EP0984665B1 - Dispositif transducteur pour prothèse auditive partiellement ou totalement implantée - Google Patents

Dispositif transducteur pour prothèse auditive partiellement ou totalement implantée Download PDF

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Publication number
EP0984665B1
EP0984665B1 EP98121613A EP98121613A EP0984665B1 EP 0984665 B1 EP0984665 B1 EP 0984665B1 EP 98121613 A EP98121613 A EP 98121613A EP 98121613 A EP98121613 A EP 98121613A EP 0984665 B1 EP0984665 B1 EP 0984665B1
Authority
EP
European Patent Office
Prior art keywords
transducer
housing
piezoelectric element
frequency
coupling element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98121613A
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German (de)
English (en)
Other versions
EP0984665A3 (fr
EP0984665A2 (fr
Inventor
Hans Dr.-Ing. Leysieffer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Implex AG Hearing Technology
Original Assignee
Phonak AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Phonak AG filed Critical Phonak AG
Publication of EP0984665A2 publication Critical patent/EP0984665A2/fr
Publication of EP0984665A3 publication Critical patent/EP0984665A3/fr
Application granted granted Critical
Publication of EP0984665B1 publication Critical patent/EP0984665B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/02—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/67—Implantable hearing aids or parts thereof not covered by H04R25/606
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
    • H04R25/606—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window

Definitions

  • the present invention relates to a converter for partially or fully implantable hearing aids for direct mechanical excitation of the middle or inner ear, provided with a fixable at the implantation housing and a movable with respect to the housing, mechanically rigid coupling element, wherein housed in the housing, a piezoelectric element is, with which the coupling element can be set in vibration, which are transmitted to a middle ear ossicle or directly to the inner ear after implantation of the transducer.
  • Such a converter is off EP 0 499 940 known.
  • a wall of the housing as a vibratable membrane, which constitutes an electromechanically active heteromorph composite element with a piezoelectric ceramic disk applied on the inside.
  • the coupling element driven via the piezoelectric ceramic disc causes deflections at low frequencies to be transmitted to the middle ear ossicle or directly to the inner ear, which contribute to an adequate volume level medium and larger hearing losses may be insufficient. This applies in particular to the low electrical voltages prescribed for an implant.
  • a disadvantage of such electromagnetic transducers is that the deflection at high frequencies may be too low to achieve a sufficient volume level.
  • the electrical impedance also increases due to the inductive component.
  • Broadband electromagnetic systems for example systems that allow transmission up to 10 kHz, therefore have a high energy requirement compared to piezoelectric systems.
  • an electromagnet assembly which has a fixed with respect to the housing component and a vibratable component, which with the coupling element in such a connection is that vibrations of the oscillatory component are transmitted to the coupling element.
  • the solution according to the invention has the advantage that the frequency response of the transducer can be improved both with respect to purely piezoelectric as well as against purely electromagnetic systems, so that an adequate hearing impression is made possible at a sufficient volume level.
  • a substantially flat frequency response of the deflection of the coupling element in a wide frequency band at sufficiently high stimulation levels and low power consumption can be realized.
  • a wall of the housing can be designed as a vibratable, in particular circular metallic, membrane, on the inside of which the piezoelectric element is applied and with whose outside the coupling element is connected.
  • the composite of the passive membrane and the active, preferably disc-shaped, piezoelectric element forms a heteromorphic, piezoelectric bending oscillator, in which the resulting by applying an electrical voltage to the piezoelectric plate resulting theoretical change in radius of the piezoelectric disk in a bending of the composite element perpendicular to the plate plane becomes. This allows the achievement of large deflections at low voltages, especially when the piezoelectric element is formed as a thin disk.
  • a permanent magnet may be connected, which forms the oscillatory component of the electromagnet assembly, wherein an electromagnetic coil is fixedly mounted in the housing to set the permanent magnet in vibration.
  • a modified embodiment may also be connected to the piezoelectric element facing side of the membrane, a permanent magnet which extends through a preferably central opening of the piezoelectric element and which forms the oscillatory component of the electromagnet assembly, wherein an electromagnetic coil is fixedly mounted in the housing to vibrate the permanent magnet.
  • a control arrangement may be provided which selectively causes the piezoelectric element and / or the electromagnet assembly to vibrate. This allows an optimization of the frequency response of the converter.
  • FIG. 1 an implantable transducer 10 of a hearing aid for direct mechanical excitation of the middle or inner ear is shown.
  • a non-illustrated, designed as a microphone 12 transducer which is preferably implantable.
  • the transducer 10 has a hermetically sealed, biocompatible, cylindrical housing 14 of electrically conductive material, such as titanium, which is filled with inert gas 16.
  • An end wall of the housing 14 is designed as a vibratory, electrically conductive membrane 18, which is provided on its outer side with a coupling element 20 for mechanical vibration coupling to a middle ear ossicle or directly to the inner ear.
  • the membrane 18 On its inside, the membrane 18 is provided by means of an electrically conductive adhesive bond with a thin disc 22 of piezoelectric material, such as lead zirconate titanate (PZT), which is contacted with a thin flexible wire 24 which via a hermetic passage 26 to a lying outside the housing 14 terminal 28 is guided.
  • PZT lead zirconate titanate
  • the ground pole of the terminal 28 is guided via the passage 26 to the inside of the housing 14.
  • the application of an electrical voltage to the terminal 28 causes a bending of the hetero-composite of membrane 18 and piezo disc 22 and thus leads to a deflection of the membrane 18, which is transmitted via the coupling element 20 to a middle ear ossicle or directly on the inner ear ,
  • the coupling element 20 may in particular be designed as a coupling rod and be connected to the ossicle chain, for example via a thin wire or hollow wire bow or a bracket made of a carbon fiber reinforced composite material. Suitable arrangements of this type are in the older DE patent application 197 38 587.7 explained in more detail.
  • the piezoelectric disk 22 is firmly connected on its side facing away from the membrane 18, for example by means of an adhesive, welding or soldered connection with a permanent magnet 30, which dips into a coil or coil winding 32 and slidable therein is.
  • the coil 32 is fixedly connected to the housing 14. Via outgoing through the passage 26 outward wires 34, the coil 32 is connected to a lying outside of the housing 14 terminal 36.
  • Excitation of the coil 32 by applying an AC voltage to the terminal 36 causes a displacement of the Permanent magnet 30 relative to the fixed housing coil 32 and thus a deflection of the membrane 18, which is superimposed if necessary with a caused by the simultaneous application of a voltage to the piezoelectric disc 22 membrane deflection.
  • the frequency response of the transducer 10 can be improved by the sole or additional application of a corresponding signal voltage to the coil 32 via the terminals 36.
  • FIG. 2 provided schematically wiring.
  • the sound signal to be transmitted is converted by a microphone 12 into an electrical signal, which is filtered in a signal processing stage 38 and amplified.
  • the output signal of the stage 38 is applied to two parallel filter stages 40, 42, which are respectively connected upstream of a power amplifier 44 and 46, respectively.
  • the power amplifiers 44, 46 are connected to the terminals 36 and 28 of the coil 32 and the piezo disk 22, respectively.
  • a microcontroller 48 is provided for controlling the stages 38 and 40, respectively, wherein the microcontroller receives from the stage 38 information regarding the spectral composition of the signal currently being processed there.
  • an implantable battery or accumulator unit 50 is preferably provided for the power supply of the microphone 12, the stages 38, 40, 42, the microcontroller 48 and the power amplifier 44, 46.
  • the micro-controller 48 controls the filter stages 40, 42 such that either the piezo disk 22 and / or the coil 32 are selectively excited with the signal to be transmitted in dependence on the frequency or frequency center of the signal currently being processed in the stage 38.
  • the micro-controller 48 may be designed such that in a first frequency band which extends from a first frequency f 1 of the oscillations to be generated on the coupling element 20 up to a separation frequency f T , the coil 32 is excited, and in a second Frequency band which ranges from the separation frequency f T to a second frequency f 2 of the oscillations to be generated on the coupling element which is greater than the first frequency f 1 , the piezo disc 22 is excited.
  • the microcontroller 48 is preferably programmable with respect to the separation frequency f T.
  • the electromagnetic transducer (coil 32) and the piezoelectric transducer (disc 22) are galvanically decoupled. This allows, for example, the use of dual-bridge amplifiers for driving the two transducers 22 and 32nd
  • FIG. 3A and 3B two embodiments are shown in which is dispensed with a separate control of the electromagnetic transducer and the piezoelectric transducer in favor of a simplification of the total converter.
  • the electromagnetic transducer and the piezoelectric transducer can be used in a parallel circuit ( FIG. 3A ) or a series connection ( FIG. 3B ).
  • the electrical signal generated by the microphone 12 is filtered and amplified in the stage 38 controlled by the microcontroller 48.
  • the output signal can now be fed directly to a power amplifier 162, which is connected to the terminals 160 without further filter stages.
  • the frequency response of the transducer 10 thus results from the superposition of the frequency responses of the piezoelectric transducer and the electromagnetic transducer, whereby both with an appropriate choice of the design of the mechanical transducer components At low frequencies as well as at high frequencies, a sufficiently strong deflection of the membrane 18 can be achieved.
  • FIG. 4 schematically an alternative mechanical coupling of the electromagnetic transducer and the piezoelectric transducer is shown.
  • a second membrane 270 is provided within the housing 214 parallel to an end wall of the housing 214 forming a first diaphragm 218, on the underside, ie the side facing away from the first diaphragm 218 side, a piezo disc 222 is attached to the second membrane 270 to excite.
  • Mounted on top of the second diaphragm 270 is one end of a permanent magnet 230, the other end of which is attached to the first diaphragm 218 so that the permanent magnet 230 provides for mechanical coupling of the two diaphragms 218 and 270.
  • the permanent magnet 230 is slidably disposed within a coil 232, as in all other embodiments, from which it is driven upon energization of the coil 232 to a vibratory motion.
  • the magnet 230 deflects both membranes 218 and 270.
  • this causes a deflection of the second membrane 270.
  • This deflection is transmitted by means of the mechanical coupling via the magnet 230 to the first diaphragm 218, whereby this is deflected accordingly and in turn causes a deflection of the coupling element 20.
  • the wiring of the piezo disk 222 and the coil 232 can be done in the same manner as above, that is, as shown in FIG. Frequency-dependent separate control in galvanic isolation or with common ground or common control in parallel or series connection.
  • the embodiment according to FIG. 5 is different from the one of FIG. 1 only in that the permanent magnet 30 extends through a central opening 23 of the piezoelectric disk 22 and is fixedly connected to the side of the membrane 18 facing the piezoelectric disk 22 in the center of the membrane.
  • FIG. 6 shows an implanted hearing aid, generally designated 51, which is equipped with a transducer 10 of the type described above.
  • the hearing aid 51 further comprises an accumulator unit 53, a charge receiving coil 54 and an electronic module 55.
  • the components 53, 54 and 55 are housed in a hermetically sealed housing 56 which is implantable in the mastoid 57.
  • the transducer 10 and a microphone 58 via lines 59 or 60 connected.
  • the coupling element 20 is coupled to the ossicular chain 62.
  • To a portable charging unit 63 includes a charging coil 64, which can be inductively coupled to the transcutaneous charging of the accumulator 53 to the charge receiving coil 54.
  • a remote control unit is indicated at 65.
  • Such a hearing aid is for example off U.S. Patent 5,277,694 known and therefore needs no further description.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Prostheses (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Claims (14)

  1. Transducteur pour des prothèses auditives partiellement ou totalement implantables pour l'excitation mécanique directe de l'oreille moyenne ou de l'oreille interne, doté d'un boîtier (14) pouvant être fixé sur le lieu d'implantation et d'un élément de couplage (20) rigide au plan mécanique et mobile par rapport au boîtier, un élément (22, 222) piézoélectrique étant logé dans le boîtier, élément avec lequel l'élément de couplage peut être mis en vibrations, qui sont transmises après l'implantation du transducteur à un ossicule de l'oreille moyenne ou directement à l'oreille interne, caractérisé en ce qu'il est prévu dans le boîtier (14) également un agencement d'électroaimant (30, 32 ; 230, 232) qui présente un composant (32, 232) fixé par rapport au boîtier ainsi qu'un composant (30, 230) pouvant vibrer, qui est en liaison avec l'élément de couplage (20) de telle sorte que des vibrations du composant pouvant vibrer sont transmises à l'élément de couplage.
  2. Transducteur selon la revendication 1, caractérisé en ce qu'une paroi du boîtier (14) est réalisée sous forme de membrane (18) pouvant vibrer, sur le côté intérieur de laquelle l'élément (22) piézoélectrique est appliqué et au côté extérieur de laquelle l'élément de couplage (20) est relié.
  3. Transducteur selon la revendication 2, caractérisé en ce qu'un aimant permanent (30) est relié au côté, opposé à la membrane (18), de l'élément (22) piézoélectrique, lequel aimant forme le composant pouvant vibrer de l'agencement d'électroaimant, une bobine (32) électromagnétique étant placée de façon fixe dans le boîtier (14), afin de mettre l'aimant permanent en vibrations.
  4. Transducteur selon la revendication 2, caractérisé en ce qu'un aimant permanent (30) est relié au côté, tourné vers l'élément piézoélectrique (22), de la membrane (18), lequel aimant s'étend à travers une ouverture de l'élément (22) piézoélectrique et forme le composant pouvant vibrer de l'agencement d'électroaimant, une bobine (32) électromagnétique étant placée de façon fixe dans le boîtier (14), afin de mettre l'aimant permanent en vibrations.
  5. Transducteur selon l'une des revendications précédentes, caractérisé en ce que le boîtier (14) est réalisé sous forme de boîtier hermétiquement étanche et biocompatible.
  6. Transducteur selon l'une des revendications précédentes, caractérisé par une unité de commande (40, 42, 48) qui met, au choix, l'élément (22) piézoélectrique et/ou l'agencement d'électroaimant (30, 32 ; 230, 232) en vibrations.
  7. Transducteur selon la revendication 6, caractérisé en ce que l'unité de commande (40, 42, 48) est conçue de telle sorte qu'elle excite soit l'élément (22) piézoélectrique, soit l'agencement d'électroaimant (30, 32 ; 230, 232) en fonction de la fréquence de la vibration à générer sur l'élément de couplage (20).
  8. Transducteur selon la revendication 7, caractérisé en ce que l'unité de commande (40, 42, 48) est conçue de telle sorte qu'elle excite l'agencement d'électroaimant (30, 32 ; 230, 232) dans une première bande de fréquences qui va d'une première fréquence (f1) des vibrations à générer sur l'élément de couplage (20) jusqu'à une fréquence de séparation (fT), et excite l'élément (22) piézoélectrique dans une seconde bande de fréquences qui va de la fréquence de séparation (fT) jusqu'à une seconde fréquence (f2) des vibrations à générer sur l'élément de couplage.
  9. Transducteur selon la revendication 8, caractérisé en ce que la première bande de fréquences excitant l'agencement d'électroaimant (30, 32 ; 230, 232) se situe au niveau de la fréquence à un niveau inférieur à la seconde bande de fréquences utilisée pour l'excitation de l'élément (22) piézoélectrique.
  10. Transducteur selon la revendication 8 ou 9, doté également d'une unité (48) programmable pour la fixation de la fréquence de séparation (fT).
  11. Transducteur selon l'une des revendications 7 à 10, caractérisé en ce que l'agencement d'électroaimant (30, 32 ; 230, 232) et l'élément (22) piézoélectrique sont dissociés l'un de l'autre au plan galvanique.
  12. Transducteur selon l'une des revendications 1 à 5, caractérisé en ce que l'agencement d'électroaimant (30, 32 ; 230 ; 232) et l'élément piézoélectrique (22) sont connectés dans un circuit série électrique ou dans un circuit parallèle électrique.
  13. Transducteur selon l'une des revendications précédentes, caractérisé en ce que l'élément (22) piézoélectrique est conçu sous forme d'un disque mince.
  14. Prothèse auditive entièrement ou partiellement implantable avec un transducteur selon l'une des revendications précédentes.
EP98121613A 1998-09-03 1998-11-12 Dispositif transducteur pour prothèse auditive partiellement ou totalement implantée Expired - Lifetime EP0984665B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19840211A DE19840211C1 (de) 1998-09-03 1998-09-03 Wandler für teil- oder vollimplantierbare Hörgeräte
DE19840211 1998-09-03

Publications (3)

Publication Number Publication Date
EP0984665A2 EP0984665A2 (fr) 2000-03-08
EP0984665A3 EP0984665A3 (fr) 2006-05-17
EP0984665B1 true EP0984665B1 (fr) 2008-08-06

Family

ID=7879709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121613A Expired - Lifetime EP0984665B1 (fr) 1998-09-03 1998-11-12 Dispositif transducteur pour prothèse auditive partiellement ou totalement implantée

Country Status (6)

Country Link
US (1) US6123660A (fr)
EP (1) EP0984665B1 (fr)
AU (1) AU760240B2 (fr)
CA (1) CA2270127C (fr)
DE (2) DE19840211C1 (fr)
DK (1) DK0984665T3 (fr)

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EP1308068A4 (fr) 1998-06-05 2007-05-02 St Croix Medical Inc Procede et dispositif destines a attenuer l'effet de retroaction dans des systemes d'assistance auditive implantables
DE19859171C2 (de) * 1998-12-21 2000-11-09 Implex Hear Tech Ag Implantierbares Hörgerät mit Tinnitusmaskierer oder Noiser
DE19931788C1 (de) 1999-07-08 2000-11-30 Implex Hear Tech Ag Anordnung zum mechanischen Ankoppeln eines Treibers an eine Ankoppelstelle der Ossikelkette
DE19935029C2 (de) 1999-07-26 2003-02-13 Phonak Ag Staefa Implantierbare Anordnung zum mechanischen Ankoppeln eines Treiberteils an eine Ankoppelstelle
DE10015421C2 (de) 2000-03-28 2002-07-04 Implex Ag Hearing Technology I Teil- oder vollimplantierbares Hörsystem
DE10018334C1 (de) 2000-04-13 2002-02-28 Implex Hear Tech Ag Mindestens teilimplantierbares System zur Rehabilitation einer Hörstörung
DE10018361C2 (de) 2000-04-13 2002-10-10 Cochlear Ltd Mindestens teilimplantierbares Cochlea-Implantat-System zur Rehabilitation einer Hörstörung
DE10018360C2 (de) 2000-04-13 2002-10-10 Cochlear Ltd Mindestens teilimplantierbares System zur Rehabilitation einer Hörstörung
DE10031832C2 (de) * 2000-06-30 2003-04-30 Cochlear Ltd Hörgerät zur Rehabilitation einer Hörstörung
DE10039401C2 (de) 2000-08-11 2002-06-13 Implex Ag Hearing Technology I Mindestens teilweise implantierbares Hörsystem
DE10041726C1 (de) * 2000-08-25 2002-05-23 Implex Ag Hearing Technology I Implantierbares Hörsystem mit Mitteln zur Messung der Ankopplungsqualität
DE10047388C1 (de) 2000-09-25 2002-01-10 Implex Hear Tech Ag Mindestens teilweise implantierbares Hörsystem
DE10114838A1 (de) 2001-03-26 2002-10-10 Implex Ag Hearing Technology I Vollständig implantierbares Hörsystem
US6730015B2 (en) 2001-06-01 2004-05-04 Mike Schugt Flexible transducer supports
JP4597663B2 (ja) * 2002-05-31 2010-12-15 メド−エル・エレクトロメディツィニシェ・ゲラーテ・ゲーエムベーハー 低電力伝送
JP5088788B2 (ja) * 2005-01-27 2012-12-05 コクレア リミテッド 埋め込み可能医療デバイス
US20070127757A2 (en) * 2005-07-18 2007-06-07 Soundquest, Inc. Behind-The-Ear-Auditory Device
WO2007011846A2 (fr) * 2005-07-18 2007-01-25 Soundquest, Inc. Dispositif auditif integre dans l'oreille et ses procedes d'utilisation
US9179226B2 (en) * 2008-02-07 2015-11-03 Advanced Bionics Ag Partially implantable hearing device
US20090248085A1 (en) * 2008-03-31 2009-10-01 Cochlear Limited Tissue injection fixation system for a prosthetic device
CN201234336Y (zh) * 2008-07-18 2009-05-06 比亚迪股份有限公司 一种听筒单元
US20120136197A1 (en) * 2010-11-30 2012-05-31 Van Gerwen Peter B J Hearing prosthesis having a flexible elongate energy transfer mechanism
WO2012076060A2 (fr) * 2010-12-09 2012-06-14 Advanced Bionics Ag Organe de commande implantable d'une aide auditive
DE202012012867U1 (de) * 2011-12-08 2014-01-30 Biotronik Se & Co. Kg Medizinisches Implantat und medizinische Anordnung
EP2801799B1 (fr) 2013-05-08 2016-03-16 VEGA Grieshaber KG Commutateur de niveau à vibration
EP2875844B1 (fr) * 2013-11-25 2018-01-03 BIOTRONIK SE & Co. KG Dispositif d'électrodes implantables, notamment pour appareils cardiologiques, comme un stimulateur cardiaque
US10321247B2 (en) 2015-11-27 2019-06-11 Cochlear Limited External component with inductance and mechanical vibratory functionality
KR102309136B1 (ko) * 2020-03-09 2021-10-06 주식회사 티에스시 음향센서를 이용한 웨이퍼 탑재 상태 감지장치
EP4195704A3 (fr) * 2021-12-07 2023-10-04 Oticon Medical A/S Prothèse auditive comprenant un ensemble piézoélectrique et un ensemble électromagnétique

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DE4104358A1 (de) * 1991-02-13 1992-08-20 Implex Gmbh Implantierbares hoergeraet zur anregung des innenohres
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US6005955A (en) * 1996-08-07 1999-12-21 St. Croix Medical, Inc. Middle ear transducer

Also Published As

Publication number Publication date
US6123660A (en) 2000-09-26
EP0984665A3 (fr) 2006-05-17
AU760240B2 (en) 2003-05-08
AU2391499A (en) 2000-03-16
EP0984665A2 (fr) 2000-03-08
CA2270127C (fr) 2001-10-16
DE19840211C1 (de) 1999-12-30
CA2270127A1 (fr) 2000-03-03
DK0984665T3 (da) 2008-11-24
DE59814262D1 (de) 2008-09-18

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