The septum caps are formed from sheets of flexible material that may be perforated before or after the material is inserted into the honeycomb. The flexible material is sufficiently flexible to allow folding into the shape of a septum cap. The flexible material is also sufficiently stiff to provide frictional engagement and locking of the septum cap to the honeycomb cell when the cap is inserted into the honeycomb during fabrication of the acoustic structure. An adhesive is applied to the septum caps after the caps have been inserted into the honeycomb cells to provide a permanent bond. 1. A method for making an acoustic structure , said method comprising the steps of:providing a honeycomb comprising a first edge and a second edge, said honeycomb further comprising a plurality of walls that extend between said first and second edges, said walls defining a plurality of cells wherein each of said cells has a cross-sectional area measured perpendicular to said walls and a depth defined by the distance between said first and second edges;providing at least one sheet of flexible material that has a thickness and a perimeter, said flexible material being sufficiently flexible to be folded into the shape of a septum cap for insertion into said cell, said septum cap having a resonator portion that extends transversely across said cells and which has an outer edge to be located at said walls and a flange portion that is located between said outer edge of said resonator portion and the perimeter of said sheet of acoustic material, said flange portion extending parallel to said walls and comprising an anchoring surface having a width;forming said sheet of flexible material into said septum cap;locating said septum cap into said cell such that said septum cap is held in place only by friction locking of said septum cap to said walls, said anchoring surface being ...

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Номер записи: 55
30-01-2014 дата публикации

ACOUSTIC METAMATERIALS

Номер: US20140027201A1
Автор: Hailat Mohammad, Islam Tofiqul, Newaz Golam
Принадлежит: WAYNE STATE UNIVERSITY

Metamatenal members for absorbing sound and pressure, and modular systems built of metamaterial members are provided. The metamaterial member includes an outer mass. The outer mass can have a cavity formed therein in which a stem coupled to an inner mass is disposed, or the outer mass can be solid and contain an inner mass embedded therein. The inner mass can include an inner core and an outer shell. Multiple metamaterial members can be attached to form a modular system for absorption of sound and pressure. 1. A metamaterial member for absorbing sound or pressure , the metamaterial member comprising:an outer mass having a cavity formed therein, the outer mass having at least one inner edge defining the boundary of the cavity;at least one stem disposed within the cavity and extending from the inner edge; andat least one inner mass disposed within the cavity, the inner mass coupled with the stem and configured to undergo dynamic motion upon application of sound or pressure to the outer mass.2. The metamaterial member of wherein the at least one stem is a plurality of stems.3. The metamaterial member of wherein the plurality of stems includes at least three stem that have a periodic arrangement.4. The metamaterial member of wherein the at least one inner mass is a plurality of inner masses claim 2 , each inner mass of the plurality of inner masses being attached to one stem of the plurality of stems.5. The metamaterial member of wherein each inner mass of the plurality of inner masses is substantially flat or two-dimensional.6. The metamaterial member of wherein a stem-mass member comprises the at least one stem and the at least one inner mass claim 1 , the stem-mass member being attached to the at least one inner edge at at least two different points.7. The metamaterial member of wherein the at least one inner mass is a plurality of inner masses and the at least one stem is attached to at least two masses of the plurality of masses.8. The metamaterial member of ...

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Номер записи: 56
30-01-2014 дата публикации

ACOUSTIC SIGNAL PROCESSING DEVICE, ACOUSTIC SIGNAL PROCESSING METHOD, AND ACOUSTIC SIGNAL PROCESSING PROGRAM

Номер: US20140029758A1
Автор: KUMON Makoto, NAKADAI Kazuhiro, ODA Yasuaki
Принадлежит:

An acoustic signal processing device includes a frequency domain transform unit configured to transform an acoustic signal to a frequency domain signal for each channel, a filter coefficient calculation unit configured to calculate at least two sets of filter coefficients of a filter for each section having a predefined number of frames with respect to a sampled signal obtained by sampling the frequency domain signal transformed by the frequency domain transform unit for each frame such that the magnitude of a residual calculated based on a filter compensating for the difference in transfer characteristics between the channels of the acoustic signal is minimized, and an output signal calculation unit configured to calculate an output signal of a frequency domain based on the frequency domain signal transformed by the frequency domain transform unit and at least two sets of filter coefficients calculated by the filter coefficient calculation unit. 1. An acoustic signal processing device comprising:a frequency domain transform unit configured to transform an acoustic signal to a frequency domain signal for each channel;a filter coefficient calculation unit configured to calculate at least two sets of filter coefficients of a filter for each section having a predefined number of frames with respect to a sampled signal obtained by sampling the frequency domain signal transformed by the frequency domain transform unit for each frame such that the magnitude of a residual calculated based on a filter compensating for the difference in transfer characteristics between the channels of the acoustic signal is minimized; andan output signal calculation unit configured to calculate an output signal of a frequency domain based on the frequency domain signal transformed by the frequency domain transform unit and at least two sets of filter coefficients calculated by the filter coefficient calculation unit.2. The acoustic signal processing device according to claim 1 ,wherein the ...

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Номер записи: 57
06-02-2014 дата публикации

Multi-degree of freedom resonator array

Номер: US20140034416A1
Автор: Zheji Liu
Принадлежит: Dresser Rand Co

Apparatus and methods for attenuating noise, vibration, and/or acoustic energy in a turbomachine. The apparatus includes a first base plate having first base plate perforations defined therethrough. The apparatus also includes first and second spacers each extending from the first base plate, being spaced apart from each other, and defining a first channel therebetween. The apparatus further includes a first insert disposed in the first channel and having insert perforations defined therethrough, the first base plate, the first and second spacers, and the first insert at least partially defining a first acoustic chamber therebetween, wherein the base plate perforations and the insert perforations are in communication with the first acoustic chamber.

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Номер записи: 58
20-02-2014 дата публикации

CLOSED LOOP CONTROL SYSTEM FOR ACTIVE NOISE REDUCTION AND METHOD FOR ACTIVE NOISE REDUCTION

Номер: US20140051483A1
Автор: Schoerkmaier Martin
Принадлежит: ams AG

The invention relates to a closed loop control system for active noise reduction, comprising a speaker and an adding device connected to the speaker. A feedforward control and a feedback control each comprise a microphone for recording noise interference or for recording a sound output by the speaker. Control networks for forming a corresponding control parameter are coupled to the corresponding microphones and are connected to the adding device at the output side thereof According to the invention, the feedback control for noise reduction is adapted on the basis of a first acoustic ratio and the feedforward control for noise reduction is adapted on the basis of a second acoustic ratio.; The control network of the feedback control is designed to at least partially compensate for the control parameter of the feedforward control when current acoustic ratios change in the direction of the first acoustic ratio. 1. A closed loop control system for active noise reduction , comprising:a loudspeaker for outputting sound;an adding device that features a first and a second input and to which the loudspeaker is connected; a first microphone for receiving noise interference, and', 'a first control network with at least one filter for forming a first controlled variable, wherein the first control network is coupled to the first microphone on its input side and is coupled to the adding device on its output side in order to supply the first controlled variable;, 'a feedforward control with'} 'a second microphone for receiving a sound being output by the loudspeaker, and', 'a feedback control with'}a second control network with at least one filter for forming a second controlled variable, wherein the second control network is coupled to the second microphone on its input side and is coupled to the adding device on its output side,wherein the feedback control is tuned to a noise reduction based on a first acoustic ratio, the feedforward control is tuned to a noise reduction based on ...

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Номер записи: 59
27-03-2014 дата публикации

MASKING SOUND GENERATION DEVICE, MASKING SOUND OUTPUT DEVICE, AND MASKING SOUND GENERATION PROGRAM

Номер: US20140086426A1
Автор: Hata Masato, Koike Mai, Yamakawa Takashi
Принадлежит: YAMAHA CORPORATION

There is provided a masking sound output device which prevents interference and an echo even in the case where plural apparatus output the same masking sounds. A masking sound generating unit reproduces each of a disturbing sound, a background sound, and a dramatic sound repeatedly for a prescribed time each time. Return reproduction of each of the disturbing sound and the background sound is started with prescribed timing before it is reproduced fully for the prescribed time. The start timing of the return reproduction varies from one device to another. Unlike the disturbing sound and the background sound, the dramatic sound is not returned halfway; its reproduction timing is adjusted by inserting silent intervals. In particular, the silent interval length of the dramatic sound is varied randomly so that a listener does not recognize the repetition. 1. A masking sound output device comprising:a masking sound generating section that generates a masking sound; anda masking sound output section that outputs the masking sound repeatedly with timing which varies from one device to another.2. The masking sound output device according to claim 1 , wherein the masking sound output section determines the timing using a value which is unique to each device.3. The masking sound output device according to claim 1 , wherein the masking sound is configured by a disturbing sound for disturbing a voice claim 1 , a background sound which is continuous claim 1 , and a dramatic sound which is intermittent;wherein the masking sound output section return-outputs each of the disturbing sound and the background sound after outputting the disturbing sound and the background sound for a time which varies from one device to another; andwherein the masking sound output section outputs the dramatic sound repeatedly while inserting silent intervals whose lengths vary from one device to another.4. The masking sound output device according to claim 3 , wherein the lengths of the silent intervals ...

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Номер записи: 60
03-01-2019 дата публикации

PNEUMATIC TIRE AND TIRE-AND-RIM ASSEMBLY

Номер: US20190001760A1
Автор: Hasegawa Keiichi, KATAYAMA Masahiro, Kouno Yoshihide, MATSUMOTO Yoshifumi
Принадлежит:

In a pneumatic tire, a suppressing member to suppress cavity resonance is fixed to a tire inner face. The suppressing member includes a bulge portion bulging further toward a tire radial direction inner side than the tire inner face so as to provide a space between the bulge portion and the tire inner face. 1. A pneumatic tire comprising:a suppressing member to suppress cavity resonance, the suppressing member being fixed to a tire inner face and including a bulge portion bulging further toward a tire radial direction inner side than the tire inner face so as to provide a space between the bulge portion and the tire inner face.2. The pneumatic tire of claim 1 , wherein a maximum height dimension of the suppressing member in the tire radial direction is 50% or more of a tire cross-section height.3. The pneumatic tire of claim 1 , wherein the suppressing member is formed from a sheet-shaped member.4. The pneumatic tire of claim 3 , wherein a hole is formed penetrating the suppressing member in a thickness direction of the suppressing member.5. The pneumatic tire of claim 1 , wherein the suppressing member is formed from a resin.6. The pneumatic tire of claim 5 , further comprising a tire frame member configured by a resin material.7. A tire-and-rim assembly comprising:a rim; and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the pneumatic tire of mounted to the rim.'}8. The pneumatic tire of claim 1 , wherein:a maximum height dimension of the suppressing member in the tire radial direction is 50% or more of a tire cross-section height, andthe suppressing member is formed from a sheet-shaped member.9. The pneumatic tire of claim 1 , wherein:a maximum height dimension of the suppressing member in the tire radial direction is 50% or more of a tire cross-section height, andthe suppressing member is formed from a resin.10. The pneumatic tire of claim 1 , wherein:the suppressing member is formed from a sheet-shaped member, anda hole is formed penetrating the suppressing ...

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Номер записи: 61
06-01-2022 дата публикации

IN-VEHICLE COMMUNICATION SUPPORT SYSTEM

Номер: US20220005451A1
Автор: Kajikawa Yoshinobu, Tachi Ryosuke
Принадлежит:

A transfer function of a first variable filter is updated to output, from an output of a first seat microphone, a cancel sound that minimizes a level of a signal obtained by subtracting an output of an auxiliary filter that generates a correction signal for correcting a difference between positions of the first seat microphone and the first seat. In the ICC mode in which the uttered voice of the user in the first seat is output from a second seat speaker, a selector sets an uttered voice Dp output from the second seat speaker as an input to the first variable filter, and in the non-ICC mode, the selector sets an output sound of a second seat audio source output from the second seat speaker as an input to the first variable filter. The uttered voice Dp is generated by removing a component of the cancel sound from the output of the first seat microphone. 1. An in-vehicle communication support system mounted on an automobile having a first seat and a second seat which are different seats from each other , the in-vehicle communication support system comprising:a second seat sound source device that is a sound source device of the second seat;a second seat speaker configured to output an output sound of the second seat sound source device, the second seat speaker being a speaker configured for a user at the second seat;a microphone configured to collect sound of the first seat;a noise control unit configured to output a cancel sound and an uttered voice signal;a first seat speaker configured to output a cancel sound output by the noise control unit, the first seat speaker being a speaker configured for a user at the first seat;a selector configured to selectively output, to the noise control unit, one of an output sound of the second seat sound source device or the uttered voice signal output from the noise control unit as a reference sound; anda control unit, an error signal generation unit configured to generate, using an output of the microphone, an error signal ...

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Номер записи: 62
01-01-2015 дата публикации

Reducing ambient noise distraction with an electronic personal display

Номер: US20150003620A1
Автор: James Wu, Yasuyuki Hayashi
Принадлежит: RAKUTEN INC, Rakuten Kobo Inc

A method and system for reducing ambient noise distraction with an electronic personal display is disclosed. One example determines when the electronic personal display is in reader mode. In addition, ambient noise around the electronic personal display is also detected. Noise cancelling sound waves are generated at the electronic personal display for reducing ambient noise distraction. The noise cancelling sound waves are then output from at least one speaker coupled with the electronic personal display.

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Номер записи: 63
07-01-2016 дата публикации

Damping device for a gas turbine, gas turbine and method for damping thermoacoustic oscillations

Номер: US20160003162A1
Автор: Christian Beck, Jaap Van Kampen
Принадлежит: SIEMENS AG

A damping device for a gas turbine has at least one Helmholtz resonator and at least one duct, wherein the Helmholtz resonator has a resonator housing and at least one resonator neck pipe and the resonator housing encloses a resonance volume of the Helmholtz resonator, into which volume acoustic vibrations can be injected by means of the resonator neck pipe. The damping device enables a particularly effective damping of thermo-acoustic vibrations. For this purpose, the duct is formed with a duct jacket and at least one outlet opening. Acoustic vibrations of a fluid stream flowing through a burner plenum and a combustion chamber can be injected into the outlet opening. A cooling fluid can be applied to the duct and the at least one resonator neck pipe opens on the hot-gas side into such a duct upstream of the at least one outlet opening.

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Номер записи: 64
04-01-2018 дата публикации

SOUNDPROOF STRUCTURE AND SOUNDPROOF STRUCTURE MANUFACTURING METHOD

Номер: US20180002919A1
Автор: HAKUTA Shinya, Kasamatsu Tadashi, NAYA Masayuki, YAMAZOE Shogo
Принадлежит: FUJIFILM Corporation

A soundproof structure includes one or more soundproof cells. Each of the one or more soundproof cells includes a frame having a hole portion, a vibratable film fixed to the frame so as to cover the hole portion, and one or more through holes drilled in the film. Both end portions of the hole portion of the frame are not closed, and the frame and the film are formed of the same material and are integrally formed. Therefore, it is possible to provide a soundproof structure and a soundproof structure manufacturing method capable of not only stably insulating sound due to increased resistance to environmental change or aging but also avoiding problems in manufacturing, such as uniform adhesion or bonding of a film to a frame. 1. A soundproof structure , comprising:one or more soundproof cells, a frame having a hole portion,', 'a vibratable film fixed to the frame so as to cover the hole portion, and', 'one or more through holes drilled in the film,, 'wherein each of the one or more soundproof cells comprises'}both end portions of the hole portion of the frame are not closed, andthe frame and the film are formed of the same material, and are integrally formed.2. The soundproof structure according to claim 1 ,wherein the one or more soundproof cells are a plurality of soundproof cells arranged in a two-dimensional manner.3. The soundproof structure according to claim 1 , further comprising:a weight disposed in the film.4. The soundproof structure according to claim 3 ,wherein the weight is formed of the same material as the film, and is integrally formed.5. The soundproof structure according to claim 1 ,wherein the soundproof structure has a shielding peak frequency, which is determined by opening portions of the one or more soundproof cells and at which transmission loss is maximized, on a lower frequency side than a resonance frequency of the films of the one or more soundproof cells, and selectively insulates sound in a predetermined frequency band having the ...

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Номер записи: 65
13-01-2022 дата публикации

INFANT INCUBATOR

Номер: US20220008277A1
Автор: Du Lilin, Hutchinson George Martin
Принадлежит:

Systems and methods are provided for an infant incubator having features for active noise cancellation, including enclosure designs, positioning systems, and error sensor selection. 1. An active noise control system comprising:an enclosure;one or more reference input sensors disposed outside of the enclosure;an error sensor array comprising one or more error sensors disposed within the enclosure;a positioning detection system;one or more speakers disposed within the enclosure; anda processing unit in data communication with the one or more reference input sensors, the error sensor array, the positioning detection system, and the one or more speakers,wherein the one or more reference input sensors generate one or more reference input signals in response to one or more noise sound waves generated by one or more noise sources;wherein the positioning detection system generates target position data, and wherein the processing unit is configured to receive the target position data and determine a position of a target quiet zone;wherein the processing unit selectively chooses one or more error sensors of the error sensor array to determine a target zone sensor array;wherein the processing unit is configured to execute an adaptive noise control algorithm in response to the reference control signal received from the one or more reference input sensors and an error signal received from the target zone sensor array, and wherein the adaptive noise control algorithm generates an output control signal for the speakers to generate a control sound wave configured to destructively interfere with the noise sound waves when the noise sound waves enter the enclosure.2. The active noise control system of claim 1 , wherein the enclosure is an infant incubator.3. The active noise control system of claim 2 , wherein the positioning detection system is configured to determine the position of a human subject within the infant incubator.4. The active noise control system of claim 1 , wherein ...

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Номер записи: 66
05-01-2017 дата публикации

Noise cancelation system and techniques

Номер: US20170004818A1
Автор: Chidananda Khatua
Принадлежит: Zpillow Inc

Techniques for noise cancelation include an automated method having the steps of: receiving signals from a plurality of microphones positioned within a microphone array outside a target area; identifying, from the received signals, a noise and position information for a source for the noise external to the target area before the noise reaches the target area; before the noise reaches the target area, determining a cancelation sound for the noise based on the noise and the position information; and playing the cancelation sound as the noise reaches the target area so as to significantly cancel the noise within the target area.

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Номер записи: 67
07-01-2021 дата публикации

Passive Balancing of Electroacoustic Transducers for Detection of External Sound

Номер: US20210005175A1
Автор: Mallinson A. Martin, Petersen Christian Leth, SCARLETT SHAWN WILLIAM
Принадлежит:

A system and method for passively balancing electroacoustic transducers so that sounds other than the transducer's output can be detected. A transducer producing audio output based upon an input audio signal can operate in reverse to produce a signal in response to the impact of external sound upon the transducer from another source. This “reverse” or “microphone” signal represents the sound from the other source. Transducers are operated in monophonic mode, each in opposite polarity to the other thus canceling out and leaving only the microphone signal created by the transducers, i.e., a signal representing the external sound. The microphone signal can be amplified, and can be filtered and processed to identify and/or obtain various types of information about the sound received by the transducers. 1. A method of using electroacoustic transducers to detect an environmental sound received by but not produced by the electroacoustic transducers , comprising:receiving a monophonic audio signal;providing the monophonic audio signal to a first voice coil, the first voice coil driving a first diaphragm;inverting the monophonic audio signal;providing the inverted monophonic audio signal to a second voice coil, the second voice coil driving a second diaphragm; andreceiving at a common electrical point coupled to the first and second voice coils the monophonic audio signal and the inverted monophonic audio signal, causing the monophonic audio signal and the inverted monophonic audio signal to cancel out thereby creating a residual output signal that represents the environmental sound received by the first and second diaphragms.2. The method of further comprising amplifying the residual output signal.3. The method of further comprising amplifying the monophonic audio signal before providing the monophonic audio signal to the first voice coil claim 1 , and amplifying the inverted monophonic audio signal before providing the inverted monophonic audio signal to the second voice ...

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Номер записи: 68
04-01-2018 дата публикации

APPARATUS AND METHOD FOR MOUNTING A SOUND MASKING DEVICE IN A HOTEL ROOM

Номер: US20180005621A1
Автор: Moeller Niklas
Принадлежит:

An apparatus and method for mounting a sound masking component or device to an existing electronic component, appliance, or a furnishing installed or located in a hotel room or other interior space. According to an embodiment, the existing electronic component or appliance comprises a television set. The television set includes a pre-existing mounting mechanism for attaching a television wall-mounting bracket. The sound masking component further includes a mounting bracket wherein the mounting bracket is configured to be secured to the pre-existing mounting mechanism on the television set. According to another embodiment, the sound masking component is mounted internally inside the television set and configured to receive power from the television power supply and emit a sound masking signal utilizing a television speaker or a separate sound masking speaker. 120-. (canceled)21. A sound masking device suitable mounting on a rear surface of a television set installed in a hotel room , said sound masking device comprising:a sound masking component;a mounting bracket configured for attaching and supporting said sound masking component;the television set having a rear surface and including a wall mounting mechanism for attaching a television wall mounting bracket, the wall mounting mechanism comprising a plurality of wall mounting bracket holes according to an industry standard;said mounting bracket comprising a plurality of mounting holes, and said plurality of mounting holes having a spacing and configuration with at least one of said plurality of mounting holes is aligned with at least one of said plurality of wall mounting bracket holes, so that said sound masking component is mountable on the rear surface of the television without modification; andsaid sound masking component comprising an enclosure, said enclosure having a profile configured to allow said sound masking component to fit between the rear surface of the television and a surface adjacent the rear ...

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Номер записи: 69
02-01-2020 дата публикации

INVISIBLE SOUND BARRIER

Номер: US20200005756A1
Автор: IIZUKA Hideo, Lee Taehwa
Принадлежит:

An invisible sound barrier includes a periodic array of spaced apart, columnar unit cells. Each unit cell includes a pair of joined, and inverted, columnar Helmholtz resonators, having neck portions that point in opposite directions. Each of the Helmholtz resonators can be formed of a sound absorbing material and coated with a light reflective material causing light to reflect around the resonators, thereby conferring invisibility. Each of the Helmholtz resonators can alternatively be formed of a light reflecting material, and positioned in between vertical mirrors, with a transparent material filling space between the resonators and the vertical mirrors. 1. An invisible sound barrier comprising a one-dimensional periodic array of unit cells spaced apart by a lateral midpoint-to-midpoint distance P , each unit cell having a maximum lateral dimension W , wherein P is greater than W , and each unit cell comprising: a hollow columnar structure formed of a solid sound reflecting material and having a cross-sectional shape defining an equilateral parallelogram with an outer dimension and a first internal chamber portion of a first volume; and', 'a first neck forming an opening on a first side of the first Helmholtz resonator and placing the first internal chamber portion in fluid communication with an ambient environment; and, 'a first Helmholtz resonator having a hollow columnar structure formed of a solid sound reflecting material and having a cross-sectional shape defining an equilateral parallelogram with an outer dimension identical to that of the first Helmholtz resonator and a second internal chamber portion of a volume greater than the first volume; and', 'a second neck, forming an opening on a second side of the second Helmholtz resonator that is opposite the first side of the first Helmholtz resonator, and placing the second internal chamber portion in fluid communication with the ambient environment; and, 'a second Helmholtz resonator havinga light reflecting ...

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Номер записи: 70
02-01-2020 дата публикации

Soundproof structure

Номер: US20200005757A1
Автор: Akihiko Ohtsu, Shinya Hakuta, Shogo Yamazoe, Yoshihiro Sugawara
Принадлежит: Fujifilm Corp

There is provided a soundproof structure that is small and has high soundproofing performance with respect to sound in a low frequency band. At least one soundproof cell including a frame having a hole portion and a film fixed to the frame is provided. The film has a surface density distribution. Assuming that a shortest line segment length between high surface density regions and between the high surface density regions and end portions of the hole portions is Δd, a longest line segment length between the end portions of the hole portions is L [m], a Young's modulus of a material of the low surface density region is E [Gpa], an average film thickness of the low surface density region is h [m], and a maximum surface density and a minimum surface density of the film are ρmax and ρmin, a parameter X in the following Equation (1) satisfies the following Inequality (2). X=Eh 2 /(ρmax/ρmin) [N]  (1) (Δ d/L −0.025)/(0.06) [N]≤ X [N]≤10 [N]  (2)

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Номер записи: 71
02-01-2020 дата публикации

SYSTEM AND METHOD FOR CALIBRATING AND TESTING AN ACTIVE NOISE CANCELLATION (ANC) SYSTEM

Номер: US20200005759A1
Автор: Alderson Jeffrey, COAPSTICK RONALD, LI NING
Принадлежит:

A method for calibrating an ANC-enabled portable audio device having microphones plays continuously a calibration sound by a calibrated speaker of a test station separate from the device. For each microphone of all the microphones, a microphone calibration value is computed using a comparison of a predetermined level and a measured level of an audio signal transduced by the microphone in response to the continuously-played calibration sound. The calibration is done without using a microphone of the test station. A processing element of the device may be programmed to make the comparison and computation. The processing element also causes a speaker of the device to generate a second calibration sound, measures a second level while the computed calibration value is applied to one of microphones (e.g., error microphone), and computes a calibration value for the device speaker using a comparison of a predetermined level and the second level. 1. A method for calibrating an active noise cancellation (ANC)-enabled portable audio device having microphones , comprising:playing continuously a calibration sound by a calibrated speaker of a test station that is separate from the portable audio device; measuring a level of an audio signal transduced by the microphone in response to the continuously-played calibration sound;', 'making a comparison of a predetermined level and the measured level; and', 'computing a calibration value for the microphone using the comparison;, 'for each microphone of all the microphones of the portable audio devicewherein said measuring, said making the comparison and said computing the calibration value are performed for all of the microphones of the portable audio device without using a microphone of the test station; andwherein said measuring, said making the comparison and said computing the calibration value are performed for all of the microphones of the portable audio device in response to the continuously-played calibration sound.2. The ...

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Номер записи: 72
02-01-2020 дата публикации

ACTIVE NOISE REDUCTION DEVICE AND ACTIVE NOISE REDUCTION METHOD

Номер: US20200005760A1
Автор: TAO Masafumi, Yamanashi Tomofumi
Принадлежит:

An active noise reduction device includes a standard signal generator, an adaptive filter unit, a control sound output unit, and an error signal detector. The adaptive filter unit includes a control signal generator, a filter coefficient update unit, and a step size setting unit. The control signal generator multiplies a standard signal by a filter coefficient to generate a control signal. Based on a reference signal and an error signal, the filter coefficient update unit updates the filter coefficient so as to minimize the error signal. The step size determiner sets a step size parameter indicating an update amount of the filter coefficient. The filter coefficient update unit sets a step size adjustment coefficient for adjusting the step size parameter based on an audio information feature amount and a change of the control signal. 1. An active noise reduction device that actively reduces a noise at a control point in a vehicle by causing a control sound to interfere with a control target sound , the control target sound being generated from a noise source and exhibiting periodicity , the active noise reduction device comprising:a standard signal generator that generates and outputs a standard signal correlated with the control target sound;an adaptive filter that generates a control signal based on the standard signal outputted and an audio information feature amount relating to an audio signal reproduced in the vehicle;a control sound output unit that outputs a control sound corresponding to the control signal; andan error signal detector that collects a residual noise caused by interference between the control target sound and the control sound at the control point, and outputs an error signal corresponding to the residual noise,wherein a reference signal generator that generates a reference signal based on the standard signal input to the adaptive filter unit;', 'a control signal generator that generates the control signal by multiplying the standard signal by ...

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Номер записи: 73
03-01-2019 дата публикации

NOISE REDUCTION DEVICE AND PRINTED CIRCUIT ASSEMBLY INCLUDING THE SAME

Номер: US20190005939A1
Автор: CHEN Mu-Chi
Принадлежит:

A printed circuit assembly includes a printed circuit board, a processor, an oscillator and a noise reduction device. The printed circuit board has a ground connecting portion. The processor is disposed on the printed circuit board. The oscillator is disposed on the printed circuit board. The noise reduction device includes a wave absorber, a blocking sheet and an electrically conductive member. The wave absorber includes a processor covering part and an oscillator covering part. The oscillator covering part protrudes from one side of the processor covering part. The processor covering part and the oscillator covering part respectively cover the processor and the oscillator. The blocking sheet is stacked on the oscillator covering part to cover the oscillator. One end of the electrically conductive member is connected to the blocking sheet, and another end of the printed circuit board is connected to the ground connecting portion. 1. A noise reduction device , comprising:a wave absorber, comprising a processor covering part and an oscillator covering part, and the oscillator covering part protruding from one side of the processor covering part;a blocking sheet, stacked on the oscillator covering part; andan electrically conductive member, one end of the electrically conductive member connected to the blocking sheet, and another end of the electrically conductive member configured to be connected to ground.2. The noise reduction device according to claim 1 , wherein the wave absorber absorbs electromagnetic waves with a frequency ranging from 800 to 1000 megahertz (MHz).3. The noise reduction device according to claim 1 , wherein the wave absorber is electrically insulated.4. The noise reduction device according to claim 1 , wherein the blocking sheet is an aluminum foil.5. The noise reduction device according to claim 1 , wherein the blocking sheet is located within edges of the oscillator covering part.6. The noise reduction device according to claim 5 , wherein a ...

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Номер записи: 74
07-01-2016 дата публикации

HEARING AID AND FEEDBACK CANCELLER

Номер: US20160007126A1
Автор: SUNOHARA Masahiro
Принадлежит: RION CO., LTD.

A hearing aid according to an embodiment of the present disclosure includes: a microphone configured to convert sound into an electric signal and output a first signal; a receiver configured to convert the third signal that is generated by performing predetermined hearing aid processing on a second signal, into sound; a first feedback removal unit having an adaptive filter configured to adaptively estimate a first transfer function of a sound feedback path from the receiver to the microphone; and a second feedback removal unit having a fixed filter configured to receive the third signal and use a fixed filter coefficient based on a second transfer function of a vibration feedback path from the receiver to the microphone. The second signal is generated by removing from the first signal, output signals from the adaptive filter and the fixed filter.

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Номер записи: 75
20-01-2022 дата публикации

SOUND INSULATION SHEET MEMBER AND SOUND INSULATION STRUCTURE USING SAME

Номер: US20220018120A1
Автор: AKASAKA SHUICHI, KOGA Shogo
Принадлежит: MITSUBISHI CHEMICAL CORPORATION

An object of the present invention is to provide a sound insulating sheet member that has high sound-insulating performance which exceeds mass law while being relatively light weight, that is highly flexible in design, excellent in versatility, and easy to manufacture so that productivity and economic efficiency can be improved, and a sound insulating structural body or the like using the same. The object thereof is achieved by using a sound insulating sheet member comprising at least a sheet having rubber elasticity and a plurality of resonant portions, wherein the resonant portions are provided in contact with a sheet surface of the sheet, each of the resonant portions including a base part and a weight part, and the weight part being supported by the base part and having a larger mass than the base part. 1. A sound insulating structural body comprising a sound insulating sheet member and a support body ,the sound insulating sheet member comprising a sheet having rubber elasticity and a plurality of resonant portions,wherein the resonant portions are provided in contact with a sheet surface of the sheet, each of the resonant portions including a base part and a weight part, and the weight part being supported by the base part and having a larger mass than the base part,wherein the support body is provided in contact with at least one surface of the sheet of the sound insulating sheet member, and supports the sheet, andwherein the support body has a Young's modulus of 1 GPa or more.2. The sound insulating structural body according to claim 1 , wherein the sheet comprises at least one selected from a group consisting of thermosetting or photocurable elastomers and thermoplastic elastomers.3. The sound insulating sheet member according to claim 1 , wherein the sheet has a Young's modulus of from 0.01 MPa to 100 MPa.4. The sound insulating structural body according to claim 1 , wherein the base part comprises at least one selected from a group consisting of ...

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Номер записи: 76
20-01-2022 дата публикации

FAN SILENCING SYSTEM

Номер: US20220018363A1
Автор: HAKUTA Shinya, OHTSU Akihiko, YAMAZOE Shogo
Принадлежит: FUJIFILM Corporation

A fan silencing system includes a fan, and an acoustic resonance structure, in which the acoustic resonance structure is disposed in a near field region of a sound generated by the fan. 1. A fan silencing system comprising:a fan; andan acoustic resonance structure,wherein the acoustic resonance structure is disposed in a near field region of a sound generated by the fan.2. The fan silencing system according to claim 1 ,wherein a resonance frequency of the acoustic resonance structure coincides with at least one frequency of discrete frequency sounds caused by a rotation of a blade of the fan.3. The fan silencing system according to claim 1 ,wherein, as viewed from a direction perpendicular to a blowing port of the fan, an area in which the acoustic resonance structure overlaps with the blowing port is 50% or less of an area of the blowing port.4. The fan silencing system according to claim 2 ,wherein, as viewed from a direction perpendicular to a blowing port of the fan, an area in which the acoustic resonance structure overlaps with the blowing port is 50% or less of an area of the blowing port.5. The fan silencing system according to claim 1 ,wherein the acoustic resonance structure constitutes a part of a wall surface of a ventilation passage connected to the fan.6. The fan silencing system according to claim 2 ,wherein the acoustic resonance structure constitutes a part of a wall surface of a ventilation passage connected to the fan.7. The fan silencing system according to claim 3 ,wherein the acoustic resonance structure constitutes a part of a wall surface of a ventilation passage connected to the fan.8. The fan silencing system according to claim 1 ,wherein a surface provided with a vibrating body of the acoustic resonance structure is disposed in parallel to an axis perpendicular to a blowing port of the fan.9. The fan silencing system according to claim 2 ,wherein a surface provided with a vibrating body of the acoustic resonance structure is disposed in ...

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Номер записи: 77
07-01-2021 дата публикации

CLUSTERS OF UNDERWATER SEISMIC SOURCES

Номер: US20210006894A1
Автор: Morozov Andrey K.
Принадлежит:

A submersible sound system may include a housing, an end piece, an elastic membrane, an end cap affixed to the elastic membrane, and a subwoofer speaker system disposed within the housing and supported by a speaker support. A bubble sound source may be defined by the speaker support, the speaker diaphragm, an anterior end of the housing, the elastic membrane, and the end cap. The housing, end piece, and a posterior surface of the speaker support may form a sealed enclosure. The sound system may include a tuning pipe disposed between the sealed enclosure and the bubble sound source. A Helmholtz resonator may be disposed anteriorly of the speaker system. Multiple sound system may be assembled to form a cluster. The cluster may be defined by the vertices of regular polyhedron. The sound systems may be controlled to maintain the speaker systems within acceptable thermal limits. 110-. (canceled)11. The underwater sound system of claim 18 , wherein each of the plurality of sound sources further comprises: a processor;', 'a memory unit in data communication with the processor;', 'a controllable power source in electrical communication with the voice coil of the sound source; and', 'an interface configured to receive sensor input data from the subwoofer speaker system of the sound source;', receive the sensor input data from the subwoofer speaker system; and', 'control the power source based on the received sensor input data., 'wherein the memory unit stores instructions that, when executed by the processor, cause the processor to], 'a control system comprising12. The underwater sound system of claim 11 , wherein the subwoofer speaker system of each of the plurality of sound sources comprises a first temperature sensor of a first temperature of fluid surrounding the magnet assembly and a second temperature sensor of a second temperature of the voice coil.13. The underwater sound system of claim 12 , wherein the second temperature sensor is an IR temperature sensor.14. The ...

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Номер записи: 78
02-01-2020 дата публикации

Commercial Lighting Integrated with Loudspeakers for Sound Masking, Paging or Music

Номер: US20200007968A1
Автор: Bursal Faruk, Calisi Christopher, Cook Gordon V., Fleming Robert, Saunders Gregory
Принадлежит:

A commercial lighting system, the system comprising, an integral housing adapted to be coupled to a ceiling of a building, a lighting unit mounted to the integral housing and a loudspeaker assembly mounted to the integral housing, the loudspeaker assembly comprising a low directivity index, and oriented to provide an acoustic sound signal from the integral housing to a listener in an area of the building comprising the ceiling. 1. A commercial lighting system , the system comprising:an integral housing adapted to be coupled to a ceiling of a building;a lighting unit mounted to the integral housing; anda loudspeaker assembly mounted to the integral housing, the loudspeaker assembly comprising a low directivity index, and oriented to provide an acoustic sound signal from the integral housing to a listener in an area of the building comprising the ceiling.2. The commercial lighting system of wherein the loudspeaker assembly is operative to emit the acoustic sound signal corresponding to an electrical sound signal claim 1 , the electrical sound signal comprising at least one of a sound masking signal claim 1 , a music signal and a paging signal.3. The commercial lighting system of wherein the loudspeaker assembly comprises a voice coil coupled to an audio emitter operative to emit the acoustic sound signal corresponding to the electrical sound signal claim 2 , the audio emitter comprising a cone emitter.4. The commercial lighting system of wherein at least part of the lighting unit is positioned to deflect the acoustic sound signal claim 1 , emitted from the loudspeaker assembly claim 1 , prior to reaching the listener in the area of the building.5. The commercial lighting system of wherein the loudspeaker assembly is oriented to provide the acoustic sound signal in a direct path to the listener.6. The commercial lighting system of wherein the loudspeaker assembly comprises a direct field sound masking loudspeaker assembly.7. The commercial lighting system of wherein ...

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Номер записи: 79
02-01-2020 дата публикации

System and Method for Configuring Audio Signals to Compensate for Acoustic Changes of the Ear

Номер: US20200007973A1
Автор: Dennis Rauschmayer
Принадлежит: Revx Technologies Inc

Personal speaker systems including headset and earbud systems may be configured to capture audio data using an in-ear microphone while a speaker outputs known audio signals into the ear canal. The system may generate an acoustic model of the compressed ear canal and ear drum of the listener and utilize the acoustic model to provide noise cancelation at the eardrum, modification to the audio to result in a more natural sound at the eardrum, and/or to measure leakage of the personal speaker system.

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Номер записи: 80
27-01-2022 дата публикации

PULSATING COMBUSTION DEVICE WITH IMPROVED ENERGY CONVERSION EFFICIENCY AND REDUCED NOISE LEVEL

Номер: US20220026059A1
Автор: VAKUTIN Andrey Alekseevich, YAMILEV Ilgiz
Принадлежит:

This invention refers to the energy sector and can be applied in heating systems, in particular in water heaters or boilers; in disposal systems operating on associated gas flaring. The pulsating combustion device comprises a combustion chamber and, connected thereto, an air and fuel gas supply unit and a flue duct. Said flue duct comprises at least one resonance pipe connected to the combustion chamber and at least two Helmholtz resonators located successively downstream of the at least one resonance pipe. Each of said resonators consists of a flue chamber and a flue pipe arranged downstream thereof, and natural resonance frequency of each of the Helmholtz resonators is less than combustion pulsation frequency. The invention allows to increase the pulsating combustion device efficiency with a simultaneous reduction of the noise level. 135-. (canceled)36. A pulsating combustion device comprising a combustion chamber and , connected thereto , an air and fuel gas supply unit and a flue duct , said flue duct comprising at least one resonance pipe connected to the combustion chamber and at least two Helmholtz resonators located successively downstream of the at least one resonance pipe , each of said resonators comprising a flue chamber and a flue pipe arranged downstream thereof , and natural resonance frequency of each of the Helmholtz resonators is less than combustion pulsation frequency.37. The device according to claim 36 , wherein there are at least three said Helmholtz resonators of which at least one Helmholtz resonator is connected to the flue chamber of the third downstream Helmholtz resonator by means of a second flue pipe bypassing the next downstream Helmholtz resonator.38. The device according to claim 36 , wherein at least one resonance pipe is connected to the first Helmholtz resonator through a low-pass acoustic filter having a cut-off frequency higher than the combustion pulsation frequency.39. The device according to claim 36 , wherein an element ...

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Номер записи: 81
09-01-2020 дата публикации

VEHICLE WHEEL

Номер: US20200009905A1
Автор: KAMIYAMA Youichi, OSAWA Yusuke, SAITO Toshinobu
Принадлежит:

A vehicle wheel includes: a wheel having a rim; a sub-air chamber member serving as a Helmholtz resonator; and a support member integrated with the sub-air chamber member and joined to the rim. The sub-air chamber member is made of a synthetic resin. The support member is made of a metal. 1. A vehicle wheel , comprising:a wheel having a rim;a sub-air chamber member serving as a Helmholtz resonator, the sub-air chamber member being made of a synthetic resin; anda support member integrated with the sub-air chamber member and joined to the rim, the support member being made of a metal.2. The vehicle wheel according to claim 1 , whereinthe support member is insert molded in the sub-air chamber member. The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2018-129705, filed Jul. 9, 2018, the contents of which are hereby incorporated by reference in their entirety.The present invention relates to a vehicle wheel.There has been known a wheel including a well portion and a Helmholtz resonator (sub-air chamber member) that is attached to the well portion and cancels air column resonance noises in a tire air chamber (e.g., see Japanese Patent No. 4551422). The sub-air chamber member of the wheel is a resin molded product, and has two sides which are opposite to each other in a wheel width direction and on each of which an elastically deformable plate-shaped edge portion is formed.This sub-air chamber member is attached to the well portion by the edge portions being respectively fitted into groove portions formed on rising walls of the well portion.In general, a sub-air chamber member can be attached to a wheel by various methods such as adhering, welding, or fastening with bolts and the like, in addition to the fitting method described above. The attachment of the sub-air chamber member to the wheel has to be firm enough to withstand a great centrifugal force that can be applied to the sub-air chamber member during wheel rotation. ...

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Номер записи: 82
09-01-2020 дата публикации

VEHICLE WHEEL

Номер: US20200010029A1
Автор: KAMIYAMA Youichi, OSAWA Yusuke, SAITO Toshinobu
Принадлежит:

A vehicle wheel includes: a rim including a well portion with an outer circumferential surface, the well portion having a recessed portion formed on the outer circumferential surface; a sub-air chamber member serving as a Helmholtz resonator; and a joining member including a joining portion disposed in the recessed portion. The sub-air chamber member is attached to the outer circumferential surface of the well portion via the joining member. 1. A vehicle wheel , comprising:a rim including a well portion with an outer circumferential surface, the well portion having a recessed portion formed on the outer circumferential surface;a sub-air chamber member serving as a Helmholtz resonator; anda joining member including a joining portion disposed in the recessed portion,wherein the sub-air chamber member is attached to the outer circumferential surface of the well portion via the joining member.2. The vehicle wheel according to claim 1 ,wherein the sub-air chamber member comprises:a bottom plate disposed on the outer circumferential surface of the well portion;an upper plate that together with the bottom plate forms a sub-air chamber between the upper plate and the bottom plate; anda bridge having a circular cylindrical shape and connecting between the bottom plate and the upper plate, andwherein the joining member extends in the bridge.3. The vehicle wheel according to claim 1 ,wherein the joining portion is formed of a cured resin cured and molded in the recessed portion.4. The vehicle wheel according to claim 1 ,wherein the recessed portion is a threaded hole, andwherein the joining member is a screw member having, as the joining portion, a threaded portion engaged with the threaded hole. The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2018-129704, filed Jul. 9, 2018, the contents of which are hereby incorporated by reference in their entirety.The present invention relates to a vehicle wheel.There has been known a wheel ...

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Номер записи: 83
27-01-2022 дата публикации

NOISE CANCELLATION APPARATUS AND METHOD

Номер: US20220030349A1
Автор: Fan Fan, LI Jiang, Li Yulong, Ou Yangshan, QIN Jingfan, Yang Xiaohong, Yu Xiaowei
Принадлежит: Huawei Technologies CO.,Ltd.

Embodiments of this application disclose a noise cancellation apparatus and method. The noise cancellation apparatus includes a main control unit and a noise cancellation processing circuit. The main control unit determines a noise cancellation parameter based on a noise cancellation level index or a feature value for determining a matching degree between a headset and an ear canal of a user. The noise cancellation processing unit obtains an inverse phase noise of an ambient noise based on the noise cancellation parameter. After the inverse phase noise is mixed with a played downlink audio signal, the ambient noise can be canceled. In addition, because the noise cancellation parameter is determined from a preset noise cancellation parameter library based on the received or autonomously determined noise cancellation level index, instead of being uniformly configured, a noise cancellation level can be flexibly adjusted, thereby improving a noise cancellation effect and user experience. 1. A noise cancellation apparatus , comprising:a main control unit (MCU); anda noise cancellation processing circuit coupled to the MCU,wherein the MCU is configured to determine a target noise cancellation parameter from a noise cancellation parameter library based on a received or determined target noise cancellation level index, and the noise cancellation parameter library comprises a correspondence between a noise cancellation level index and a noise cancellation parameter;wherein the noise cancellation processing circuit is configured to obtain a target inverse phase noise based on the target noise cancellation parameter, and the target inverse phase noise is used to reduce or cancel an ambient noise obtained by a reference microphone. andwherein the noise cancellation processing circuit is further configured to perform audio mixing processing on a played downlink audio signal and the inverse phase noise to obtain a mixed audio signal, and the mixed audio signal is played by using ...

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Номер записи: 84
12-01-2017 дата публикации

SOUNDPROOF PANEL

Номер: US20170011728A1
Автор: BRIAN Jean-Luc, FASCIO Valia, SIMON FRANK, VIE Philippe
Принадлежит:

A soundproof panel has a sandwich structure, which includes two outer walls, a core, and modifying elements that are maintained in a fractal distribution by the core. The panel has an improved trade-off between sound attenuation efficiency and the weight of the panel. 24. Panel according to claim 1 , wherein the base pattern is implemented by autosimilarity at least three times in order to form the fractal distribution of the modifying elements ().3. Panel according to claim 1 , wherein the base pattern is a Vicsek pattern or a Sierpinski pattern.44. Panel according to claim 1 , wherein the modifying elements () comprise spheres claim 1 , preferably hollow spheres claim 1 , spring elements or portions of viscoelastic material.53430. Panel according to claim 1 , wherein the core () has a cellular structure claim 1 , and the modifying elements () are contained within a selection of cells () of said structure claim 1 , said selection of cells forming the fractal distribution of the modifying elements.63. Panel according to claim 5 , wherein the core () has a honeycomb structure.7. Panel according to claim 1 , wherein said panel is curved in at least one direction parallel to said panel.8. Panel according to claim 1 , wherein the panel is configured to form at least part of an interior lining of a cockpit or cabin.9. Panel according to claim 8 , wherein the panel is configured to be arranged inside a cabin of an aeroplane or a cockpit of a rotorcraft.10. Panel according to claim 2 , wherein the base pattern is a Vicsek pattern or a Sierpinski pattern.113430. Panel according to claim 2 , wherein the core () has a cellular structure claim 2 , and the modifying elements () are contained within a selection of cells () of said structure claim 2 , said selection of cells forming the fractal distribution of the modifying elements.123. Panel according to claim 11 , wherein the core () has a honeycomb structure. The present invention relates to a soundproof panel that is ...

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Номер записи: 85
14-01-2016 дата публикации

SYSTEM AND METHOD FOR ACOUSTIC MANAGEMENT

Номер: US20160012813A1
Автор: Every Mark Robert, Hetherington Phillip Alan
Принадлежит:

A system and method for acoustic management that includes improving the sound quality of two or more audio processing modules in an acoustic environment may receive first control parameters from a first audio processing module. Receiving second control parameters from a second audio processing module. An audio processing interaction may be derived between with the first audio processing module and the second audio processing module determined from the first control parameters and the second control parameters. The first control parameters and the second control parameters may be modified responsive to the derived audio processing interaction. The modified first control parameters may be sent to the first audio processing module and the modified second control parameters may be sent to the second audio processing module where the first audio processing module and the second audio processing module may perform any one or more of processing audio captured from an acoustic environment and processing audio to be reproduced in the acoustic environment. 1. A method for acoustic management comprising:receiving first control parameters from a first audio processing module;receiving second control parameters from a second audio processing module;deriving an audio processing interaction between with the first audio processing module and the second audio processing module determined from the first control parameters and the second control parameters;modifying the first control parameters and the second control parameters responsive to the derived audio processing interaction; andsending the modified first control parameters to the first audio processing module and the modified second control parameters to the second audio processing module where the first audio processing module and the second audio processing module performs one or more of processing audio captured from an acoustic environment and processing audio to be reproduced in the acoustic environment.2. The method for ...

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Номер записи: 86
14-01-2016 дата публикации

Motor Vehicle Noise Management

Номер: US20160012814A1
Автор: Weber Martin Amandus
Принадлежит:

A device and method that is configured to control the operation of a motor vehicle cabin active sound management (ASM) system that uses an ASM controller to control operation of one or more sound transducers that transmit audio signals in the cabin so as to alter vehicle powertrain-related sounds in the cabin, wherein the motor vehicle further comprises a mobile telephone system that is configured to receive incoming mobile telephone calls and transmit outgoing mobile telephone calls. The device can include a controller that is configured to receive from the mobile telephone system an indication that a mobile telephone call is incoming or an outgoing call is being initiated. After receiving the indication, the subject controller commands the ASM controller to cause operation of one or more sound transducers such that the level of vehicle powertrain-related sounds in the cabin is reduced. 1. A method comprising:receiving a first signal indicative of an initiation of an outgoing telephone call; andin response to the first signal, generating a second signal that, when processed by a controller of an active sound management (ASM) system for a motor vehicle, causes the ASM system to reduce powertrain-related sounds at one or more seating positions within a cabin of the motor vehicle that includes a plurality of seating positions.2. The method of claim 1 , wherein the ASM system comprises an engine harmonic cancellation system that is set to a first powertrain noise target when the motor vehicle is in operation claim 1 , and wherein the second signal causes the ASM system to reduce the powertrain-related sounds at the one or more seating positions from the first powertrain noise target to a second claim 1 , different powertrain noise target.3. The method of claim 1 , wherein the ASM system comprises an engine harmonic enhancement (EHE) system claim 1 , and wherein the second signal causes the ASM system to reduce or eliminate an amount of sound added by the EHE system at ...

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Номер записи: 87
11-01-2018 дата публикации

Voice Sensing using Multiple Microphones

Номер: US20180012584A1
Автор: Eichfeld Jahn Dmitri, Gauger, Isabelle Steven H., JR. Daniel M., Rule John Allen
Принадлежит: Bose Corporation

A noise cancelling headset includes first and second earpieces, each earpiece including a respective feedback microphone, a respective feed-forward microphone, and a respective output driver. A first feedback filter receives an input from at least the first feedback microphone and produces a first filtered feedback signal. A first feed-forward filter receives an input from at least the first feed-forward microphone and produces a first filtered feed-forward signal. A first summer combines the first filtered feedback signal and the first filtered feed-forward signal and produces a first output signal. An output interface provides the first output signal as an output from the headset. 111-. (canceled)12. An in-ear noise cancelling headset comprising:{'b': 104', '112, 'an earpiece comprising a feedback microphone () and an output driver ();'} [{'b': 402', '404, 'the feedback loop including a feedback compensation filter (, ) that receives the first signal and produces the antinoise signal,'}, 'wherein, at frequencies at which voice sounds produced by the wearer of the headset tend to be amplified within an occluded ear canal, the feedback compensation filter produces antinoise at levels selected to counteract such amplification without otherwise cancelling the voice sounds;, 'a feedback loop receiving a first signal from the feedback microphone and providing an antinoise signal, based on the first signal, to the output driver,'} 'the voice output circuit including a voice output filter that receives the first signal and produces a voice-filtered signal; and', 'a voice output circuit receiving the first signal from the feedback microphone,'}a communications interface providing the voice-filtered signal as a voice communication signal output from the headset.13. The headset of claim 12 , further comprising:{'b': '110', 'a feed-forward microphone () coupled to space outside the earpiece;'}{'b': 408', '410, 'a feed-forward loop receiving a second signal from the feed- ...

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Номер записи: 88
10-01-2019 дата публикации

ADAPTIVE SOUND MASKING USING COGNITIVE LEARNING

Номер: US20190013003A1
Автор: Baughman Aaron K., Pandey Diwesh, Perrino John P., Whitman Todd R.
Принадлежит:

In an approach to adaptive sound masking, one or more computer processors analyze a surrounding of one or more users and stores in a database. The one or more computer processors receive a request from the one or more users for adaptive sound masking. The one or more computer processors analyzes a surrounding environment associated with the one or more users and storing a first information associated with the surrounding environment in a database. The one or more computer processors generate a cognitive sound mask base on the first information. The one or more computer processors produce a sound cone based on the cognitive sound mask and directing the sound cone at a distracting sound. The one or more computer processors adapt the sound cone based on changes to the surrounding environment. 1. A method for adaptive sound masking of movements generated by a user , the method comprising:receiving, by one or more computer processors, a request associated with a user for adaptive sound masking of sound associated with a first movement of the user;analyzing, by the one or more computer processors, an activity of the user and storing a first information associated with the activity of the user;generating, by the one or more computer processors, a first cognitive sound mask based on the first information;producing, by the one or more computer processors, a sound cone based on the first cognitive sound mask and directing the sound cone at the first movement of the user; andadapting, by the one or more computer processors, the sound cone based on changes in sound associated with subsequent movements of the user; andforecasting, by the one or more computer processors, the sound cone based on predicting the future movements of the user and producing the sound cone based on the predicted future movement of the user.2. The method of claim 1 , wherein adapting the sound cone further comprises:analyzing, by the one or more computer processors, the activity of the one or more users ...

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Номер записи: 89
14-01-2021 дата публикации

SOUNDPROOF STRUCTURE BODY

Номер: US20210012762A1
Автор: HAKUTA Shinya, OHTSU Akihiko, SUGAWARA Yoshihiro, YAMAZOE Shogo
Принадлежит: FUJIFILM Corporation

Provided is a soundproof structure body including an opening member that forms an opening tube line having a cross-sectional area S, and at least two resonance structures for sound waves that are installed inside the opening tube line, and in a case where a cross-sectional area of the resonance structure is defined as Si, a width thereof is defined as di, an interval between the two resonance structures is defined as L, an impedance of the two resonance structures is defined as Zi, and a synthetic acoustic impedance is defined as Zc, a condition of Expression (1) is satisfied at a resonance frequency f0 at which a theoretical absorption value At is a maximum value. This soundproof structure body can realize high absorption using a plurality of resonance structures. 2. The soundproof structure body according to claim 1 , wherein a resonance frequency of the resonance structure located on the upstream side in the waveguide forward direction is set to be different from a resonance frequency of the resonance structure located on a downstream side claim 1 , out of the two resonance structures.3. The soundproof structure body according to claim 1 , wherein a resonance frequency of the resonance structure located on the upstream side in the waveguide forward direction is higher than a resonance frequency of the resonance structure located on a downstream side claim 1 , out of the two resonance structures.4. The soundproof structure body according to claim 1 , wherein in a case where a wavelength of the resonance frequency f0 is denoted by λ(f0) claim 1 , the interval L satisfies L<λ(f0)/4.5. The soundproof structure body according to claim 1 , wherein the two resonance structures are integrated.6. The soundproof structure body according to claim 1 , wherein the at least two resonance structures are three or more resonance structures.7. The soundproof structure body according to claim 1 , wherein at least one resonance structure of the at least two resonance structures is a ...

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Номер записи: 90
18-01-2018 дата публикации

ACOUSTIC PANELING

Номер: US20180016981A1
Автор: Duschl Garry, Elleby Marta Baginska, Herrera Eric
Принадлежит:

Systems and methods are provided for acoustic paneling. One embodiment is a method for fabricating an acoustic panel. The method includes receiving a sheet of thermoplastic paper, stamping/conforming the sheet into rows that each comprise a three dimensional shape, and transforming the sheet into a multi-celled core. Transforming the sheet includes identifying fold lines separating the rows, folding the sheet at the fold lines in a pleat fold, thereby uniting upper surfaces of adjacent rows and uniting lower surfaces of adjacent rows; and compressing the rows of the folded sheet together in the presence of heat, causing adjacent rows to fuse together into cells. The method further includes applying a backing sheet to the core, and applying a facesheet to a surface of the core that includes openings which direct a portion of airflow across the facesheet into the cells, resulting in acoustic control. 1. A method comprising: receiving airflow across openings of a facesheet of the panel that is fused to a multi-celled core of the panel;', 'directing the airflow into cells of the acoustic panel via the openings in the facesheet;', 'absorbing energy from the airflow as the airflow travels within the cells such that audible frequencies of sound generated by the airflow are attenuated by the cells;', 'reflecting the airflow off of a backing sheet for the cells; and', 'expelling the airflow from the cells via the facesheet., 'performing acoustic control of jet engine noise via an acoustic panel, comprising2. The method of further comprising:directing the airflow through a septum of the cell prior to the airflow reflecting off of the backing sheet of the cell.3. The method of wherein:directing the airflow comprises receiving the airflow via a slot of the facesheet that is elongated in an expected direction of airflow across the facesheet.4. The method of further comprising:directing, absorbing, reflecting, and expelling the airflow multiple times as the airflow continues ...

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Номер записи: 91
16-01-2020 дата публикации

STRUCTURED PANEL WITH INTEGRATED SKIN AND SIDEWALLS

Номер: US20200017189A1
Автор: Kruckenberg Teresa
Принадлежит:

A panel includes a core between and connected to a first skin and a second skin. The core includes a corrugated body, a first sidewall and a second sidewall. The corrugated body includes a plurality of corrugations configured from at least a plurality of baffles and a plurality of septums. Each of the corrugations includes a respective one of the baffles and a respective one of the septums. A first cavity extends laterally within the core from a first of the baffles to a first of the septums. The first cavity extends longitudinally within the core from the first sidewall to the second sidewall. The first cavity is fluidly coupled with a passage through a first portion of the first skin. The first portion of the first skin, the first sidewall and the second sidewall are collectively at least partially formed by a ply of material. 1. A panel for attenuating sound , comprising:a first skin, a second skin and a core between and connected to the first skin and the second skin, the core including a corrugated body, a first sidewall and a second sidewall;the corrugated body including a plurality of corrugations configured from at least a plurality of baffles and a plurality of septums, each of the corrugations including a respective one of the baffles and a respective one of the septums;wherein a first cavity extends laterally within the core from a first of the baffles to a first of the septums, the first cavity extends longitudinally within the core from the first sidewall to the second sidewall, and the first cavity is fluidly coupled with a passage through a first portion of the first skin; andwherein the first portion of the first skin, the first sidewall and the second sidewall are collectively at least partially formed by a ply of material.2. The panel of claim 1 , wherein the ply of material comprises thermoplastic material.3. The panel of claim 1 , wherein the ply of material comprises thermoset material.4. The panel of claim 1 , wherein the ply of material ...

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Номер записи: 92
21-01-2016 дата публикации

METAMATERIAL

Номер: US20160019879A1
Автор: Daley Stephen, Reynolds Matthew John
Принадлежит:

A metamaterial () for attenuating acoustic transmission comprises a plurality of layers (). Each layer () comprises a transmission structure () and a resonator (), coupled to the transmission structure (). The transmission structure () in a layer () is coupled to the transmission structures () of the layers () neighbouring said layer (). The resonator () in a layer () is coupled to the transmission structure () of the layers () neighbouring said layer (). 1. A metamaterial for attenuating acoustic transmission , the metamaterial comprising a plurality of layers , each layer comprising:(a) a transmission structure, and(b) a resonator, coupled to the transmission structure,wherein the transmission structure in a layer is coupled to the transmission structures of the layer(s) neighbouring said layer; CHARACTERISED IN THAT the resonator in a layer is coupled to the transmission structure of the layer(s) neighbouring said layer.2. A metamaterial as claimed in claim 1 , in which there are at least three of said layers.3. A metamaterial as claimed in claim 1 , in which the transmission structure comprises a disc or an annulus.4. A metamaterial as claimed in claim 3 , in which the discs or annuli of the layers are coaxial with each other.5. A metamaterial as claimed in claim 1 , in which the resonator is a cylinder.6. A metamaterial as claimed in claim 5 , in which the cylinders of the layers are coaxial with each other.7. A metamaterial as claimed in claim 6 , in which the transmission structure comprises a disc or an annulus and the cylinders are co-axial with the discs or annuli.8. A metamaterial as claimed in claim 1 , in which any of the couplings are viscoelastic couplings.9. A metamaterial as claimed in claim 1 , in which the metamaterial includes at least one active element configured to enhance the attenuation of acoustic transmission.10. A metamaterial as claimed in claim 9 , in which the at least one active element is comprised in at least one of the resonators. ...

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Номер записи: 93
03-02-2022 дата публикации

INTERLOCKING BLOCKS FOR BUILDING CUSTOMIZABLE RESONANT SOUND ABSORBING STRUCTURES

Номер: US20220036871A1
Автор: IIZUKA Hideo, Lee Taehwa, Tsuruta Ryohei
Принадлежит:

Systems for building modular quarter-wavelength resonators, and arrays of said resonators, include interlocking blocks having channels in them. Different block varieties can include those having straight channels and those having curved channels, to facilitate assembly of resonators of any desired configuration. Resonator length, and therefore resonance frequency, can be easily designed by adjusting the number of blocks used for a particular resonator. 1. A modular acoustic sound absorber , the sound absorber comprising: [ a top surface comprising one or more first type connector elements; and', 'a bottom surface, parallel to and opposite the top surface, and comprising one or more second type connector elements configured to engage with the one or more first type connector elements of an adjacent block;', 'one or more side surfaces connecting the top and bottom surfaces; and', 'a straight channel forming apertures in the top and bottom surfaces and passing through an interior of the straight channel block and thereby forming at least a portion of each tube resonator; and, 'one or more straight channel blocks having an exterior shape, each straight channel block having, 'one or more terminator blocks forming an end wall of each tube resonator., 'a plurality of tube resonators, each tube resonator of the plurality of tube resonators comprising2. The sound absorber as recited in claim 1 , wherein at least one tube resonator of the plurality of tube resonators comprises: a top surface comprising one or more first type connector elements;', 'a bottom surface parallel to and opposite the top surface;', 'a coupling side surface, connecting the top and bottom surfaces, and having one or more second type connector elements; and', 'a nonlinear channel forming apertures in the top surface and the coupling surface, and passing through an interior of the nonlinear channel block and thereby forming at least a portion of the at least one tube resonator., 'one or more nonlinear ...

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Номер записи: 94
17-01-2019 дата публикации

Soundproofing structure, opening structure, cylindrical structure, window member, and partition member

Номер: US20190019489A1
Автор: Hiroshi Komatsu, Shinya Hakuta, Shogo Yamazoe
Принадлежит: Fujifilm Corp

An object is to provide a soundproofing structure which exhibits high soundproofing performance in a broad frequency band, can be miniaturized, can ensure ventilation properties, and has a light transmittance, and a cylindrical structure, a window member, and a partition member including this soundproofing structure. Provided is a soundproofing structure including: a soundproofing cell which includes a frame having a frame hole portion passing therethrough and a film that covers the frame hole portion and is fixed to the frame, in which the film has a plurality of through-holes passing therethrough in a thickness direction, an average opening diameter of the through-holes is in a range of 0.1 μm to 250 μm, and a vertical direction of a film surface is disposed so as to be inclined with respect to a direction of a sound source to be soundproofed.

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Номер записи: 95
17-01-2019 дата публикации

SOUNDPROOFING STRUCTURE, PARTITION STRUCTURE, WINDOW MEMBER, AND CAGE

Номер: US20190019490A1
Автор: HAKUTA Shinya, KOMATSU Hiroshi, YAMAZOE Shogo
Принадлежит: FUJIFILM Corporation

Provided is a soundproofing structure including: a plate-like member which has a plurality of through-holes passing therethrough in a thickness direction, in which in a case where an average opening diameter of the through-holes is 0.1 μm or greater and less than 100 μm, and in a case where the average opening diameter of the through-holes is set as phi (μm) and a thickness of the plate-like member is set as t (μm), an average opening ratio rho of the through-holes is greater than 0 and less than 1 and falls in a range where a center is rho_center=(2+0.25×t)×phi, a lower limit is rho_center−(0.052×(phi/30)), and an upper limit is rho_center+(0.795×(phi/30)). 1. A soundproofing structure comprising:a plate-like member which has a plurality of through-holes passing therethrough in a thickness direction,wherein an average opening diameter of the through-holes is 0.1 μm or greater and less than 100 μm, and{'sup': −1.6', '−2', '−2, 'in a case where the average opening diameter of the through-holes is set as phi (μm) and a thickness of the plate-like member is set as t (μm), an average opening ratio rho of the through-holes is greater than 0 and less than 1 and falls in a range where a center is rho_center=(2+0.25×t)×phi, a lower limit is rho_center−(0.052×(phi/30)), and an upper limit is rho_center+(0.795×(phi/30)).'}2. The soundproofing structure according to claim 1 ,wherein the average opening ratio of the plurality of through-holes is 2% or greater.3. The soundproofing structure according to claim 1 ,wherein a plurality of the plate-like members are arranged in the thickness direction.4. The soundproofing structure according to claim 2 ,wherein a plurality of the plate-like members are arranged in the thickness direction.5. The soundproofing structure according to claim 1 ,wherein a surface roughness Ra of an inner wall surface of the through-hole is in a range of 0.1 μm to 10.0 μm.6. The soundproofing structure according to claim 2 ,wherein a surface roughness Ra of ...

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Номер записи: 96
17-01-2019 дата публикации

CALIBRATION AND STABILIZATION OF AN ACTIVE NOISE CANCELATION SYSTEM

Номер: US20190019491A1
Автор: Irrgang Thomas, Kumar Amit, Rathoud Shankar, Sorensen Eric
Принадлежит:

A fixture for calibrating an active noise canceling (ANC) earphone, the calibration fixture including an ear model and an acoustic path. The ear model is configured to support an ANC earphone and includes an ear canal extending from an outer end of the ear canal to an inner end of the ear canal. The acoustic path is external to the ear canal and extends from, at a first end of the acoustic path, the inner end of the ear canal of the ear model to an opposite, second end of the acoustic path. The acoustic path is configured to transmit a mechanical sound wave received from the inner end of the ear canal to a region external to the ear model and adjacent the outer end of the ear canal. 1. A fixture for calibrating an active noise canceling (ANC) earphone , the calibration fixture comprising:an ear model configured to support an ANC earphone, the ear model including an ear canal extending from an outer end of the ear canal to an inner end of the ear canal; andan acoustic path external to the ear canal and extending from, at a first end of the acoustic path, the inner end of the ear canal of the ear model to an opposite, second end of the acoustic path, the acoustic path being configured to transmit a mechanical sound wave received from the inner end of the ear canal to a region external to the ear model and adjacent the outer end of the ear canal.2. The calibration fixture of claim 1 , further comprising a damping partition between the inner end of the ear canal and the first end of the acoustic path claim 1 , the damping partition configured to reduce an amplitude of the mechanical sound wave received at the acoustic path from the inner end of the ear canal.3. The calibration fixture of claim 1 , in which the ear canal is configured to anatomically resemble a human ear canal claim 1 , and in which the ear model further includes a concha configured to anatomically resemble a human ear concha and a pinna configured to anatomically resemble a human ear pinna.4. The ...

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Номер записи: 97
17-01-2019 дата публикации

ACTIVE NOISE CONTROL APPARATUS

Номер: US20190019493A1
Автор: Yano Atsuyoshi
Принадлежит: Mitsubishi Electric Corporation

An active noise control apparatus () includes: a sound source signal generating unit () generating a sound source signal from a control frequency determined in accordance with a noise source (); a control signal filter () generating an original control signal by filtering the sound source signal; a stabilization processing unit () generating a control signal by filtering the original control signal to allow a signal in a frequency band including the control frequency to pass through, and to block a signal in a frequency band including disturbance added to the noise; a reference signal filter () generating a reference signal by filtering the sound source signal. The apparatus further includes: a filter coefficient updating unit () updating a filter coefficient sequence of the control signal filter using an error signal being an interference between a secondary noise generated from the control signal and the noise, and the reference signal. 1. An active noise control apparatus comprising:a sound source signal generator generating a sound source signal on a basis of a control frequency which is determined in accordance with a noise source emitting noise;a control signal filter generating an original control signal by performing a filtering process on the sound source signal;a stabilization processor generating a control signal by performing a filtering process on the original control signal to allow a signal in a frequency band including the control frequency to pass through, and to block a signal in a frequency band including disturbance added to the noise;a reference signal filter generating a reference signal by performing a filtering process on the sound source signal; anda filter coefficient updater updating a filter coefficient sequence of the control signal filter by using an error signal which is acquired as a result of interference between a secondary noise which is generated on a basis of the control signal and the noise, and the reference signal.2. The ...

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Номер записи: 98
17-01-2019 дата публикации

Pop noise control

Номер: US20190019527A1
Автор: Markus Christoph
Принадлежит: Harman Becker Automotive Systems GmbH

Example pop noise removal systems and methods include detecting impulsive components in an input signal based on a signal-to-noise ratio spectrum of the input signal, and generating a spectral pop noise removal mask and applying the spectral pop noise removal mask to the input signal if impulsive components in the input signal are detected, the pop noise removal mask configured to suppress the impulsive components in the input signal, when applied.

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Номер записи: 99
17-04-2014 дата публикации

ECHO CANCELLATION METHOD AND DEVICE

Номер: US20140105410A1
Автор: Zhan Wuzhou
Принадлежит: Huawei Technologies Co., Ltd.

The present invention discloses an echo cancellation method. The method includes: dividing an audio signal into a high-band audio signal and a low-band audio signal; performing adaptive filtering on the low-band audio signal, and performing synthesis filtering on a signal obtained after the low-band audio signal undergoes the adaptive filtering and on the high-band audio signal to generate a preliminary echo cancellation signal; performing envelope predication echo suppression on a high-band signal in the preliminary echo cancellation signal, and calculating and outputting a residual echo suppression coefficient; performing echo suppression on a low-band signal in the preliminary echo cancellation signal, and outputting a processing result; and multiplying the output result by the residual echo suppression coefficient, and outputting a signal of which echoes are canceled. 1. An echo cancellation method , comprising:dividing, by performing Quadrature Minor Filter (QMF) analysis filtering, an audio signal to be processed into a high-band audio signal and a low-band audio signal;performing adaptive filtering on the low-band audio signal, and performing QMF synthesis filtering on a signal obtained after the low-band audio signal undergoes the adaptive filtering, and performing the QMF synthesis filtering on the high-band audio signal to generate a preliminary echo cancellation signal;performing envelope predication echo suppression on a high-band signal in the preliminary echo cancellation signal, and calculating and outputting a residual echo suppression coefficient;performing echo suppression on a low-band signal in the preliminary echo cancellation signal, and outputting a processing result; andmultiplying an output result by the residual echo suppression coefficient, and outputting a signal, wherein echoes of the signal are canceled.2. The echo cancellation method according to claim 1 , wherein the performing the adaptive filtering on the low-band audio signal claim ...

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Номер записи: 100