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EP2200343A1 - Appareil de correction auditive portable dans l'oreille doté d'un microphone de guidage - Google Patents

Appareil de correction auditive portable dans l'oreille doté d'un microphone de guidage Download PDF

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Publication number
EP2200343A1
EP2200343A1 EP09177164A EP09177164A EP2200343A1 EP 2200343 A1 EP2200343 A1 EP 2200343A1 EP 09177164 A EP09177164 A EP 09177164A EP 09177164 A EP09177164 A EP 09177164A EP 2200343 A1 EP2200343 A1 EP 2200343A1
Authority
EP
European Patent Office
Prior art keywords
hearing aid
housing
sound
sound inlet
inlet opening
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.)
Withdrawn
Application number
EP09177164A
Other languages
German (de)
English (en)
Inventor
Gerhard Sporer
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.)
Sivantos GmbH
Original Assignee
Siemens Audiologische Technik GmbH
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 Siemens Audiologische Technik GmbH filed Critical Siemens Audiologische Technik GmbH
Publication of EP2200343A1 publication Critical patent/EP2200343A1/fr
Withdrawn legal-status Critical Current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
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/405—Arrangements for obtaining a desired directivity characteristic by combining a plurality of transducers
    • 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
    • H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
    • H04R25/652—Ear tips; Ear moulds
    • 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
    • H04R2225/023—Completely in the canal [CIC] hearing aids
    • 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
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/456—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback mechanically
    • 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
    • H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
    • H04R25/652—Ear tips; Ear moulds
    • H04R25/654—Ear wax retarders

Definitions

  • the invention relates to a portable in the ear of a user hearing aid with a housing, a directional microphone and a handset.
  • the size in the ear portable hearing aids are - due to the way of wearing in the ear of a user - set narrow limits. Therefore, the distance between the microphone and the handset of such a hearing aid is usually limited to a few inches. However, this leads to the risk of feedback (feedback), in particular if a high amplification of an acoustic input signal by the hearing aid is required.
  • a hearing aid worn in the ear is known, the housing of which is adapted to the individual auditory canal of the user and, when worn, fits snugly against the ear canal.
  • the housing comprises an acoustically transparent foam.
  • the object of the present invention is to reduce the tendency to feedback in hearing aids that are portable in the ear.
  • an input signal is recorded by means of an input transducer and converted into an electrical input signal.
  • an input transducer usually serves as an input transducer at least one microphone which receives an acoustic input signal and converts it into an electrical input signal.
  • Modern hearing aids often include a microphone system with multiple microphones, depending on the direction of incidence acoustic signals reception, ie a certain directional characteristics to achieve.
  • telephone coils or antennas for receiving electromagnetic input signals and conversion to electrical input signals are also common as input transducers.
  • the input signals converted by the input transducer into electrical input signals are fed to a signal processing unit for further processing and amplification. The further processing and amplification takes place to compensate for the individual hearing loss of a user usually in response to the signal frequency of the input signal.
  • the signal processing unit supplies at its output an electrical output signal, which is supplied via an output transducer to the hearing of the hearing aid wearer, so that the latter perceives the output signal as an acoustic signal.
  • output transducers usually listeners are used, which generate an acoustic output signal.
  • output transducers for generating mechanical vibrations are also known which directly excite certain parts of the ear, such as the ossicles, to vibrate.
  • output transducers are known which directly stimulate neurons of the ear.
  • a hearing aid further includes a voltage source (battery or rechargeable battery) for powering the electronic components.
  • controls on / off switch, program switch, volume control, etc. may be present.
  • Hearing aid devices are essentially divided into three types: behind-the-ear hearing aids (BTE) are worn behind the ear, with the exception of earmolds located in the ear.
  • BTE behind-the-ear hearing aids
  • IdO In-the-ear hearing aids
  • CIC hearing aids Completely in the Canal
  • the effect of a directional microphone with two sound inlets depends crucially on the position of the two Sound inlet openings from. In particular, these determine the direction of least sensitivity, the so-called Notch of the directional microphone system.
  • the sound inlet openings of the directional microphone and the sound outlet of the listener are arranged at least approximately along a straight line, so that the listener is arranged in the region of the lowest sensitivity of the directional microphone.
  • the second sound inlet opening of the directional microphone is aligned with the eardrum of the user.
  • the housing of the hearing aid device has a circumferential sound inlet opening or several sound inlet openings distributed over the circumference of the hearing aid device. These first open into a cavity within the hearing aid, wherein the second sound inlet opening of the directional microphone also opens into this cavity.
  • the directional microphone consists of two interconnected omnidirectional microphones.
  • the invention is not limited to such a constructed microphone system.
  • a gradient microphone with two sound inlets could also be used.
  • the invention has the advantage that only two omnidirectional microphones are required in order to effectively suppress the sound generated by the listener of the hearing aid and thus to prevent feedback.
  • particularly small designs in the ear of portable hearing aids, such as CIC hearing aids realize with relatively high gain.
  • the housing design of a hearing aid according to the invention is advantageously at least approximately chosen so that the shortest connection of the sound outlet opening of the hearing aid leaking sound to the sound inlet opening of the inner microphone is constant, regardless of which way the sound takes over the housing.
  • this is achieved in that both the sound inlet openings of the microphones and the sound outlet opening in the housing of the hearing aid lie on the symmetry axis of the cylindrical hearing aid.
  • this property can be achieved by a corresponding housing education in conjunction with a specific placement of the sound outlet opening in the housing.
  • Such optimization preferably takes place with the aid of a computer-aided design customary in modern shell production.
  • the entire geometry of the hearing aid according to the invention is preferably selected so that the running through the sound inlet openings of the microphones and the sound outlet opening of the hearing aid straight line at least runs approximately centrally through the ear canal.
  • An embodiment of the hearing aid according to the invention provides that a housing portion of the hearing aid, in which the sound entry openings for the second microphone are not tight against the ear canal, whereas another, with the hearing aid worn closer to the eardrum lying housing portion fits tightly against the ear canal and this seals.
  • the proportion of the sound emitted by the hearing aid which directly reaches the directional microphone, has already been considerably reduced. This special design also contributes to the reduction of feedback.
  • An alternative embodiment of the invention provides that the hearing aid according to the invention the ear canal in any Housing area seals.
  • the hearing aid in question is thus designed for an open supply.
  • the hearing aid is at least in a housing portion in which the hearing aid is not tight against the ear canal, surrounded by a foam skirt.
  • the foam jacket is made of a material, in particular of an open-porous material, which acts as a cerumen protection and prevents the penetration of dirt and cerumen into the sound inlet openings of the microphone arranged inside the hearing aid.
  • the foam material surrounding the sound inlet openings is advantageously acoustically transparent, so that sound can pass almost unhindered from the outside to the inner microphone of the hearing aid located in the ear canal.
  • FIG. 1 a schematic representation of a present in the auditory canal of a user inventive hearing aid
  • FIG. 2 a directional diagram of the directional microphone of the hearing aid.
  • FIG. 1 shows a sectional view in the region of a human ear.
  • the outer ear 1 with the adjoining auditory canal, which is completed by the eardrum 2.
  • the auditory meatus is surrounded in its outer area by relatively soft tissue and in its further area of cartilaginous tissue 4.
  • a first housing region 5A forms the first housing section of the hearing aid device 5 pointing out of the auditory canal.
  • a second, substantially cylindrical housing region 5B adjoins it whose diameter is smaller than the diameter of the auditory canal in this area is and so that is not close to the ear canal.
  • a third housing region 5C adjoins it, which rests tightly against it in the cartilaginous (bony) region of the auditory canal.
  • the housing closure forms a fourth housing area 5D facing the eardrum.
  • the hearing aid device 5 comprises the two omnidirectional microphones 6 and 7, which are electrically connected to a directional microphone 6, 7.
  • the electrical input signals are fed to a signal processing unit 12 in which the electrical input signals are processed and amplified. This finally results in an electrical output signal, which is converted by a receiver 8 into an acoustic output signal and is supplied to the user's ear via a sound outlet opening 8A in the receiver 8 and a sound channel 8C, which opens into a sound outlet opening 8B in the hearing device housing.
  • a sound inlet opening 6B between this sound inlet opening 6B in the housing and the sound inlet opening 6A of the microphone 6, a sound tube 6C is present.
  • the second microphone 7 of the directional microphone 6, 7 is located in idO hearing aids in an unusual way further inside the hearing aid 5 lying position. So that sound supplied to the ear from outside can also reach this microphone 7, a plurality of second sound inlet openings 11A, 11B, 11C, etc. are distributed over the circumference of the second housing area 5B.
  • the "inner" microphone 7 is positioned such that the distance between the sound inlet opening 7A of the microphone 7 to the second sound inlet openings 11A, 11B, 11C, etc. is approximately equal.
  • the sound inlet opening 7A and the sound inlet openings 11A, 11B, 11C, etc. open in the embodiment in a cavity of the hearing aid device 5. But it can also individual sound channels (not shown) of the individual second sound inlet openings 11A, 11B, 11C, etc. lead to the sound inlet port 7A of the microphone 7.
  • the cavity is separated in the embodiment by a partition wall 10 of the area in which the handset 8 is located.
  • FIG. 1 it can be seen, are the sound inlet opening 6B in the first housing portion 5A of the hearing aid 5, the sound inlet opening 6A of the microphone 6, the sound inlet opening 7A of the microphone 7 and the sound outlet opening 8B of the hearing aid 5 approximately on a straight line G, which in turn at least approximately in the middle of the ear canal runs.
  • the directional characteristic set in the directional microphone 6, 7 is in FIG. 2 illustrated.
  • Such a directional characteristic can be achieved, for example, by delaying the microphone signal generated by the microphone 7 during the electronic interconnection of the two microphones 6 and 7 and subtracting it from the microphone signal of the microphone 6.
  • FIG. 2 It can be seen that the direction of the highest sensitivity of the directional microphone 6, 7 out of the ear canal and the direction of the least sensitivity (Notch) points in the direction of the sound outlet opening 8B. This achieves optimum reception of the sound entering the auditory canal from the outside in conjunction with the greatest possible suppression of the sound generated by the earpiece 8 by the directional microphone 6, 7.
  • the housing geometry of the hearing aid device 5 is advantageously designed such that the shortest path of the sound generated by the earphone 8 from the sound outlet opening 8B via the third housing portion 5C and the second sound inlet openings 11A, 11B, 11C, etc. to the sound inlet opening 7A of the microphone. 7 at least substantially always the same length, regardless of where the sound propagates through the third housing portion 5C.
  • These conditions can already be used in the computer-aided design of the housing shell of the hearing aid adapted to the individual auditory canal of the user 5 can be achieved.
  • this arrangement has the advantage that with the built-up of only two omnidirectional microphones 6 and 7 directional microphone already a substantial suppression of the sound generated by the handset 8 can be achieved. Feedbacks are thus largely prevented, even with a high gain of an incoming into the hearing aid 5 sound signal.
  • the second housing region 5B is surrounded by an acoustically transparent foam 9.
  • the foam 9 also covers the second sound entry openings 11A, 11B, 11C, etc., thus preventing the entry of cerumen into the hearing aid 5.
  • the foam surrounding the second housing portion 5B foam 9 is releasably connected to the hearing aid 5, so that it can be optionally replaced in a simple manner.
  • the hearing aid device 5 is designed such that the third housing region 5C bears tightly against the cartilaginous or bony region 4 of the ear canal.
  • the sound generated by the handset 8 and reaching the microphones 6 and 7 is already significantly attenuated. This also contributes to increasing the maximum achievable with the hearing aid 5 gain.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Headphones And Earphones (AREA)
EP09177164A 2008-12-16 2009-11-26 Appareil de correction auditive portable dans l'oreille doté d'un microphone de guidage Withdrawn EP2200343A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008062586 2008-12-16

Publications (1)

Publication Number Publication Date
EP2200343A1 true EP2200343A1 (fr) 2010-06-23

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EP09177164A Withdrawn EP2200343A1 (fr) 2008-12-16 2009-11-26 Appareil de correction auditive portable dans l'oreille doté d'un microphone de guidage

Country Status (2)

Country Link
US (1) US20100150385A1 (fr)
EP (1) EP2200343A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2843971A1 (fr) * 2013-09-02 2015-03-04 Oticon A/s Prothèse auditive avec microphone intra-auriculaire

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8693719B2 (en) 2010-10-08 2014-04-08 Starkey Laboratories, Inc. Adjustment and cleaning tool for a hearing assistance device
US8442253B2 (en) 2011-01-26 2013-05-14 Brainstorm Audio, Llc Hearing aid
JP3179321U (ja) * 2012-08-13 2012-10-25 株式会社レーベン販売 擦れ音防止補聴器
EP3214857A1 (fr) 2013-09-17 2017-09-06 Oticon A/s Dispositif d'aide auditive comprenant un système de transducteur d'entrée
US10306352B2 (en) * 2013-09-27 2019-05-28 3M Innovative Properties Company Microphone having closed cell foam body
KR101877021B1 (ko) * 2016-08-22 2018-07-11 삼미음향기술(주) 디지털 보청기
EP3315985B1 (fr) * 2016-10-26 2020-12-23 Siemens Healthcare GmbH Unité audio rm
US10805739B2 (en) * 2018-01-23 2020-10-13 Bose Corporation Non-occluding feedback-resistant hearing device
EP3787316A1 (fr) * 2018-02-09 2021-03-03 Oticon A/s Dispositif auditif comprenant une unité de filtrage formant des faisceaux afin de réduire le feedback
JP2024512867A (ja) * 2022-03-04 2024-03-21 シェンツェン・ショックス・カンパニー・リミテッド 聴覚補助装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4528426A (en) 1983-11-23 1985-07-09 Northern Telecom Limited Directional microphone assembly
DE3840393A1 (de) 1987-12-01 1989-06-15 Viennatone Gmbh Im ohr zu tragendes elektroakustisches geraet
US5033090A (en) 1988-03-18 1991-07-16 Oticon A/S Hearing aid, especially of the in-the-ear type
US5201006A (en) * 1989-08-22 1993-04-06 Oticon A/S Hearing aid with feedback compensation
US5757933A (en) 1996-12-11 1998-05-26 Micro Ear Technology, Inc. In-the-ear hearing aid with directional microphone system
DE19810043A1 (de) 1998-03-09 1999-09-23 Siemens Audiologische Technik Hörgerät mit einem Richtmikrofon-System
DE29904157U1 (de) 1999-03-08 2000-04-13 Rupprecht, Richard, 91207 Lauf Telefonhörerabdeckung
WO2005076991A2 (fr) 2004-02-05 2005-08-25 Insound Medical, Inc. Appareil auditif de port prolonge comportant une cavite commune microphone-accumulateur
EP1919255A2 (fr) * 2003-05-19 2008-05-07 Widex A/S Appareil d'aide auditive

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4528426A (en) 1983-11-23 1985-07-09 Northern Telecom Limited Directional microphone assembly
DE3840393A1 (de) 1987-12-01 1989-06-15 Viennatone Gmbh Im ohr zu tragendes elektroakustisches geraet
US5033090A (en) 1988-03-18 1991-07-16 Oticon A/S Hearing aid, especially of the in-the-ear type
US5201006A (en) * 1989-08-22 1993-04-06 Oticon A/S Hearing aid with feedback compensation
US5757933A (en) 1996-12-11 1998-05-26 Micro Ear Technology, Inc. In-the-ear hearing aid with directional microphone system
DE19810043A1 (de) 1998-03-09 1999-09-23 Siemens Audiologische Technik Hörgerät mit einem Richtmikrofon-System
DE29904157U1 (de) 1999-03-08 2000-04-13 Rupprecht, Richard, 91207 Lauf Telefonhörerabdeckung
EP1919255A2 (fr) * 2003-05-19 2008-05-07 Widex A/S Appareil d'aide auditive
WO2005076991A2 (fr) 2004-02-05 2005-08-25 Insound Medical, Inc. Appareil auditif de port prolonge comportant une cavite commune microphone-accumulateur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2843971A1 (fr) * 2013-09-02 2015-03-04 Oticon A/s Prothèse auditive avec microphone intra-auriculaire
US9351086B2 (en) 2013-09-02 2016-05-24 Oticon A/S Hearing aid device with in-the-ear-canal microphone

Also Published As

Publication number Publication date
US20100150385A1 (en) 2010-06-17

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