EP1422971A1 - Transducteur implantable pour des systèmes auditifs et procédé d'ajustement de la réponse en fréquence d'un tel transducteur - Google Patents

Transducteur implantable pour des systèmes auditifs et procédé d'ajustement de la réponse en fréquence d'un tel transducteur Download PDF

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Publication number
EP1422971A1
EP1422971A1 EP02025939A EP02025939A EP1422971A1 EP 1422971 A1 EP1422971 A1 EP 1422971A1 EP 02025939 A EP02025939 A EP 02025939A EP 02025939 A EP02025939 A EP 02025939A EP 1422971 A1 EP1422971 A1 EP 1422971A1
Authority
EP
European Patent Office
Prior art keywords
transducer
converter
membrane
implantable
permanent magnet
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.)
Granted
Application number
EP02025939A
Other languages
German (de)
English (en)
Other versions
EP1422971B1 (fr
Inventor
Christoph Schmid
Hans Bernhard
Zbynek Struzka
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.)
Sonova Holding AG
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
Priority to EP02025939A priority Critical patent/EP1422971B1/fr
Priority to US10/420,748 priority patent/US6855104B2/en
Priority to CA002427051A priority patent/CA2427051C/fr
Priority to AU2003204136A priority patent/AU2003204136B2/en
Publication of EP1422971A1 publication Critical patent/EP1422971A1/fr
Application granted granted Critical
Publication of EP1422971B1 publication Critical patent/EP1422971B1/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
    • 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
    • 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

Definitions

  • the invention relates to a working on the electromagnetic transducer principle implantable transducer for hearing systems and a method for tuning the Frequency response of such a converter.
  • Transducers of the type considered here are basically, for example, from ENT, 1997-45: 792-800, H. Leysieffer et al. "An implantable piezoelectric hearing aid transducer for inner ear deaf people ". This essay deals accordingly his title especially with piezoelectric transducers; it is there, however generally noted that actuator hearing aid converters are also under use of the electromagnetic conversion process that can be realized at an electromagnetic transducer a permanent magnet in a time-varying Field of a fixed coil moves and that this has the advantage of miniaturization of the portable permanent magnet.
  • a hearing aid for an at least partially implantable hearing aid certain electromagnetic transducers for direct mechanical excitation of the Middle or inner ear is described in US 6,162,169. It dips on the inside a membrane suspended permanent magnet in a housing-fixed electromagnetic Component, in particular a ring coil. The membrane is oscillatable and it closes the open face of a hermetically sealed cup-shaped Converter housing. On the outside of the membrane is a coupling element for Transmitted vibrations attached to the middle and / or inner ear.
  • the invention is based, an object according to the electromagnetic transducer principle working implantable transducer for hearing aids to create occurring in practice, among other things from the type of converter use as Actuator or sensor, depending on the intended implantation location and the like Conditions can be adapted particularly well. It is also intended to be a procedure be provided for tuning the frequency response of such a converter.
  • an implantable working according to the electromagnetic transducer principle Transducer for hearing systems with a static part, to which a hermetic on all sides tight converter housing and a ring coil arrangement fixedly attached therein, and with a dynamic part that at least with the static converter part a connecting element is in mechanical connection, in the implanted state to a body part of an implant carrier via at least one connecting element is coupled and a permanent magnet arrangement which interacts with the toroidal coil arrangement has, which by means of a bearing in the direction of the axis of Ring coil assembly is mounted to vibrate, with at least one connecting element is designed as a multi-functional element, which is also part of the storage and / or part of the hermetically sealed transducer housing, and wherein the mechanical Properties of the multi-function element to achieve a target frequency response of the converter are selected.
  • the invention also relates to a method for tuning the frequency response one that works according to the electromagnetic transducer principle, implantable Transducers for hearing aids, with a static part, to which an all-round hermetic tight converter housing and a ring coil arrangement fixedly attached therein, and is provided with a dynamic part that overlaps with the static converter part at least one connecting element is in mechanical connection in the implanted Condition on a body part of an implant carrier via at least one connecting element is coupled and a cooperating with the toroidal arrangement Has permanent magnet arrangement which by means of a bearing in the direction of Axis of the toroidal coil arrangement is mounted so that it can vibrate, the mechanical Properties of at least one connecting element that functions as a multi-function element at the same time part of the storage and / or part of the hermetically sealed converter housing is selected to achieve a target frequency response of the transducer.
  • the invention assumes that it is for implantable electromechanical actuators it is essential to ensure high efficiency. Especially in the case of Implants are namely problematic in terms of energy supply, so it is on it arrives, a certain amount of energy in the highest possible amount of mechanical Implement energy.
  • the invention is based on the knowledge that the efficiency, with which an actuator transfers energy to the body in a significant way from the adaptation of the frequency response of the actuator to the load impedance and therefore depends the matching of the frequency response characteristics with respect to the impedance of the the actuator effective load has a significant impact on the efficiency of the Can have energy transfer from the transducer to the body.
  • electromechanical It is essential for sensors to be as sensitive as possible and achieve linearity.
  • the frequency response of the converter is also decisive for this.
  • At least one multiple function element is one of setting the Target frequency response of the transducer bendable membrane, which serves as a connecting element for a mutual elastic connection of static and dynamic Transformer part provides and which also forms a wall part of the converter housing.
  • the converter housing can in particular be a rigid tubular peripheral wall and with these have tightly connected end walls, at least one of the end walls from a bendable serving to set the target frequency response of the transducer Membrane is formed over which the static and dynamic part of the transducer are elastically connected to each other and at the same time part of the storage of the permanent magnet arrangement is.
  • the membrane takes over four at the same time Functions:
  • At least one of the connecting elements can also be used as a damping element Damping the vibratory movements of the permanent magnet arrangement can be designed, the mechanical properties of the damping element also with regard are selected to achieve the target frequency response.
  • At least one membrane can be provided as the damping element, which at the same time May be part of the bearing arrangement of the permanent magnet arrangement.
  • the the Frequency response of the transducer influencing damping properties of such Membrane can not only be selected by choosing the membrane wall thickness, but also other also by choosing an appropriate perforation or slitting the Adjust the membrane.
  • At least one plug made of viscous material may also be provided, that compared to both the static converter part and the dynamic one Converter part can be supported.
  • the permanent magnet arrangement mounted on a pole, which by means of storage at least two axially spaced locations with respect to the converter housing is axially adjustable, this rod being an actuator element from the Converter housing can protrude.
  • the permanent magnet arrangement is preferably in its own, hermetically sealed and biocompatible housing.
  • the converter housing is expediently cylindrical, in particular circular cylindrical, designed.
  • a converter which can be used either as a vibration-stimulating actuator or as a vibration-sensing sensor, is shown in a block framed by broken lines.
  • M 1 denotes the static part of the converter.
  • the static transducer part M 1 represents an element which, in the implanted state, is in substantially rigid contact with a body part B 1 of the implant carrier, for example a muscle or bone, which has a large mass compared to the mass of the transducer.
  • M 2 represents the dynamic part of the transducer in FIGS. 1 and 2. It is in contact with a body part B 2 of the implant carrier, the mass or impedance of which is preferably comparable to the mass or impedance of the transducer.
  • the body part B 2 can be, in particular in the case of an actuator, the eardrum, a middle ear cross-section, the perilymph or the basilar membrane in the inner ear.
  • the static converter part M 1 and the dynamic converter part M 2 are mechanically connected to one another via a connecting element E 1 , which is indicated as a spring.
  • Another connecting element E 2 illustrated as an attenuator, provides the mechanical connection between the dynamic converter part M 2 and the body part B 2 .
  • the static converter part M 1 and the dynamic converter part M 2 are connected to one another via two connecting elements E 1 and E 2 , of which the connecting element E 1 is again designed as a spring and the connecting element E 2 as an attenuator ,
  • a connecting element E 3 designed as a spring is provided for coupling the dynamic converter part M 2 to the body part B 2 .
  • connecting elements can be used.
  • at least one of these connecting elements is designed as a multi-functional element, which is also part of the storage of dynamic converter part and / or part of a hermetically sealed converter housing.
  • the transducer designated overall by 10
  • the transducer has a hermetic seal gas and liquid-tight housing 11 of, for example, circular cylindrical Mold made of biocompatible, gas and liquid-tight material, for example titanium, Gold or platinum.
  • the converter housing 10 includes a rigid, tubular one Circumferential wall 12 and two substantially circular end walls, of which in Fig. 3rd only one can be seen. The latter is formed by a flexible membrane 13, whose outer edge with the peripheral wall 12 in a tight and hermetically sealed connection stands.
  • a rod 14 extends with the membrane 13 is firmly and hermetically sealed and from the converter housing 11 protrudes as an actuator element.
  • the longitudinal axis of the rod 14 coincides with the Longitudinal central axis of the housing 11 and with the center of the membrane 13 together.
  • On the rod 14 is a permanent magnet arrangement having two permanent magnets 15 attached.
  • the two permanent magnets are magnetized in the axial direction, which is indicated in Fig. 3 with a double arrow and which is also the direction of vibration of the dynamic part of the converter.
  • the permanent magnet arrangement 15 as such can preferably be packed hermetically sealed and biocompatible his.
  • the permanent magnet arrangement 15 can be in its own housing made of titanium, gold or platinum, of which the concentric outer and Inner walls 32 and 33 are shown. This will make the body of the Implant carrier protected against toxic permanent magnet materials even if which should break part of the transducer housing membrane 13. The inherent The safety of the converter design shown is further improved in this way.
  • an overall fixed with respect to the peripheral wall 12 with 16 designated coil arrangement to that in the illustrated embodiment include three axially successive cylindrical ring coils.
  • the permanent magnet arrangement 15 is located within that of the coil arrangement 16 Space.
  • the coil arrangement 16 generates this for driving the permanent magnet arrangement 15 required alternating electromagnetic field.
  • Connections 17 for the Coil assembly 16 are hermetic from the converter housing 11 via not shown sealed bushings led out. An AC signal is applied to the connections 17 applied, the permanent magnet assembly 15 together with the Coupling rod 14 causes axial vibrations.
  • the coil arrangement and the permanent magnet arrangement interacting with it can in principle also be constructed in a manner other than that shown in FIG. 3 be, for example, in US Pat. No. 5,299,176 for non-implantable transducers known way or similar.
  • the rod 14 and the permanent magnet assembly 15 are related to the coil assembly 16 axially limited adjustable by means of a bearing.
  • To storage include the membrane 13 and another in the illustrated embodiment bendable, essentially circular membrane 18.
  • the membrane 18 sits on the side of the coil arrangement 16 facing away from the membrane 13 Membrane 18 is also fixed with respect to the peripheral wall 12, and the Rod 14 is in a central opening 19 of the top view illustrated in FIG. 4 Membrane 18 attached.
  • the membrane 18 does not Part of the hermetically sealed converter housing 11, but it is axially spaced from the front wall of the housing 11, which cannot be seen in FIG. 3.
  • the membrane 18 is provided with a series of concentric openings.
  • the resulting Circular ring sections 20 of the membrane 18 are connected to one another via webs 21.
  • the membrane 18 can be made of the same material as the membrane 13, for example made of titanium, gold or platinum. Such a perforated membrane can Bearing function take over without the frequency response of the converter appreciable influence.
  • the coil arrangement 16 and the converter housing - form the static part M 1 of the converter shown in FIGS. 1 and 2.
  • this static transducer part is essentially rigidly coupled to the cranial bone of the implant carrier.
  • the rod 14 and the permanent magnet arrangement 15 carried by it represent the dynamic transducer part M 2 of FIGS. 1 and 2.
  • the membrane 13 corresponds to the connecting element E 1 of FIGS. 1 and 2; however, it also has a housing function and a bearing function at the same time, and it serves to adjust the frequency response of the converter 10.
  • a corresponding attenuator could be integrated in the coupling rod 14 in order to implement the damping connecting element E 2 in FIG. 1.
  • the connecting element E 2 having spring properties in FIG. 2 can be connected by a coupling rod 14 that is resilient in the axial direction and / or by
  • the resonance peak of the frequency response curves according to FIG. 5 shifts at one Significant change in the thickness of the membrane 13 from 20 ⁇ m to 25 ⁇ m from about 800 Hz to about 1000 Hz.
  • the thickness of the bearing membrane 18, however, has the Frequency response practically no influence.
  • a membrane 25 shown schematically in FIG. 6 can also be provided, which in addition to a bearing function also has a damping function which influences the frequency response of the transducer in the desired manner.
  • an uninterrupted layer 26 made of viscous material, for example silicone, can be selected as the membrane material.
  • a viscous membrane can be covered with a layer 27 of solid and preferably biocompatible elastic material, for example a thermoset or metal, in particular titanium, gold, platinum or a mixture of at least two of these metals.
  • This elastic coating layer 27 is perforated, and preferably analogously to the perforation of the membrane 18 shown in FIG. 4.
  • Such a membrane 25 corresponds functionally to the connecting element E 2 of FIG. 2.
  • FIG. 7 shows the measured effect of a silicone membrane according to FIG. 6 on the transfer function an acoustic transducer.
  • the thick solid curve represents the Transfer function without silicone membrane, while the thin curve shows the Transfer function of the converter with silicone membrane 25 is.
  • the membrane 25 In the range below about 3000 Hz and above about 8000 Hz, the membrane 25 has a damping effect. In the range of around 4000 up to 8000 Hz, however, the transducer deflection is increased by the membrane 25.
  • FIG. 8 an attenuator in the form of a circular cylindrical plug 30 made of viscous material, for example silicone, is shown.
  • the plug sits on the side of the diaphragm 18 facing away from the coil arrangement 16 according to FIG. 3 on the coupling rod 14.
  • the plug 30 can be supported directly or indirectly on a rigid part of the converter housing 11 and can influence the movement of the dynamic converter part M 2 in the axial direction .
  • a similar plug made of viscous material can, however, also abut against the axial end of the coupling rod 14 on the side of the membrane 18 facing away from the coil arrangement 16 for damping purposes.
  • the isolated influence of such a plug is that large deflections of the dynamic transducer part M 2 are damped more than small deflections. This effect corresponds to a relatively strong damping at low frequencies and a relatively weak damping at high frequencies. Such an influence on the frequency response can be useful for an actuator to improve the hearing if, for example, signals below 250 Hz that are not required for speech understanding are to be masked out.
  • Attenuator 30 itself does not need to have a bearing effect.
  • a further modified Embodiment can also be a viscous plug of the type described be designed so that it is essentially only in the axial, but not in the radial direction gives way. Then the grafting itself can be used as a storage and management function for the dynamic Take over converter part, and the membrane 18 may be omitted if necessary.
  • Attenuators for example in the form of Membranes and / or plugs of the type described can, depending on the use of the transducer also be useful as a sensor or as a transducer in the ultrasound spectrum.
  • Attenuators allow the spectrum to be targeted in several To influence frequency ranges. For example, in the converter according to FIG.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Neurosurgery (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Prostheses (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
EP02025939A 2002-11-20 2002-11-20 Transducteur implantable pour des systèmes auditifs et procédé d'ajustement de la réponse en fréquence d'un tel transducteur Expired - Lifetime EP1422971B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP02025939A EP1422971B1 (fr) 2002-11-20 2002-11-20 Transducteur implantable pour des systèmes auditifs et procédé d'ajustement de la réponse en fréquence d'un tel transducteur
US10/420,748 US6855104B2 (en) 2002-11-20 2003-04-23 Implantable transducer for hearing aids and process for tuning the frequency response of one such transducer
CA002427051A CA2427051C (fr) 2002-11-20 2003-04-29 Transducteur implantable pour aides auditives et processus pour accorder la reponse en frequence d'un tel transducteur
AU2003204136A AU2003204136B2 (en) 2002-11-20 2003-05-07 Implantable Transducer for Hearing Aids and Process for Tuning the Frequency Response of One Such Transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02025939A EP1422971B1 (fr) 2002-11-20 2002-11-20 Transducteur implantable pour des systèmes auditifs et procédé d'ajustement de la réponse en fréquence d'un tel transducteur

Publications (2)

Publication Number Publication Date
EP1422971A1 true EP1422971A1 (fr) 2004-05-26
EP1422971B1 EP1422971B1 (fr) 2012-11-07

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EP02025939A Expired - Lifetime EP1422971B1 (fr) 2002-11-20 2002-11-20 Transducteur implantable pour des systèmes auditifs et procédé d'ajustement de la réponse en fréquence d'un tel transducteur

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US (1) US6855104B2 (fr)
EP (1) EP1422971B1 (fr)
AU (1) AU2003204136B2 (fr)
CA (1) CA2427051C (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050039446A (ko) * 2003-10-25 2005-04-29 대한민국(경북대학교 총장) 중이 이식형 보청기용 트랜스듀서의 진동소자 제작방법 및그에 의해 제작된 진동소자
US7651460B2 (en) * 2004-03-22 2010-01-26 The Board Of Regents Of The University Of Oklahoma Totally implantable hearing system
US8942409B2 (en) 2004-06-03 2015-01-27 Tymphany Hk Limited Magnetic suspension transducer
WO2006058368A1 (fr) * 2004-11-30 2006-06-08 Cochlear Acoustics Ltd Actionneur implantable pour des applications d'aide auditive
WO2007011806A2 (fr) * 2005-07-18 2007-01-25 Soundquest, Inc. Dispositif auditif place derriere l'oreille
US20070127757A2 (en) * 2005-07-18 2007-06-07 Soundquest, Inc. Behind-The-Ear-Auditory Device
WO2009152528A1 (fr) * 2008-06-13 2009-12-17 Cochlear Americas Capteur de son implantable pour prothèses auditives
SE0900372A1 (sv) * 2009-03-24 2010-06-15 Osseofon Ab Benledningsvibratorkonstruktion med förbättrad högfrekvensrespons
JP2013539351A (ja) 2010-10-08 2013-10-17 ソリダゴ ソシエテ ア レスポンサビリテ リミテ 補聴応用のための埋め込み可能なアクチュエータ
US9131323B2 (en) * 2010-11-03 2015-09-08 Cochlear Limited Hearing prosthesis having an implantable actuator system
US9729981B2 (en) 2011-05-12 2017-08-08 Cochlear Limited Identifying hearing prosthesis actuator resonance peak(s)
KR101223693B1 (ko) * 2011-06-16 2013-01-21 경북대학교 산학협력단 구동력이 우수한 3코일 타입의 정원창 구동 진동체
US9554222B2 (en) 2011-12-07 2017-01-24 Cochlear Limited Electromechanical transducer with mechanical advantage
US9900709B2 (en) 2013-03-15 2018-02-20 Cochlear Limited Determining impedance-related phenomena in vibrating actuator and identifying device system characteristics based thereon
US10477332B2 (en) 2016-07-18 2019-11-12 Cochlear Limited Integrity management of an implantable device
US11432084B2 (en) 2016-10-28 2022-08-30 Cochlear Limited Passive integrity management of an implantable device
US10897677B2 (en) 2017-03-24 2021-01-19 Cochlear Limited Shock and impact management of an implantable device during non use
US11223912B2 (en) 2017-07-21 2022-01-11 Cochlear Limited Impact and resonance management
CN109451414A (zh) * 2018-10-30 2019-03-08 佛山市合宏泰业科技有限公司 一种喇叭振动检测装置

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US4628907A (en) * 1984-03-22 1986-12-16 Epley John M Direct contact hearing aid apparatus
US5299176A (en) * 1991-12-20 1994-03-29 Tibbetts Industries, Inc. Balanced armature transducers with transverse gap
US6139488A (en) * 1997-09-25 2000-10-31 Symphonix Devices, Inc. Biasing device for implantable hearing devices
US6162169A (en) * 1998-09-03 2000-12-19 Implex Aktiengesellschaft Hearing Technology Transducer arrangement for partially or fully implantable hearing aids
US20010055405A1 (en) * 1998-12-30 2001-12-27 Cho Jin-Ho Middle ear hearing aid transducer

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US5554096A (en) * 1993-07-01 1996-09-10 Symphonix Implantable electromagnetic hearing transducer
US5624376A (en) * 1993-07-01 1997-04-29 Symphonix Devices, Inc. Implantable and external hearing systems having a floating mass transducer
DE19610997B4 (de) * 1996-03-21 2006-07-13 Sennheiser Electronic Gmbh & Co. Kg Elektrodynamischer Schallwandler mit Magnetspaltenabdichtung und Hörhilfe
DE19738587C1 (de) * 1997-09-03 1999-05-27 Implex Gmbh Anordnung zum Einstellen und Fixieren der Relativlage zweier Elemente eines aktiven oder passiven Hör-Implantats
US6217508B1 (en) * 1998-08-14 2001-04-17 Symphonix Devices, Inc. Ultrasonic hearing system
DE19948336C2 (de) * 1999-10-07 2002-02-28 Implex Hear Tech Ag Anordnung zum Ankoppeln eines Treibers an eine Ankoppelstelle der Ossikelkette

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US4628907A (en) * 1984-03-22 1986-12-16 Epley John M Direct contact hearing aid apparatus
US5299176A (en) * 1991-12-20 1994-03-29 Tibbetts Industries, Inc. Balanced armature transducers with transverse gap
US6139488A (en) * 1997-09-25 2000-10-31 Symphonix Devices, Inc. Biasing device for implantable hearing devices
US6162169A (en) * 1998-09-03 2000-12-19 Implex Aktiengesellschaft Hearing Technology Transducer arrangement for partially or fully implantable hearing aids
US20010055405A1 (en) * 1998-12-30 2001-12-27 Cho Jin-Ho Middle ear hearing aid transducer

Also Published As

Publication number Publication date
EP1422971B1 (fr) 2012-11-07
AU2003204136B2 (en) 2008-11-20
AU2003204136A1 (en) 2004-06-10
US6855104B2 (en) 2005-02-15
US20040097785A1 (en) 2004-05-20
CA2427051C (fr) 2006-10-03
CA2427051A1 (fr) 2004-05-20

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