Spitzenwert-abgeleitete zeitsteuer-stimulationsstrategie für ein mehrkanal-cochlear-implantat

The available invention concerns an improved procedure for the production of electrical Seize for application for the neuralen structures of a Cochlea and mechanisms to the DurchfOhrung of such strategies. To background of the invention of Cochlear implant systems generally information by receiving of a sound signal, for extraction yon, which is used as basis for the attractions k6nnen, and for the production of the necessary attractions for the ZufOhrung for a intracochlearen electrode arrangement, functions to processing of the received signal. The speech processing strategy is the procedure, which is used for the determination, which information, which is filtered from the sound signal, when basis is to be used for the stimulation and some the characteristics of the which is used attraction. There is a number yon speech processing strategies, which were eingefOhrt by means of more-canal Cochlear implants, which used stimulation acts, which are balanced with the substantial frequency of a speaker. Head chlich from EnergiegrOnden such strategies covered only few electrodes, and the stimulation took place with a small F0-Rate (substantial Frequenzoder repetition rate). Such strategies essentially used a filter channel, which is intended for the extraction of the voting situation of the Sprachsignals. The Periodizit t of the voting situation was used for adjustment the Stimulationsperiodizit t for two or three electrodes. Second or a m6glicherweisse third channel became the determination the frequency (Periodizit t) and amplitude (energy) determined within a frequency band. The Periodizit t, which was determined from the second and/or third filters, was used, around auszuw hlen, which electrode was to be stimulated for the second and third channel. The Periodizitat of the stimulation this channel was the same with all Kanalen and became from the Periodizit t of the output channel from the F0-Filter eroo oo EO 00! i.:. “i'.:.” averages. In each case the amplitude of the output signal from the appropriate filter determines the amplitude of the stimulation in a certain channel. Dutch of progress in the technology was replaced gradual h6here stimulation rates into the 90igern m6glich and the F0-Synchronreizung dutch, to high frequency provoking strategies as for example SPEAK and CIS, which normally stimulate with a rate within the range yon 250-3000 cycles per second per electrode. The SPEAK strategy, which in US-A-5 597,380 is descriptive, (and in a number of language processors, which by Cochlear Limited are manufactured, is used) a grO6ere uses number of analysis filters and stimulates at seder analysis period more electrodes than the F0-Synchronstrategie. Protecting each analysis period tests the SPEAK strategy the exit of each of the arrangements of the spectrographic analysis filters and the stimulation groove for those electrodes is applied, which correspond tonotopisch ausgew to the hlten filters with the grOSten amplitude. In this case the provoking frequency of each individual electrode is variable ngig, abh of that amplitude of the signals, according to each electrode. The CIS strategy is descriptive in US-A-4 207,441. With this strategy there are n electrodes, which are connected to the n filter with one in each case. Each electrode is stimulated once per analysis period, with a Intensitat, which corresponds to the amplitude of the appropriate filter channel. With this strategy the analysis period is determined before, and thus the stimulation frequency of each electrode is more or less fixed. Recently in PCT/AU00/00838 by the available applicant a strategy was described, filters which stimulation rates from the input signal and with different rates (the multi-rate pattern) makes a stimulation available of different electrodes. Furthermore the multi-rate pattern specifies the stimulation rate and amplitude for one ausgew hlte to electrode in accordance with the measurements of the signal characteristics in the appropriate filter volume and describes a dispatching pattern for handling yon conflict times of stimulation. “'i "" • • oooo • agog go 0 • o • the multi-rate pattern determines the stimulation rate in each volume by fairs of the intervals between positive zero-gone through the filtered signal regardless of its, w • protecting the total time the Nulldurchg nge occurs. This is to make a Periodizitatsinformation to the user available. In the multi-rate pattern the total rate is by Glattung of the Ratensch tzungen limited, so that the entire timing of the events is not erfaSt. A further Factor, which was not berOcksichtigt by frohere speech processing strategies, are the interauditiven time delays of the binauralen H rens. With the strategies developed so far filter bank procedures were used, which reject the Tr gerphase in each volume and (at best) received the clay/tone extent modulations in the volume. It is however with normal H6ren often the case that at least with low frequencies the Tragerphasenunterschiede between the two ears is an important note. Furthermore k6nnen with fixed scanning rate strategies, as for example SPEAK and CIS, asynchronous scanning of the Tonumfangs at the two ears inconsistent level references between the two ears include. There is a number of studies, which were undertaken in the use area, which is connected with binauralem hearing, for example: Bronkhorst, A.W., and Plomp, R., 1988, The effect OF head induced interaural time and level of differences on speech intelligibilitiy into noise ", journal OF the Acoustical Society OF America, 83, 1508-1516. Bronkhorst, A.W., and Clomp, R., 1988, Binaural speech intelligibility into noise for hearing impaired listeners ", journal OF the Acoustical Society OF America, 86, 1374-1383. Carhart, Ro, 1965, Monaural and binaural discrimination against competing sentences ", internationally Audiology, 4, 5-10. oo oee oo oo [...] -” Dirks, D.D and Wilson, R.H., 1969, The effect OF spatially separated sound SOURCEs on speech intelligibility ", journal OF Speech and Hearing Research ", 12, 5-38. Hausler, R., Colburn, S., and Marr, E., 1983, sound Localization in Subjects with Impaired Hearing ", Acta Otolaryngologica, Supplement 400. Hawley, M.L., Litovsky, R.Y., Colburn, H.S., 12999, Speech Intelligibility and localization in A multi-SOURCE environment ", journal OF the Acoustical Society OF America, 105, 3564-3448. Licklider, J.C.R., 1948, The influence OF interaural phase upon the masking OF speech by white noise ", journal OF the Acoustical Society OF America, 20, 150-159. MacKeith, N.W., and Coles, R.R., 1971, Binaural of advantages in hearing OF speech ", journal OF Laryngology and Otology, 85, 213232. Peissig, J. and Kollmeier., B., 1997, Directivity OF binaural noise reduction into spatial multiple noise SOURCE arrangements for normally hearing and impaired listeners ", journal OF the Acoustical Society OF America, 105, 1660-1670. Rayleigh, L., 1907, on our perception OF sound direction ", Philosophical of magazines, 13, 214-232. Sayers, B.M., 1964, Acoustic image lateralization judgements with binaural clay/tone ", journal OF the Acoustical Society OF America, 36, 923-926. searle, C.L., Braida, L.D., Davis, M.F., and Colburn, H.S., 1976, Model for auditory localization ", journal OF the Acoustical Society OF America, 60, 1164-1175. Wightman, F., and Kistler, D.J., 1992, The dominant role OF low frequencies interaural time of differences in sound localization ", journal OF the Acoustical Society OF America, 91, 1648-1661. “: "" o. oo • • • oo • oo it is generally recognized that the H6ren with both ears contrary to the H6ren with an ear with normal Zuh6rern an improved Sprachverstandlichkeit yon sound and the FMhigkeit for the better determination of the sound direction erm6glicht. Studies with normally h6renden and h6rgesch digten Zuh6rern showed that the Onterschied of the binauralen Verstandlichkeitslevels (PICTURE) a function both the interauralen level differences (ILD) and the interauralen time delays (ITD) is. It was shown at the same time that the localization is in the horizontal level a function, which primer is abhangig yon ILDund ITD references at the two ears. A task of the available invention a speech processing strategy is to be made available, which makes improved temp-oral information available for a BenOtzer of an Cochlear implant. Summary of the invention the available invention makes a speech processing strategy available, with which the time of provoking is essentially co-ordinated fur a certain electrode with tempor the RH point in the expenditure for filter according to this electrode in the broadest sense. Thus the timing information is arranged for the user for the appropriate Schallsignal - and not only the amplitude or Periodizitat of the signal -. The available invention essentially concentrates on the use of the occurrence yon points in the band-pass filter-filtered signal of the detected sound for dictating the stimulation applied on the Cochlea. Dutch concentration on the occurrence yon points in the band-pass filter-filtered signal can be adjusted the time of provoking for stimulation at the time-positive points, which arise in each volume, and makes an improved temporal accuracy available of stimulation, as it is guaranteed that the amplitude of the determined points is present at the suitable time. This erm6glicht it that the temporal information in the signal oo • IO IO::.:. : [...] o. ° it is better retained whereby an improved real time stimulation is made available to the Ben0tzer. As consequence of the durchgefOhrten approach the available invention information 0ber knows a majority at signals in each filter volume better 0bertragen. This stands contrary to most Schallverarbeitungsschemen, which information represents yon to each volume with individual stimulation rate, comprehensively the multi-rate strategy, which averages the zero crossover information yon all signals in the volume. The m6gliche advantage is that the ZuhSrer 0bertSne from several acoustic sources can separate better, even if the components in each filter volume is mixed. This can help for example with the separation from contemporaneous speakers. In a practical Ausf0hrungsform with not contemporaneous stimulation it is important that all Bander is not at the same time stimulated to kSnnen and within the total rate delimitations of existing Cochlear Implantateinrichtungen by delimitation of the stimulation rate in each electrode remain. In a preferential AusfOhrungsform of the available invention this is reached within each volume by specification of a minimum tolerated deviation of the points. If the points lie in a volume more nether together than the minimum interval permitted, only the h6chste point is maintained. This procedure of the delimitation guarantees that the stimulation of the maintained points remains synchronous with the entrance audio signal, contrary to the approach of the Sattigung of the stimulation rate with a fixed Weft, as this is with many other strategies the case. In order a simultaneous stimulation on several Kan it len with non-simultaneous mechanisms to prevent, likewise a dispatching pattern f0r the case is benStigt that at the same time in two or several B ndern points arise. The dispatching pattern gema5 of a AusfOhrungsform of the available invention 18st such conflicts in a way, which minimizes the temporal distortion in the Frequenzb ndern, in which the ZuhSrer of sensitive f0r fine temporal information is, and beson • .oo…. i i " [...].:.” i oe • ders interaurale Zeitverz6gerungen (ITDs) during the fine timing. More exactly said, the preferential Ausf0hrungsform of the available invention uses a pattern, with which in the low frequency region, for example with up to approximately 1500 cycles per second, stimulations yon low frequency is given to Prioritat to high frequency, until the point is in the high frequency volume a specified Verhaltnis gr65er as those of the low frequency volume, for example twice as highly. With frequencies more ber about 1500 cycles per second low frequency points are priorisiert simply gegen0ber high. If conflicts erreignen themselves, the points with lower Priority m6glichen stimulation interval chsten to the n are shifted temporally either vorw RTS or rockwarts. Only if all close times are occupied determined points with h6herer Prioritat also before and the ben6tigte Zeitverschiebung a specified limit value upperwalks, 16scht the pattern the point and uses it not f r stimulation. Through sorgf itiges adjusting of the number of Bandern and adjusting of suitable limit values k6nnen points in Niederfrequenzb ndern very exactly to be maintained and even with h6heren B ndern (where Zuh6rer are not so sensitively f r temporal respect signals) should be rare it the case that all points gel are scht. It should be pointed out that when using mechanisms, which are suitable for simultaneous stimulation the dispatching pattern can be omitted with the invention without problems. Furthermore the available invention can be more tzer f r Ben with groove only one Cochlear implant yon advantage and has a specific application to patients with binauralem Cochlear implant, who have an Cochlear implant in each ear. In the binauralem case the invention helps to maintain arrival differences between both ears exactly and in such traps m the strategy of the available invention sste with each ear to be used. From the limited number of Ver6ffentlichungen bez0glich of the Ben0tzer yon it is evident to bilateral implants that both the improved F higkeit for the determination of the sound direction "" “: "" i """ • • oooo • • • ooeo • EO • • • EO • go in horizontal level and understanding the language with raumlich separated Tenet with humans with implants in addition fOhrt that they use two mechanisms instead of one (van Hoesel and Clark, 1999, Speech results with A bilateral multichannel cochlear implant for spatially separated signal to the noise”, Aust. J. Audiol, 21, 23-28; van Hoesel, Ramsden and O'Driscoll, 2002, sound direction identification, interaural time delay discrimination and speech intelligibility advantages into noise for A bilateral cochlear implant user Ear Hear., April 2002; van Hoesel and Tyler, Speech perception, localization and lateralization with bilateral cochlear implant users - bermittelt at J.Acoust. Soc.Am., 2002). A grocer portion of these advantages is deduced however at present from interauralen degree differences, and it is at this time not obvious, how much zusatzliche advantages from the interauralen timing information are deduced k6nnen. Normally h rende Zuh6rer profit clearly both from ILDs and ITDs. The potential contribution of ITDs for BenOtzer of Cochlear implants hangt both of that Fahigkeit of the sound coding strategy off, in order to maintain the information in the transformation from more akkustischer to electrical stimulation, and of that Fahigkeit of the Zuh6rers for the use of the information in the electrical impulses. The available invention aims in the special one at the first off. Although frohere studies showed by van Hoesel and Clark (1997) that some Ben has a very bad ITD Sensibilitat (something 0.5 ms or less) more tzer from bilateral implants, showed a newer study of van Hoesel and Tyler (2002 upperaverage) that others exhibit an on the average good ITD Sensibilit t of 100-150 s or sometimes even better. Although this is not as good as normal H6ren, Verz are struggled this GrO enordnung from signals in meet resembled scenarios available, if these are appropriate for I0 degree of that with waiter for instance center. Furthermore the same study shows that with not modulated pulse rates, this Sensibilitat becomes many worse with stimulation rates a waiter a few hundred cycles per second. With stimulation rates of 800 pps the studies showed that the ITD Sensibilit t is improved however substantially by use of a modulation of 50 cycles per second k6nnte. In this case both that, became more ger and the Tonumfang simultaneous Tra "" “'i "" • • • • • • ee • • • • • • • • in an ear verz6gert. Glad signs are rather that, if the Trager (i.e. stimulation fine timing) is kept fixed and only the Tonumfang in an ear is gert verz, the ITD Sensibilitat with the Verz6gerung entire stimulation is comparable. This Obertragenen pulse rates did not modulate commodity from the bad ITD Sensibilit t against more ber with high rate to expect. The consequence is that even with existing fixed rate strategies the listeners show an on the average good ITDSensibilitat gegendber sound signal clasping. However the clay/tone extent information is important to w with high frequencies, becomes hrend with lower frequencies the fine timing of the signals more important in the normal H6rfall. Act chlich the normal H6rsystem is essentially more sensitively against-upper the ITDs in the fine timing, particularly between 800 and I000 cycles per second, when it is against upper the Tonumfangs ITDs of high frequency signals. The available invention tries to draw this aspect by better coding of the fine timing of ITDs zus tzlich to the Tonumfangs ITDs. It is to be also noted that with many subjects monaurale spacer feelings the electrical Impulsraten waiter few hundred Hertz an s ttigen and that this is a reference to it that the system of the listener is unfahig to the 0bermittlung of speed-rare information waiter those rates outside. This can be the reason dafur that in bilateral ITD studies subjects showed a bad ITD Sensibilit t against-upper signals with temp-oral variations, which are faster than a few hundred Hertz. This result means that the available invention is more effective than existing beginning only fur signals, which erfOllen the low time rate criterion. Now follows a number of details, which compare the available invention with frOheren attempts. The multi-rate pattern determines the rate of stimulation in each volume by fairs yon intervals between positive Nulldurchg ngen the filtered signal regardless of its, where in the absolute time the Nulldurchg nge occurs. There the previous multi-rate pattern also a smooth one the Ratenschatzungen pre - I0 - [...].: •.: o struck, is lost further absolute times of the events. The available invention schatzt the rates not, but stimulated on positive points in the signal at the time, where they arise do essentially (under Ber cksichtigung a fixed processing delay). Furthermore the preferential Ausf hrungsform the available invention uses the Spitzenwertgr65en, which is present at the given time, in order to guarantee that the entire stimulation clay/tone extent is exact fur each volume. It is to be seen that other EnergiemaSnahmen is used related to the point time k6nnten, for example a cut out-limited rms around the point. The points of the Tonumfangs or the Tragers could be used. Such Ausf hrungsformen is covered in the term Spitzengr65e, how in the description and the Anspr chen used. The important task is that the measurement is related to the point time. In the application of multi-rates the wOrde arrangement of the SpitzengrO of EN impulses with Nulldurchg ngen the temporal information distort, since the signal has do essentially no energy at the zero crossover time and since the relative timing of the points and Nulldurchg does not remain constant nge fur arbitrate signals. The available invention improves from there the temporal information by representation from Spitzenwertgr6BenImpulsen to that time, at which they arise do essentially. The preferential Ausf0hrungsform of the available invention differs also yon the previous multi-rate strategy, the number of electrical impulses fur the same signal segment, which by everyone the Schemen is hrt zugef. Since the multi-rate pattern uses an electrical impulse per measured rate interval (positively going zero crossover, derived) and the new pattern positive points uses, with most arbitr nge and positive points are not alike to ren signals the number of Nulldurchg, so that a different number of electrical impulses per signal segment becomes zugef0hrt. The preferential Ausf0hrungsform of the available invention makes available also, compared to the multi-rate strategy, a new and inventive rate delimitation procedure. With the multi • • • • O0 • Q • 0000 • • 00 • • • • 0 • Q 0 • - [...] - guessing strategy is the total rate by rounds of the Ratensch tzungen limited, which hrt before like erw hnt to a loss the absolute timing the procedure f, and which dekorreliert with high rates do essentially all zero crossover rates with the attraction rates. The preferential AusfOhrungsform of the available invention uses a specified delimitation on the permitted Beabstandung between the points in a volume, over temporal intervals from up to 700 microseconds to erm6glichen, over frequencies there extends, w • a temporal demarcation is highest, and corresponds annahernd the Geh6rnerv-Absolut-Refraktarzeiten. The preferential AusfOhrungsform of the available invention differs also yon the frOheren multi-rate pattern by the fact that a new and inventive procedure for the handling is used yon conflicts between simultaneous attraction points in repeated B ndern. The multi-rate pattern used an order system with the Stimulationen in accordance with an amplitude and shifted Bander with low amplitude on up to 5 stimulations more spater. The preferential Ausf hrungsform the available invention arranges stimulations gema the frequency, whereby into the Bandern with low frequency zus tzliche Amplitudenabw - gungen to be made. This new procedure was developed because of observations in the literature that the temporal Sensibilitat and particularly the binaurale Sensibilitat under 1500 cycles per second at the best one are. See for example become lumpy & Eady, 1956, Some measurements OF interaural time difference thresholds JASA 28, pages 859-860. In the preferential AusfOhrungsform the available invention lower Priorit tsimpulse over up to 2 attraction intervals is shifted temporally forward or in the back. Short description of the designs a preferential Ausfdhrung of the available invention is described now with reference to the enclosed figures, in those: Fig. 1 a typical Cochlear Implantateinrichtung shows; Fig. 2 a block model for the signal flow in the speech processing strategy in accordance with 5 of a AusfOhrung of the available he “'“i.:. "" "" EO • o o EO EO identification illustrates; Fig. 3 the code connected with the computation of the peak values of the signal in accordance with 5 of a AusfOhrung of the invention shows; Fig. 4 the main code gema a AusfOhrung of the invention, containing the suggested assigning method, shows; and Fig. 5 a flow chart is, which illustrates schematically in the code of the figures 4 and 5 verk6rperte procedures. Detailed description in figure 1 is shown a typical Cochlear implant, which consists of a uSeren component with a language processor 1 and an internal component with a implantierten Empfanger and a stimulation unit 6 as well as an intracochlear array i0. The external component exhibits further a microphone 2, which is shown in one with the language processor 1. In this representation the language processor is in such a way arranged that it fits behind the ear, whereby the microphone thereby is integrated. Alternative versions k6nnen likewise to be considered, whereby the language processor at the K6rper is carried and connected separately with the microphone, and also that the language processor and the microphone the patient are implantiert. The available invention is applicable to all these alternatives, and it should be recognizable that a Binauralversion of this strategy is also m6glich and generally two unabh ngige units with a microphone behind each ear contain wOrde. In such a mechanism or in such mechanisms environment clay/tone by a microphone 2 are detected, and a converted signal is produced by which is for the environment sound representatives. The processor unit 1 processes this converted signal in accordance with 5 of a number yon strategies (the strategy of the available invention will be utert below more in the detail erl), and on basis of this processing Reizstr6me between the electrodes of the Intracochlear array 10 is put on. For example k nnen in one, monopoly arene " kind by stimulation Reizstr ME to the Fliest between an electrode of the electrode array i0 and a ExtracochlearElektrode 115 to be arranged. In the Basilarmembran 8 taken up nerve unloadings to the central nervous system of the Tragers dutch go rnerv to 9 led. oo • • • • • oo in the case that an attraction stream between a Apicalelektrode, e.g. the electrode iii, and an Extracochlear electrode 115 flieSt it is taken, a H6rempfindung with lower Tonh6he by the Tr - more ger the prosthesis A than in the case that an attraction stream between the basal electrode 107 and the Extracochlear electrode 115 flieSt, because of the tonotopischen arrangement of the snail. The available invention is described now with reference to a specific AusfOhrung. It will have to be seen however that the available invention can be ausgefOhrt in different kinds, with suitable modifications, in order to fit the questionable Cochlear Implantationssystem. In figure 2 a block model of the entire signal flow from the microphone is shown to the implant fur the available invention. The basic function of a language processor is to take up and convert to correspondence to a special language coding strategy an audio signal of a microphone 20, in order to produce a signal, typically a HF-signal, a stimulation information fur the implant enth it. How managing erw Umgebungst6ne of the microphone are hnt detected, and thus a converted signal is produced, which is reprasentativ fur the environment sound. The audio preprocessor 21 essentially verstarkt the very weak signal, which will receive from the microphone, on a level, which can be easily processed by the brigen signal processing system. If the T6ne is mpft much ged, one can be necessary betr chtliche Verstarkung (profit), and if the T6ne is loud, lower amplifier becomes rkung a ben6tigt. The Ausma5 of the Verstarkung, which is applied to the sound, is steered by the Ben0tzer waiter its sensitivity control in connection with automatic amplifier rkungssteuerung or an automatic sensitivity control, which is intended in the system. Since the function of an audio preprocessor in the technology admits and is not for the amplifiers ndnis the available invention of importance, this characteristic is not continued to describe. The n chste stage in expiration of signal processing is the filter bank 22. The filter bank essentially consists of a sentence yon bandpass filters, which cover the incoming frequency range of the system. The Frequenzgrenzen are based on critical B ndern, which roughly linear below I000 cycles per second beabstandet and ee ee ee ee… o° oo°o °oe° o° Oooo° are logarithmically beabstandet up yon i000 cycles per second. Each filter is assigned to a channel, so that the number of filters is equal to the number of Kane. A bandpass filter l sst signals in a frequency band happens, against what other frequencies become closed. It is wOnschenswert that the number of Filterb is more nder (Kan le) in the view to it programmable that different strategies use different number yon filters and the number verf of gbaren Kane abhangt yon the kind of the stimulation, as e.g. single-pole, common earth etc. A filter bank is seen in such a way Oblicherweise that it plans a group in the enterprise continuously yon N paralellen, continuous output signals. The n chste stage in signal processing is Abtastund selection level 23. Generally the assigned speech processing strategy of each of the filter bank output signals scans and determines a sequence yon attraction Frames in this stage. The available invention concerns exactly this Abtastund selection process, and this will be utert below more in detail erl. The n chste stage in signal processing is the loud ramp function (LGF Loudness Growth Function) 24, which essentially to a amplitude Mapping (illustration) is related. This stage bernimmt the information from Abtastund selection block 23 and illustrates it on the patient electrode array. For everyone ausgew hlten attraction wahlt it the Electrode, which is assigned to this frequency, and sets the attraction amplitude on a Hegel, which lies between the Ben tzer threshold value and comfort levels, around which Lautst rke of this frequency component too repr sentieren. In modern systems is the illustration, which becomes specific threshold value and the comfort levels fur the respective BenOtzer, and it either by an automatic process or by a procedure with audiological measurements individually certainly. The last stage of signal processing is the HF-coder 25, that takes up the information of the finished signal, which is sentiert the patient electrode array pr, and it converts into a code, which can become the implantierten Empf nger/Stimulator for a following stimulation by the electrodes of the implantierten electrode array upper stretchers. It will be verstandlich that the latter process itself something of e.g. a altogether implantierten AusfOhrung or one read en i. '. ""…. ::. “!.: .i! drahteten AusfOhrung differentiates. The strategy of the preferential AusfOhrung of the available invention, which is used in Abtastund selection level 23, is described in connection with a simple, one-sided version of this pattern with ten IIR Filterb ndern (IIR filter Infinite of impulses Response filter - recursive filter or IIRFilter), ungefahr 2 to 3 critical Bander broadly and altogether ungef HR 200 to 7000 cycles per second upperstretching everyone, which for the derivation by attraction parameters fur ten firm electrodes are benOtzt. The filters of the descriptive system were laid out for the achievement of compound ripples of less than 2 railways and with 18 railway sinkings beyond the critical frequencies. The scanning rate in the descriptive code amount to ungef HR 16000 cycles per second. that the managing parameters were ausgewahlt, in order the description of the available invention is to be seen to unterstOtzen, and that starting from nderungen this parameter and this kind from AusfOhrung within the framework of the invention it takes place k6nnen. After the audio preprocessing stage the signal is then led by a filter bank with ten IIR Filterb ndern, which split up the signal in ten Bander in accordance with the before specified Frequenzgrenzen. The filtered band-pass filter signal from everyone the bandpass filter is analyzed in order to compute the peak values in a given volume, and the band-pass filter signal is replaced thereafter by the peak values, which it enth. This is durchgefOhrt gema5 the program code of figure 3, as CALCPEAKS (, point computation ") - routine is designated. This routine fOhrt further one, canreinstate - variable (, ability re-establishment variable "), the all points pursues, which were set before-upper-going to zero, since they were too close because of a neighbour point. This occurs, since the available invention no Gl tten the frequency Abschatzungen plans, in order to limit the total rate, but rather a particularly indicated border for the permitted distance between points in a volume uses. This is gewahlt, in order to permit temporal intervals up to ungef to HR 700 s, in order to berbrOcken frequencies, where a temporal distinction at the best one is, and corresponds also ungefahr goes rnerv Unempfindlichkeitszeiten. By pursuing this variable the peak value can be restored, should the Nachoo: : i. oe • • • 0 • 00 • • • • o • • • o • cash-pointed even to zero to be set. The main code of figure 4 fullt then one, total stimulation - buffers by adding the points in each channel into the total buffer, beginning with the lowest Frequenzkanal. If a collision arises and the time slot required by the new channel is filled already in the total buffer, new and old channel regarding frequency and amplitude according to the following rules are compared. For low Frequenzb more nder 1 to 4 (, channel " in the code) has low opposite highly Prioritat, it is the Intensity of the point in the h heren frequency band is at least twice like that gro like the lower frequency. The pulse with the h Priority heren in, total buffers " in the correct time slot are placed. That one with the lower Priority is carried up to the nachsten free slot, up to two time slots to the left or right by the given slot. An alternative and perhaps more exact, however computationally more complex L6sungsansatz consists when inducing the pulse with lower Prioritat of comparing the Priority with neighbour slots instead of holding blo5 after the nachsten free slot look out, in which it is accommodated. For Kane 5 and over it, there this Kane less importantly fur the interaurale Zeitver6gerungs-Wahrnehmung is used and less exact time information contained k6nnen, since the point close delimitation criterion high frequencies chtigt more than low frequencies beeintr, the Intensit tskriterium impossible and it only the frequency Prioritat. Dadutch is avoided that high frequency points distort the more important time coding of the low frequency points, even if it a gr6 ere amplitude has. Figure 5 shows the function of these AusfOhrung of the invention in a schematic 0bersicht. The filter bank 22 delivers a sentence at the exit yon signals according to the interesting, before defined Bandern. These signals are then analyzed ever with 30, in order to detect the points in each volume, with included the time the point and their Intensitat. With 31 the exit of each volume is analyzed, in order to determine whether any points au6erhalb of the assumption parameters fall. The parameters k6nnen for example a minimum Intensit tsschwellenwert contain or to the zulassige close one a criterion referred of the points in the same volume. ::. [...].:.” If one of the points is rejected not accordingly as these parameters, the process a loop fOhrt through, around a new computation durchzufOhren, as soon as this point was unterdrOckt. With 32 those are priorisiert exit of all Bander, in accordance with 6 that managing in the detail described criteria. On the basis of these Priority the peak values in the buffer 33 are placed. Each point is placed in a specific time slot tl, t2 etc. The time slots are hlt according to the criteria erlauterten above ausgew. With 34 the points in the buffer are subjected successively the Lautst rken ramp function 24 in the time slot lining, which described the signal as managing further finished. It should be recognized that also a binaurale version resembled this strategy as m in the eye is seized, and it wOrde two unabhangige units with a microphone behind each ear to contain. FOr optimal bilateral results can be synchronized the scanning with the two microphone signals in this case to mossen. If this is not guaranteed however, the error is probably smaller than (i/Abtastfrequenz), which gew6hnlich in the Gr Senordnung of tenth microseconds is (at least a Gr Senordnung smaller than the stimulation time error in connection with a not-synchronized firm rate or bilateral multi-frequency strategies). It is hnt erw that the top position and the coding pattern are exact within a scanning stimulation interval in each case only. The advantage of the non--synchronisation of the two sides is in the fact that then a rear demo HR (component end - behind the ear) - AusfOhrung without connection between the two sides m resembled is. It will be recognized that the available invention concerns a broad pattern, which can be hrt in different forms ausgef. Variations and HinzufOgungen to the basis pattern, as stated, are m resembled and to expect. i i i PatentansprNche o • • • • • 0 • • • • Ith procedures for the production ven attractions for use in an Cochlear implant, with the steps: Receive an audio signal and its processing around signals within everyone a group yon Frequenzkan len to define; Determine the points in each signal, einschlieSlich the time each point and its Intensity; Priorisieren of each of the points in accordance with B a predetermined instruction set; Place each point in the Prioritats order in a buffer in a time slot according to the time of the point in each channel; and spending a data record for use with producing yon attraction instructions from the buffer. 2. Cochlear Implantateinrichtung with a filter for the receiving of an audio signal and its processing, in order to define signals within everyone a group yon Frequenzkanalen; Verabeitungsmitteln, adapted for determining points in each of the signals, einschlieBlich the time of each Spite and its Intensity, and to the Priorisieren of each channel in responding to a predetermined instruction set; which processing means place further each point in the Prioritats order in a buffer, so that each point in a time slot is placed according to the time of the point in the channel, whereby the exit of the buffer is used for producing yon attraction instructions fur the mechanism. 3. Binaurales Cochlear implant system with two IntracochlearImplantaten, adapted for implantation in the hearing snails of a Ben0tzers, whereby everyone of the Cochlear implants a speech processing strategy benOtzt, with which the electronic attractions to the relative timing of the relevant audio signals, how in each ear detects, are adapted, so that the interauralen Zeitverz6gerungen between the audio signals at each ear will essentially receive in electrical attractions at each ear.