CN205515041U - Cochlea electrode of reinforcing music melody perception is arranged, device and system - Google Patents

Abstract

The utility model discloses a cochlea electrode of reinforcing music melody perception is arranged, device and system, it is on every basilar membrane, according to the characteristic frequency corresponding relation of music note, regional to the music response that the phonosensitive full -band that the cochlear base is corresponding separates into the specific note stimulus signal of response with the cupula cochleae, place a counter electrode who is used for conduction or this frequency band signal of perception in every music response region, in the corresponding characteristic frequency band at music note place is arranged in to every electrode promptly, the electrode falls into two sets ofly, implants corresponding a set of electrode in two snails of picking up the ears respectively. The utility model discloses because the electrode is arranged to be implemented relatively easyly two snails of picking up the ears, and electrode perception music is better arranged to two snails of picking up the ears.

Description

Strengthen the cochlear electrode layout of music rhythm perception, Apparatus and system

Technical field

The utility model relates to artificial cochlea field, is specifically related to strengthen music rhythm perception cochlear electrode layout, device And system.

Background technology

Hearing compensation or reconstruction mainly include hearing aids selection and artificial cave.To bilateral severe or pole severe phonosensitive Nerve Deaf and Hard of Hearing Talents, when using audiphone 3 to 6 months without positive effect, it is contemplated that Cochlear Implantation weight Build hearing.

Artificial cochlea implanting device is the converter of a kind of cochlear function simulating people.Voice signal is passed through at speech by it Reason device is transformed into the signal of telecommunication, and the sensation of frequency of incoming inner ear answers position electrode, with faint stimulation mode (such as electricity, light, thermally or mechanically Pressure etc.) the most excited auditory nerve, thus produce the sense of hearing.Artificial cochlea device mainly divides two large divisions: implant part (includes connecing Receiving apparatus and multilead electrode) and External connecting part (including sound collector, speech processor, transmitter etc.).

According to Auditory Perception principle, the sense of hearing is to be collected conducted acoustic waves, middle ear amplification acoustic vibration signal, Jin Er by external ear Inner ear (i.e. cochlea) is organized in time, frequency by some sense of hearings end acoustic cell (also known as hair cell) of CF corresponding relation And in intensity, it is converted into corresponding acous exciting signal, through auditory nerve granting, conduction, integrate in Brainstem Auditory district, form the sense of hearing Perception.The successful Application of artificial cochlea device this principle just, this device preferably solves reconstruction part hearing ability at present, Such as human speech perception, and for appreciating and the beautiful music information of perception, there is also some problem, have much room for improvement.

Research finds, music signal time, there is larger difference, frequently such as Fig. 1 a-Fig. 1 b institute in distribution character and voice signal Show.For voice signal, the distinguishing characteristics of the pronunciation loud part of word mainly shows as, in spectral envelope peak Distribution, i.e. composing bag Formant centre frequency position, quantity and the intensity of network, usual formant negligible amounts, main less than 5, but each is altogether The peak center frequency location that shakes is uncertain, and each formant broader bandwidth (compares the harmonic spectrum peak bandwidth of music), and wherein comprises Tone information；Unvoiced part the loudest in speech, also mainly represents with wider spectrum energy concentration zones, such as Fig. 1 a " voice " Shown in；In time domain, when people speaks, whether and speed vocal cord vibration, shows as the pitch frequency of correspondence with or without, Yi Jigao Low, for comparing music, excursion is less, is usually no more than 500Hz, but consecutive variations, the pronunciation of every section of meaning of having any different Clip durations does not has rule.On the whole, voice signal principal character frequency is on docking end auditory nerve, to frequency resolution Require relatively low, be mainly manifested in formant distributing position, express the main sound feature of voice segments with how many frequency division bands It it is the key issue solving speech perception.Current artificial cochlea electrode quantity is usually no more than 22, although each producer product Electrod-array be distributed on frequency values corresponding relation and be slightly different, but be substantially in accordance with critical band or frequency masking relation is drawn Point, by voiced sound formant and voiceless sound information in such distribution of electrodes transmission speech, its resolution ratio is the most enough, if but transmission During musical sound information, owing to music signal spectrum structure is different from voice spectrum, the fundamental frequency of a lot of musical tones cannot Accurately conducted by auditory nerve, see table 1 and provide 22 electrode correspondence frequency bands coverings and the note base of certain artificial cochlea's product Ripple frequency coverage (or leap) is generally corresponding to relation, so current cochlear implant is difficult to appreciate music information, to sound Musicality is known the best.

Certain artificial cochlea's product distribution of electrodes of table 1 and be generally corresponding to relation with note fundamental frequency

For musical sound, its sound is from certain musical instrument.All musical instruments with melody performance, its volume up-down is by sound Symbol determines, does not the most include the percussion instrument without melody performance.Its signal spectrum of same note distribution of different instrument playings is Being combined by other subharmonic of essentially identical first-harmonic and different amplitude distribution and constitute, whole spectrum envelope is relatively flat, frequency domain Span is more wider than voice, usually not voice signal spectrum envelope the most obvious multiple formants change, but music signal harmonic wave Quantity is more, and according to note from low to high, its overtone order arrives several times up to tens times, each harmonic peaks narrower bandwidth, Peak separation is the most regular, substantially by fundamental frequency multiple frequency division cloth, as shown in Fig. 1 b music signal spectrogram.The wherein base of note Wave spectrum peak is most important, can not misplace or lack, and otherwise, rebuilds music signal and listens perception to get out of tune；And note corresponding the 2nd, 3,4, 5 ... wait some higher hamonic wave peaks, if lacking indivedual harmonic wave, not interfering with Note Melodic Fragment perception, will not get out of tune, but when lacking relatively Many higher hamonic waves, tonequality has significant change；From low to high, fundamental frequency excursion is very big, from several for the note of music rhythm Ten hertz～a few KHz, as shown in the note frequencies table in table 2.1 or table 2.2.It addition, in time domain, the length of each note Short, i.e. interval, is regular change by beat, can be controlled by by signal time coding.Therefore, artificial cochlea is planted For the person of entering, the perception of musical sound, the distribution of electrodes density docked with auditory nerve has direct relation.

At present, artificial cochlea the perception of music is existed of both problem:

1, should match by the frequency band corresponding with cochlear electrode after sound source signal being carried out outside collection, conversion, and this skill The problem that art presently, there are be external conversion note signal by signal analysis filtering process after, each band component is being delivered to During cochlear electrode, owing to current distribution of electrodes position cannot be directed at the frequency district of cochlea perception music, make music frequency information wrong Position or lose ground transmission, is to cause implantation person to Music perception imbalance or cannot the main cause of perception.

2, in unilateral cochlear, the perception to music is realized by the enough number of electrodes modes of increase, although in theory may be used With realization (having Patents at present open), but, it being limited to current technology and limit, unilateral cochlear is distributed too much electrode will Cause being difficult in technique.

Utility model content

For solving the deficiency that prior art exists, the open cochlear electrode cloth strengthening music rhythm perception of the utility model Put, system and method, the utility model with reference to musical tones first-harmonic characteristic distributions, improves in cochlea by suitably increasing number of electrodes Frequency induction density, use bilateral cochlear location mode, to guarantee technique realize and improve the sense to music information of the single, double ear Know the most effective.

For achieving the above object, concrete scheme of the present utility model is as follows:

The cochlear electrode array strengthening music rhythm perception is arranged, near the basilar membrane of every side, according to musical tones Characteristic frequency corresponding relation, cupula cochleae to phonosensitive Whole frequency band corresponding at the bottom of snail is separated into response particular note frequency field； Placing the electrode of this band signal in each frequency field, the most each electrode is placed in the feature band at musical tones place In, utilizing the feature of ears two-channel, electrode is divided into two groups, bilateral ear uses equal point-score arrange, and electrode or major-minor method are arranged Electrode, both sides cochlea respectively implants corresponding one group of electrode.Wherein, each electrode is the most right from the fundamental frequency of different notes point Should, electrode is conduction or stimulating electrode.

Further, when electrode is arranged, arranging electrode for equal point-score, electrode is divided into two groups, one group of electrode is planted Entering in the cochlea of side, another group electrode is implanted in opposite side cochlea, at the frequency band set, waits pitch interleaved to be grouped layout Electrod-array.

Further, in bilateral cochlear, in addition to low frequency range, remaining frequency zones implants 33 electrodes of equal number respectively；

Wherein side, the electrode lay-out implanted in cochlea is:

First electrode is corresponding with the fundamental frequency of B8 note；The fundamental frequency phase of the 33rd electrode and G3 note Correspondence, the electrode between first electrode and the 33rd electrode is arranged by a whole pitch frequencies interval.

33 electrode lay-outs that in opposite side cochlea, remaining frequency zones is implanted in addition to low frequency range are:

First electrode is corresponding with the fundamental frequency of C9 note；The first-harmonic frequency of the 33rd electrode and G#/Ab3 note Rate is corresponding, and the electrode between first electrode and the 33rd electrode is also according to a whole pitch note frequencies interval cloth Put.

Further, at low frequency range, owing to the lowest note frequencies interval is little, it is difficult to arrange multi-electrode, the most very Low note the most less, therefore choose setting and represent frequency, it is arranged in relevant position near bilateral cochlear cupula cochleae, As: 3 electrodes of mark near table 2.1 low frequency range.

Further, low frequency range 3 electrodes respectively: the 36th electrode is relative with the fundamental frequency of A1 note Should, the 35th electrode is corresponding with the fundamental frequency of E2 note, the fundamental frequency phase of the 34th electrode and C3 note Corresponding.

Further, electrode is arranged for major-minor method, bilateral cochlear is implanted the electrode of varying number, wherein side respectively One group of electrode that ear is arranged is master, and another one group of electrode picking up the ears to arrange is auxiliary side, at the frequency band set, by assigned frequency Interleaved packet layout electrod-array, wherein an electrode picking up the ears to arrange is master, opposite side and the electrode arranged is auxiliary side.

Further, when implanting the electrode of varying number in the cochlea of both sides respectively, side correspondence cochlea main frequency senses District's distribution " main electrode group ", totally 38, opposite side correspondence cochlea main frequency induction zone distribution " auxiliary electrode group ", totally 27.

Wherein side cochlea, the main electrode group layout of distribution is:

First electrode is corresponding with the fundamental frequency of B8 note；The fundamental frequency phase of the 38th electrode and G3 note Correspondence, the electrode between first electrode and 38 electrodes is arranged with setting means according to note frequencies corresponding relation；

Implanting auxiliary electrode group in opposite side cochlea, layout is:

First electrode is corresponding with the fundamental frequency of A#/Bb8 note；27th electrode and the base of G#/Ab3 note Ripple frequency is corresponding, the electrode between first electrode and 27 electrodes according to note frequencies corresponding relation with setting means Arrange.

Further, at low frequency range, choose and represent the frequency corresponding electrode of layout accordingly, implant both sides cochlea respectively, Both sides are distributed identical 3 electrodes.

Further, in low frequency district, 3 electrodes respectively: the base of the 41st electrode of main electrode group and A1 note Ripple frequency is corresponding, and the 40th electrode is corresponding with the fundamental frequency of E2 note, the 3rd nineteen electrode and the base of C3 note Ripple frequency is corresponding；The 30th electrode of auxiliary electrode group is corresponding with the fundamental frequency of A1 note, the second nineteen electrode and E2 The fundamental frequency of note is corresponding, and the 28th electrode is corresponding with the fundamental frequency of C3 note.

Strengthening the cochlear electrode array device of music rhythm perception, including multiple electrodes, each electrode includes multiple ring-type Electrode contacts, ring electrode contact is all connected with electrode loop by the wire of tape insulation layer, and described electrode also includes parcel The flexible covering of all electrode loops, described electrode is arranged to array according to above-mentioned electrode arrangement mode.

Strengthen the artificial cochlea system of music rhythm perception, including implant part and External connecting part, implant part and external Part can use radio communication connected mode or wired connection mode, and wherein implant part at least includes electrode array device, outward Connecing part and at least include Sound Processor Unit and the voice collection device being connected with processor, voice signal is obtained by voice collection device Taking, processor complete the thematic note of music signal, the analysis of interval and coding, it is right that processor produces according to musical instrument kind The MIDI music encoding answered, is converted into snail electrode stimulating coding signal of respectively picking up the ears, drives through radio communication or special wireline interface, Send to stimulation location.

Further, for radio communication connected mode, electrode array device and reception device planting as artificial cochlea Entering part, transmitter, processor and voice collection device are as the External connecting part of artificial cochlea.

Further, for wired connection mode, electrode array device is as the implant part of artificial cochlea, wireline interface Device, signal driving means, processor and voice collection device pass as External connecting part, the signal gathered through voice collection device Transport to processor, the processor signal to obtaining, produce the transmission of corresponding signal to signal driving means, letter through decomposing, quantifying Number driving means is by driving each road signal produced to transmit to wireline interface device, at wireline interface device, each road signal with The signal docking of implant electrode each road, to produce corresponding stimulus signal.

Further, implant part and External connecting part communication can be Blue-tooth communication method, infrared communication side Formula or RF radio communication mode, wired connection mode can be the attachment structure with flexible material parcel；Attachment structure can be light Attachment structure, thermally coupled structure or mechanical connecting structure.

Strengthen the cochlear electrode method for arranging of music rhythm perception, comprise the following steps:

Electrode being divided into two groups, implants corresponding one group of electrode in bilateral cochlear respectively, each electrode is placed in musical tones In the character pair frequency band at place, the main centralized arrangement of electrode is at 100Hz-8000Hz main frequency induction zone, in low frequency district Territory, chooses and represents frequency layout electrode accordingly；

For equal point-score, when electrode is divided into quantity identical two groups, at main frequency induction region, electrode in snail of often picking up the ears By interlocking about note first-harmonic characteristic frequency, being equidistantly spaced from；In major-minor method, when electrode is divided into two groups of quantity not grade, often Electrode in snail of picking up the ears is arranged with setting means according to note first-harmonic characteristic frequency.

Strengthen the method for work of the artificial cochlea system of music rhythm perception, comprise the following steps:

The signal gathered through voice collection device transmits to processor, processor complete the thematic sound of music signal Symbol, the analysis of interval and coding, wherein processor can produce corresponding MIDI music encoding according to musical instrument kind, by with pattern Corresponding Processing Algorithm processes；

Processor, according to electrode mode of operation, determines each note effective working electrode position, determine every side array and each Electrode coded sequence；

Processor is processed by the Processing Algorithm corresponding with pattern, is converted into snail electrode stimulating coding signal of respectively picking up the ears, warp Radio communication or special wireline interface drive, and send to stimulation location.

The beneficial effects of the utility model:

The utility model provides bilateral cochlear implant electrode method for arranging, divides by note characteristic frequency half pitch, corresponding Musical sound and the most frequently used frequency band of speech (about 100Hz-8000Hz), wait pitch interleaved (i.e. all point-scores) or hand over by assigned frequency Wrong (the most major-minor method) is grouped in ears layout electrod-array, and bulk is difficult to be distributed the low end frequency district of multifrequency point, only Choose and represent frequency, be distributed in master or double sided electrode array, rebuild and strengthen music and speech perception；The utility model because of It is arranged in bilateral cochlear, the ratio unilateral cochlear distribution easy realization of so many electrode sum, and this distribution of electrodes side for electrode Method both can unilateral adapted, also can bilateral adapted simultaneously, make use of the synergistic effect of ears phonosensitive, make the implantation person can preferably perception Music.

Distribution of electrodes after optimization, owing to considering the distribution of musical sound frequency occupy-place, it is close that snail of often picking up the ears all improves electrode Degree, can strengthen Music perception, and the method covers original voice electrode frequency simultaneously, even if the work of adapted any one lateral electrode, logical Cross outer link voice processor operating mode and the selection of sound coding strategy, switching, it is ensured that the speech perception that the method produces It is not less than the speech perception that current distribution of electrodes method obtains.Thus, the utility model is to strengthening artificial cochlea's perception more Abundant musical sound effects has practical significance.

Accompanying drawing explanation

Fig. 1 a voice signal time, distribution character frequently；

Fig. 1 b music signal time, distribution character frequently；

Fig. 2 a wireless transmission method one side or bilateral artificial cochlea system structured flowchart；

Fig. 2 b wired connection mode one side or bilateral artificial cochlea system structured flowchart；

Fig. 3 each lateral electrode system signal processing flow block diagram；

Fig. 4 every lateral electrode array structure schematic diagram；

Fig. 5 bilateral ear superposition musical sound analog synthesis signal waveform；

The oscillogram that in Fig. 6 examples of implementation, one section of music rhythm is corresponding,

In figure, 1, ring electrode contact, 2, the wire of tape insulation layer, 3, flexible covering, 4, electrode guide interface.

Detailed description of the invention:

Below in conjunction with the accompanying drawings the utility model is described in detail:

As having analysis or the cochlea of induction frequencies composition function, the hair cell (i.e. acoustic cell) on its basilar memebrane and end End auditory nerve is connected, and the topology location in cochlea and frequency content have corresponding relation.If wishing, brain listens district's accurate reconstruction sound Happy perception, makes cochlear implant can experience the beautiful of music rhythm, should increase number of electrodes and dock with corresponding auditory nerve. But being limited to excessive number electrode and be difficult at side cochlea implantation, it is folded that the utility model utilizes human ear to have bilateral cochlear and ears to have Add inductive effect, select frequency values with equal point-score and major-minor method, in corresponding cochlea, be distributed stimulating electrode, with right on topology location Connect end auditory nerve.

Table 2.1 is equal point-score middle pitch symbol frequency correspondence signal table, and during bilateral is arranged, wherein medium-high frequency electrode in side is corresponding Note frequencies is thickened portion, and the note frequencies that opposite side medium-high frequency electrode is corresponding is italicized item, during bilateral is arranged, and low frequency portion The common electrode correspondence note frequencies that distribution is put is that overstriking underlines part.

In equal point-score, double sided electrode is when specifically arranging, the physical relationship of electrode and note frequencies is shown in Table 3.1 and table 3.2。

Table 2.2 is note frequencies correspondence signal table in major-minor method, and wherein, the note frequencies that master medium-high frequency electrode is corresponding is Thickened portion；The note frequencies that auxiliary side medium-high frequency electrode is corresponding is italicized item；The layout electrode diaphone that low frequency part is common Symbol frequency is that overstriking underlines part.

In major-minor method, major-minor lateral electrode is when specifically arranging, the physical relationship of electrode and note frequencies is shown in Table 3.3 and table 3.4。

(low frequency has table 2.1 equal division methodology note frequencies correspondence table: black matrix+lower stroke for side: black slightly, opposite side: italic Line)

Table 2.2 " major-minor method " note frequencies correspondence table (master: black；Auxiliary side: italic；Low frequency has: black matrix+underscore)

Table 3.1 bilateral equal point-score side distribution of electrodes

Table 3.2 bilateral equal point-score opposite side distribution of electrodes

Table 3.3 major-minor method master distribution of electrodes

The auxiliary lateral electrode of the major-minor method of table 3.4 is distributed

As shown in Figure 4, the cochlear electrode array device of music rhythm perception is strengthened, including multiple electrodes, each electrode bag Including multiple ring electrode contact 1, ring electrode contact 1 is all connected with electrode loop by the wire 2 of tape insulation layer, and electrode returns Road includes that electrode guides interface 4, and described electrode also includes the flexible covering 3 wrapping up all electrode loops, when electrode is arranged, and will Electrode is divided into two groups, and both sides cochlea respectively implants corresponding one group of electrode, utilizes the feature of ears two-channel, uses bilateral ear all Sub-electrode is arranged or major-minor electrode is arranged.Wherein, each electrode is generally corresponding to from the fundamental frequency point of different notes.

As shown in Fig. 2 a-Fig. 2 b, electrode is used for artificial cochlea system, including implant part when implementing by the utility model And External connecting part, implant part includes that the electrode array device arranged in the manner described above, implant part and External connecting part are wireless During communication, electrode array device is connected with receiving device, and External connecting part includes that the transmitter being sequentially connected with, processor and sound are adopted Acquisition means.The signal gathered is transmitted to processor by voice collection device, and after processor process further to signal, transmission is to sending out Emitter, the signal after transmitter will process wirelessly sends to receiving device, receives device according to the signal received The action of trigger electrode, the action of respective electrode is so that human ear can hear corresponding music signal.

When implant part and External connecting part wire communication, electrode array device is implant part, and External connecting part includes successively Wireline interface device, signal driving means, processor and the voice collection device connected.The signal that voice collection device will gather Transmission, to processor, is transmitted after processor process further to signal to signal driving means, after signal driving means will process Signal by wireline interface device send to electrode array device, electrode array device is according to the signal trigger electrode received Action, the action of respective electrode is so that human ear can hear corresponding music signal.

Wherein, the processor outside ear by the parsing to music signal, can be converted to the MIDI coded data of music, these lattice The data of formula can drive the stimulus signal of corresponding each path electrode.Obviously, the electrode method of more dense distribution, it is the most right to be possible not only to Answer each frequency of musical tones, make cochlear implant can accurately obtain note and harmonic information, and to phonetic feature frequency According to " mapping nearby " principle, the transmission of rate, can determine that from more dense electrode working electrode, corresponding employing speech process Coding strategy, therefore this electrode method for arranging and system have taken into account the transmission of voice messaging, do not interfere with speech perception.But, According to original less electrode, musical tones is used mapping transmission, even if external Sound Processor Unit Exact Solutions separates out note Symbol information, internal cochlear electrode also accurately cannot dock auditory nerve by corresponding frequency, pass to brain, and Music perception is still that disappearance 's.This also illustrates, the most current artificial cochlea cannot preferably perception music.

Experimental study also finds, human ear has bilateral ear phonosensitive superimposed characteristics, and this characteristic not only contributes to differentiate sound source, improves Sound source direction ability, also can integrate brain stem district audio, can increase the loudness of sound and superposition music rhythm and harmonic information.

In artificial cochlea system, the signal processing flow of each lateral electrode is as shown in Figure 3:

Step one: determine each note of music, interval (similar MIDI encodes information)；

Step 2: determine fundamental frequency and the harmonic frequency of each note；

Step 3: determine music tamber, regulates coefficient correlation；

Step 4: according to electrode mode of operation, including dividing equally bilateral pattern, major-minor bilateral pattern, divide equally one-sided mode and Major-minor one-sided mode, music pattern/speech pattern etc., determine each note effective working electrode position, wherein according to multiple principle Or strategy processes, as critical band, note are corresponding nearby regardless of side, homonymy and suitably give up.

Step 5: determine working electrode position, every side and each electrode signal coded sequence；

Step 6: drive or transfer electron coding, generation stimulation pulse signal.

In examples of implementation, for music rhythm multichannel superposition perceived effect, we have done special simulation analysis, false If artificial cochlea's optimal recovery effect is up to normal human ear binaural perceptual, therefore normal human ear is used to emulate.As it is shown in figure 5, upper, The lower two waveforms voice signal time domain waveform that respectively left and right sound channels cochlea is heard, its top L channel waveform, for left ear electricity Pole synthesis of artificial sound, including first-harmonic and the synthesized voice signal of major harmonic of corresponding note；Its underpart is R channel waveform, For auris dextra electrode synthesis of artificial sound, including first-harmonic and the synthesized voice signal of major harmonic of corresponding note.Thus left and right sound Road alternately transmits synthesis, the music listening district to hear at brain, and the melody perception of its tune is complete, accurately.

The results show, two-channel technology can transmit the more subband feature of music signal, can be more accurately, easily Transmission first-harmonic and crucial harmonic components, in a disguised form add the electrode number of artificial cochlea.

The tone of musical tones is mainly determined by fundamental frequency, and the tone color of note then determines according to spectral characteristic, i.e. root How much determine with harmonic wave ratio and harmonic wave according to first-harmonic.The electrode layout of this patent is exactly first all musical tones tables Reach required fundamental frequency position distribution good, and be divided into two component sides to arrange, to reduce single-sided electrode number, reduce and arrange difficulty Degree, then first-harmonic and harmonic frequency to certain note to be expressed are mapped on the electrod-array of side according to certain principle, from And guaranteeing that same note works in a lateral electrode, different notes can be expressed at different lateral electrode arrays, to realize whole music The melody of Duan Caiyong bilateral alternately synthesis audio processes strategy.In actual corresponding conversion, expression, a few harmonics centre frequency can Can meeting " fall " on opposite side electrode position nearby, " homonymy is nearby " or " suitably giving up " principle for this situation, can be taked It is acted upon.

In order to better illustrate the effect that electrode arrangement mode of the present utility model is reached, the utility model gives separately One examples of implementation:

Based on above-mentioned two-channel cochlear electrode method for arranging, artificial cochlea's musical sound processor is according to electrode mode of operation And coding strategy, produce counter electrode stimulus signal by Fig. 3 signal processing flow, wherein note is the lowest, at Music perception frequency band In the range of its harmonic wave number the most, corresponding stimulating electrode number should be the most, and note is the highest, and its harmonic number is the fewest, effective stimulus electrode Number is the fewest.When determining each note working electrode, according to critical band principle, determine each effective working electrode, i.e. first-harmonic and Each electrode of the same side cochlea that effectively harmonic wave is accurate or approximation is corresponding, wherein may give up indivedual harmonic wave, if approximation is to separately The harmonic wave of one lateral electrode.This analysis and process work are completed by external Sound Processor Unit.

Due to different musical instrument kinds, the amplitude mutual ratios relation of its harmonic components is different, generally need to be according to musical instrument Kind is done suitable parameter and is adjusted.

With the working condition of prescribed electrode for one section of simple melody:

Choose one section of music rhythm, be made up of three notes, be A3, G3, C4 successively, it is assumed that each note interval is equal, signal Waveform is as shown in Figure 6.

First the first-harmonic of note is determined, then according to Fig. 3 handling process and coding strategy (i.e. critical band restriction, same sound The harmonic wave of symbol determines working electrode at homonymy, gives up not homonymy harmonic wave counter electrode etc.) process, distribute this note first-harmonic and each The alternate electrode of harmonic wave, such as table 4.1, table 4.2, table 4.3, to stimulate auditory nerve system, it is ensured that the music signal of same note is not Divide side docking auditory nerve to stimulate, do not destroy each note perception globality.So, each note determines each work electricity in side Pole, different notes, may be at homonymy or not in homonymy alternation, complete music rhythm is by bilateral cochlear electrod-array Acous Overlay is stimulated to obtain Music perception.

If working under bilateral divides equally electrode mode, to melody section A3, G3, C4, wherein the 1st, 2 notes in side, the 3rd sound Accord with and working at opposite side electrode, such as the electrode case that table 4.1 provides the 1st (A3), 2 (G3) note works successively in side, table 4.2 Provide the 3rd the note C4 working condition at opposite side electrode.

If at major-minor double sided electrode MODE of operation, this melody section A3, G3, C4, owing to fundamental frequency is distributed with at master, then three Individual note works successively on master cochlear electrode, specific works situation such as table 4.3.

Table 4.1 the 1st (A3), 2 (G3) note working electrode (in side) successively under dividing equally binaural mode

Table 4.2 the 3rd note (C4) working electrode (opposite side) under dividing equally binaural mode

Table 4.3 the 1st (A3), 2 (G3), 3 (C4) note are major-minor method bilateral MODE of operation electrode (successively at master)

It addition, along with the development of technology, when cochlear electrode layout is not realized technique limitation, all in table 2.1 table 2.2 The equal layout of frequency is ideal design in unilateral cochlear, and when all electrodes are arranged in monaural, above-mentioned artificial cochlea fills Put and optimize system accordingly and be still suitable for.

Although detailed description of the invention of the present utility model is described by the above-mentioned accompanying drawing that combines, but not new to this practicality The restriction of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability Field technique personnel need not to pay various amendments or deformation that creative work can make still at protection model of the present utility model Within enclosing.

Claims (10)

1. strengthen the cochlear electrode array of music rhythm perception, it is characterized in that, be included in each frequency field one placed The electrode of this band signal, the most each electrode is placed in the feature band at musical tones place；Described frequency field is in every side Near basilar membrane, according to the characteristic frequency corresponding relation of musical tones, cupula cochleae is divided to phonosensitive Whole frequency band corresponding at the bottom of snail It is divided into the frequency field of response particular note；

Utilizing the feature of ears two-channel, described electrode to include two groups, described electrode is to use equal point-score to arrange in bilateral ear The electrode that electrode or major-minor method are arranged, both sides cochlea respectively implants corresponding one group of electrode.

2. the cochlear electrode array structure strengthening music rhythm perception as claimed in claim 1, is characterized in that, for equal point-score cloth The electrode put, described electrode includes two groups divided equally, and one group of electrode is implanted in the cochlea of side, and another group electrode is implanted another and picked up the ears In snail, at the frequency band set, pitch interleaved is waited to be grouped layout electrod-array.

3. the cochlear electrode array strengthening music rhythm perception as claimed in claim 2, is characterized in that, except low in bilateral cochlear Frequently beyond district, remaining frequency zones implants 33 electrodes of equal number respectively；Wherein side, the electrode lay-out structure implanted in cochlea It is: first electrode is corresponding with the fundamental frequency of B8 note；33rd electrode is corresponding with the fundamental frequency of G3 note, Electrode between first electrode and the 33rd electrode is arranged by a whole pitch frequencies interval；Except low in opposite side cochlea Frequently 33 electrode lay-outs that beyond district, remaining frequency zones is implanted are: first electrode is corresponding with the fundamental frequency of C9 note；The 33 electrodes are corresponding with the fundamental frequency of G#/Ab3 note, the electrode between first electrode and the 33rd electrode Arrange also according to a whole pitch note frequencies interval.

4. the cochlear electrode array strengthening music rhythm perception as claimed in claim 3, is characterized in that, at low frequency range, and, double Relevant position near snail cupula cochleae of picking up the ears is respectively disposed with the setting 3 chosen and represents frequency；3 electrodes difference at low frequency range It is: the 36th electrode is corresponding with the fundamental frequency of A1 note, the fundamental frequency phase of the 35th electrode and E2 note Correspondence, the 34th electrode is corresponding with the fundamental frequency of C3 note.

5. the cochlear electrode array strengthening music rhythm perception as claimed in claim 1, is characterized in that, arrange for major-minor method Electrode, bilateral cochlear implants the electrode of varying number respectively, wherein an one group of electrode picking up the ears to arrange is master, opposite side One group of electrode that ear is arranged is auxiliary side, at the frequency band set, is grouped layout electrod-array by assigned frequency interleaved, wherein One electrode picking up the ears to arrange is master, opposite side and the electrode arranged is auxiliary side.

6. the cochlear electrode array strengthening music rhythm perception as claimed in claim 5, is characterized in that, in the cochlea of both sides respectively When implanting the electrode of varying number, side correspondence cochlea main frequency induction zone distribution " main electrode group ", totally 38, opposite side pair Cochlea main frequency induction zone is answered to be distributed " auxiliary electrode group ", totally 27；Wherein side cochlea, the main electrode group layout of distribution is: First electrode is corresponding with the fundamental frequency of B8 note；38th electrode is corresponding with the fundamental frequency of G3 note, the Electrode between one electrode and 38 electrodes is arranged with setting means according to note frequencies corresponding relation；

Implanting auxiliary electrode group in opposite side cochlea, layout is: first electrode is corresponding with the fundamental frequency of A#/Bb8 note；The 27 electrodes are corresponding with the fundamental frequency of G#/Ab3 note, and the electrode between first electrode and 27 electrodes is pressed Arrange with setting means according to note frequencies corresponding relation.

7. the cochlear electrode array strengthening music rhythm perception as claimed in claim 6, is characterized in that, in low frequency range, both sides Cochlea is implanted with respectively choosing and represents the corresponding electrode that frequency is arranged accordingly, and both sides are distributed identical 3 electrodes；Low frequency District, 3 electrodes respectively: the 41st electrode of main electrode group is corresponding with the fundamental frequency of A1 note, the 40th electrode Corresponding with the fundamental frequency of E2 note, the 3rd nineteen electrode is corresponding with the fundamental frequency of C3 note；Auxiliary electrode group the 3rd Ten electrodes are corresponding with the fundamental frequency of A1 note, and the second nineteen electrode is corresponding with the fundamental frequency of E2 note, and second 18 electrodes are corresponding with the fundamental frequency of C3 note.

8. strengthening the cochlear electrode array device of music rhythm perception, it is characterized in that, including multiple electrodes, each electrode includes many Individual ring electrode contact, ring electrode contact is all connected with electrode loop by the wire of tape insulation layer, and described electrode also wraps Including the flexible covering wrapping up all electrode loops, described electrode is to constitute the arbitrary described enhancing music of the claims 1-7 Electrode in the cochlear electrode array of melody perception.

9. strengthen the artificial cochlea system of music rhythm perception, it is characterized in that, including implant part and External connecting part, implant part Can use radio communication connected mode or wired connection mode with External connecting part, wherein implant part at least includes that electrode array is equipped Putting, electrode array device uses the cochlear electrode array device strengthening music rhythm perception described in claim 8, External connecting part At least including Sound Processor Unit and the voice collection device being connected with processor, voice signal is obtained by voice collection device, by Processor completes the thematic note of music signal, the analysis of interval and coding, and processor produces correspondence according to musical instrument kind MIDI music encoding, is converted into snail electrode stimulating coding signal of respectively picking up the ears, drives through radio communication or special wireline interface, send to Stimulation location.

10. the artificial cochlea system strengthening music rhythm perception as claimed in claim 9, is characterized in that, for radio communication Connected mode, electrode array device and reception device are as the implant part of artificial cochlea, transmitter, processor and sound collection Device is as the External connecting part of artificial cochlea；Implant part and External connecting part communication can be Blue-tooth communication method, Over the horizon communication system or RF radio communication mode, the attachment structure that wired connection mode employing is wrapped up with flexible material；For having Line connected mode, electrode array device is as the implant part of artificial cochlea, wireline interface device, signal driving means, process Device and voice collection device are transmitted to processor as External connecting part, the signal gathered through voice collection device, and processor is to obtaining The signal arrived, sends to signal driving means through decomposing, quantify the corresponding signal of generation, and driving is produced by signal driving means Each road signal transmits to wireline interface device, and at wireline interface device, each road signal road each with implant electrode signal docks, To produce corresponding stimulus signal.