US3875349A - Hearing aid - Google Patents

Hearing aid Download PDF

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Publication number
US3875349A
US3875349A US326550A US32655073A US3875349A US 3875349 A US3875349 A US 3875349A US 326550 A US326550 A US 326550A US 32655073 A US32655073 A US 32655073A US 3875349 A US3875349 A US 3875349A
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Prior art keywords
hearing aid
microphone
amplifier
microphones
sound inlet
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Expired - Lifetime
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US326550A
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English (en)
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Heinz Ruegg
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BOMMER AG
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BOMMER AG
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    • 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
    • H04R25/402—Arrangements for obtaining a desired directivity characteristic using contructional means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • 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

Definitions

  • the present invention relates to a new and improved construction of hearing 'aid for the hard of hearing of the type incorporating a microphone system coupled with an amplifier.
  • hearing aid or hearing device, or equivalent terminology should be understood as encompassing both the so-called behind-the-ear as well as also the so-called in-the-ear hearing aid and hearing aid eyeglasses, in other words all hearing aids worn at or about the head of the user.
  • a further object of the present invention relates to an improved construction of hearing aid which combines the advantages of a hearing aid equipped with a microphone having directional characteristics with a hearing aid equipped with a microphone having spherical sensitivity characteristics while avoiding the drawbacks present when only using a microphone in a hearing aid having one or the other of such sensitivity characteristics.
  • the proposed hearing aid is manifested by'the features that the microphone system possesses a first microphone having spherical sensitivity characteristics and a second microphone with directional sensitivity characteristics, and wherein the amplifier can be selectively switched to either one of both microphones.
  • a minature hand-operated reversing switch can be provided between the microphones and the amplifier, and which switch can be actuated, when required, by the user without having to remove the hearing aid.
  • both of the microphones can be arranged through the agency of a controlled reversing switch following a threshold value amplifier, which upon exceeding a predetermied signal peak controls the reversing switch for switching to the second microphone, that is to say, to that microphone which has a pronounced directional characteristic.
  • This predetermined signal peak can be set to a value which occurs when the wearer is carrying out a conversation with another person at a normal distance.
  • Both of the microphones are preferably each arranged in a respective compartment of a housing subdivided by a partition wall into two compartments or chambers, wherein in the first compartment there opens a sound inlet opening and in the second compartment two oppositely situated sound inlet openings.
  • the diaphragms or membranes of the microphones and which are capable of vibrating or oscillating such that they are each essentially parallel to the partition wall.
  • the directional characteristics of the second microphone can be increased if the one sound inlet opening associated with such microphone possesses a greater sound absorption capacity than the other sound inlet opening.
  • FIG. 3 schematically illustrates the sensitivity charac:
  • FIG. 4 schematically illustrates the sensitivity characteristics of a second microphone
  • FIG. 5 is a circuit diagram of a hearing aid equipped with manually-switchable microphones, wherein the arrangement of both microphones is illustrated in a common housing.
  • the hearing aid 10 depicted by way of example in FIG. 1, possesses two microphones l 1 and 12, wherein the first microphone, the microphone 11, as will be understood by referring to FIG. 3, is assumed to possess a spherical-type of sensitivity characteristic, whereas the second microphone, the microphone 12, as indicated in FIG. 4, is assumed to possess a sensitivity having a pronounced directional characteristic.
  • the microphone 11 is electrically coupledvia a conductor or line 13 with one fixed contact 15 and the microphone 12 via a conductor or line 14 with the other fixed contact 16 of a reversing switch or switch means 22.
  • the movable contact 17 of the reversing switch 22 is connected through the agency of a conductor 18 with an amplifier 19.
  • the output of amplifier 19 is connected via a conductor 20 with an electro-mechanical transducer, for instance a loud-speaker 21 where the electrical signals emanating from the microphone 11 or the microphone 12 are amplified by amplifier 19, and again transformed into mechanical oscillations, that is to say, sound waves.
  • the amplifier 19 is a so-called threshold value amplifier which, apart from the output or output conductor 20 which leads to the loudspeaker 21, possesses a second output 24 where there then appears a signal when the signal prevailing from one of both microphones 11 and 12 exceeds a predetermined signal peak.
  • the output 24 is connected through the agency of a further switching element, designated by reference character 25, with the control input 26 of the reversing switch or switch means 23.
  • the switch element can be a control or regulator, but also can be a frequencydependent discriminator stage, so that switching-over to the microphone 12 possessing the pronounced directional characteristic, not only then occurs when a sound has assumed a predetermined intensity, rather when such sound also possesses a predetermined frequency spectrum. Switching back to the microphone ll possessing the spherical sensitivity characteristic can occur both automatically upon the absence of a signal at theamplifier output 24, or also however manually, so that the user has the possibility of intentionally controlling the hearing aid.
  • the microphones can be electro-magnetic, piezo-electrical or dielectrical microphones wherein, however, both microphones always will be of the same type owing to the nature of the different frequency characteristics.
  • the amplifiers of both embodiments can be linear, AGC (automatic gain control) or non-linear controlled amplifiers.
  • FIG. 5 there is illustrated a detailed circuit diagram of hearing aid with the two schematically arranged microphones of such hearing aid collectively accommodated in a single housing.
  • Both of the microphones 11 and 12 are arranged in a common housing 27, the internal compartment of which is subdiv-ided into two compartments or chambers 29 and 30 by a partition wall 28.
  • the compartment 29 there is arranged the microphone 11 with its diaphragm or membrane 38 and its transducer component 39
  • the microphone 12 with its diaphragm or membrane 40 and its transducer component 41.
  • the compartment 29 possesses a' sound inlet opening 31 which, as best seen by referring to FIG.
  • the compartment 30 possesses two oppositely situated sound inlet openings 32 and 35, wherein the sound inlet opening 32 opens into the compartment 30 at the side of the diaphragm which faces away from the transducer component 41 and the sound inlet opening 35 opens at the side of the diaphragm 40 which confronts the transducer component 41.
  • a common sound inlet funnel 33 is arranged forwardly of both sound inlet openings 31 and 32.
  • the sound inlet funnel 33 possesses a single inlet opening 34.
  • the partition wall 28 will therefore so to speak be impinged in a push-pull mode from both sides by the sound oscillations or vibrations, so that as a practical matter it does not begin to vibrate or oscillate, whereby there is practically eliminated the possibility of acoustical feedback between the compartments 29 and 30. Since the microphone 11 only has associated therewith one sound inlet opening, namely the opening 31, the diaphragm 38 will be activated by its receiving sensitivity is concerned, possesses a spherical-type characteristic as same has been schematically depicted in FIG. 3. The conditions are different for the microphone 12.
  • both sides of the diaphragm or membrane 40 are impinged by the sound pressure, wherein, however, the sound waves which enter the opening 35 are dampened to a greater extent than the sound waves which enter through the opening 32. Consequently, the diaphragm 40 is placed into oscillation which, however, is only predicated upon the magnitude of the pressure differential in the compartment 30 which prevails between both faces or sides of the diaphragm 40. Since additionally the sound inlet openings 32 and 35 are arranged opposite one another the microphone 12 possesses, as concerns its receiving sensitivity, a pronounced directional characteristic,
  • Both of the microphones 11 and 12 are each coupled through the agency of the conductor lines 13 and 14 respectively, with the reversing switch 22 and the amplifier 19.
  • conductor lines 13 and 14 there is shown in phantom lines a supply conductor for the situation where the microphones 11 and 12 are of the type belonging to the class of piezo-electrical or dielectrical microphones.
  • the illustrated amplifier 19 is a conventional miniaturized hearing aid-amplifier. The power supply to such amplifier 19 takes place through the agency of a suitable and therefore not particularly illustrated current source coupled with the terminals 45 and 46, wherein an installed switch 44 serves to switchon the amplifier 19.
  • Amplifier 19 is composed of the resistors Rl-R6, the capacitors C1-C7, the transistors Tl-T3 as well as the potentiometer Rv serving as the loud-speaker control and the variable resistor Rtl.
  • a non-linear network is arranged in circuit with the conductor 47 leading to the loud-speaker 21, and this non-linear network consists of the resistor R7, both of the diodes D1 and D2 which are arranged in an antiparallel circuit configuration and the variable resistor Rt2.
  • This network produces a non-linear alternatingcurrent feedback which, in turn, produces an amplificationor output-dependent, approximately logarithmic feedback or output limiting effect.
  • the circuit components enclosed by the phantom-line box 42 can be constructed as an integrated circuit, at which there are coupled the adjustable or regulatable switching elements, namely the switch 44, the potentiometer Rv as well as the variable resistors Rtl and Rt2. It is, however, also possible to provide, instead of the illustrated amplifier 19, a linearamplifying amplifier which is controlled by a DC- voltage or limited by so-called peak clipping, and which constitutes electrical hardware particularly well known to those skilled in the hearing aid art.
  • An individual hearing aid for wearing by the hard of hearing comprising amplifier means, a microphone system electrically coupled with said amplifier means, said microphone system comprising a first microphone having approximately spherical sensitivity chatacteristics and a second microphone with directed sensitivity characteristics, and means for selectively connecting the amplifier means with one or the other of both microphones.
  • a hearing aid for the hard of hearing comprising amplifier means, a microphone system electrically coupled with said amplifier means, said microphone system comprising a first microphone having approximately spherical sensitivity characteristics and a second microphone with directed sensitivity characteristics, means for selectively connecting the amplifier means with one or the other of both microphones, and further including a housing, a partition wall for subdividing the housing into two compartments, each of the microphones being arranged in a respective compartment of the housing, means defining a sound inlet opening which opens into one of the compartments and means defining two oppositely situated sound inlet openings opening into the other compartment.
  • each of the microphones has a diaphragm which can be placed into oscillation, and wherein said diaphragms are arranged substantially parallel to the partition wall.
  • both microphones are connected via a controlled reversing switch means with a threshold value amplifier constituting said amplifier means, and said threshold value amplifier upon exceeding a predetermined signal peak controls the reversing switch means for switching to said second microphone.
  • both microphones are connected via a controlled reversing switch means with a threshold value amplifier constituting said amplifier means, said threshold value amplifier upon exceeding a predetermined signal peak controlling the reversing switch means forswitching from one of the microphones to the other of themicrophones.
  • hearing aid as defined in claim 1, wherein the hearing aid is a self-contained unit arranged for accommodation on the wearer.

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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)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Circuit For Audible Band Transducer (AREA)
US326550A 1972-02-02 1973-01-24 Hearing aid Expired - Lifetime US3875349A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH154772A CH533408A (de) 1972-02-02 1972-02-02 Hörgerät

Publications (1)

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US3875349A true US3875349A (en) 1975-04-01

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US326550A Expired - Lifetime US3875349A (en) 1972-02-02 1973-01-24 Hearing aid

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US (1) US3875349A (pt)
JP (1) JPS4888803A (pt)
AT (1) AT324459B (pt)
AU (1) AU5101773A (pt)
CH (1) CH533408A (pt)
DE (1) DE2259290A1 (pt)
ES (1) ES410250A1 (pt)
GB (1) GB1383473A (pt)
IT (1) IT971692B (pt)
NL (1) NL7301138A (pt)

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456795A (en) * 1981-02-13 1984-06-26 Rion Kabushiki Kaisha Behind-the-ear type hearing aid
US4622440A (en) * 1984-04-11 1986-11-11 In Tech Systems Corp. Differential hearing aid with programmable frequency response
US4920570A (en) * 1987-12-18 1990-04-24 West Henry L Modular assistive listening system
EP0466676A2 (de) * 1990-07-13 1992-01-15 VIENNATONE Gesellschaft m.b.H. Hörgerät mit Richtmikrofon mit variabler Richtcharakteristik
EP0499699A1 (de) * 1991-02-20 1992-08-26 Phonak Ag Hörgerät mit wenigstens zwei Mikrofonen
WO1994024834A1 (en) * 1993-04-13 1994-10-27 WALDHAUER, Ruth Hearing aid having a microphone switching system
WO1997004617A1 (en) * 1995-07-18 1997-02-06 Comento Ab Personal listening device
US5757933A (en) * 1996-12-11 1998-05-26 Micro Ear Technology, Inc. In-the-ear hearing aid with directional microphone system
US20020009206A1 (en) * 2000-06-30 2002-01-24 Jorgensen Martin Bondo Microphone assembly
EP1192836A1 (en) * 2000-04-07 2002-04-03 Microtronic Nederland B.V. Microphone with range switching
US20030091197A1 (en) * 2001-11-09 2003-05-15 Hans-Ueli Roeck Method for operating a hearing device as well as a hearing device
US20030215106A1 (en) * 2002-05-15 2003-11-20 Lawrence Hagen Diotic presentation of second-order gradient directional hearing aid signals
US6798890B2 (en) 2000-10-05 2004-09-28 Etymotic Research, Inc. Directional microphone assembly
US6813363B2 (en) * 1999-10-14 2004-11-02 Phonak Ag Procedure for setting a hearing aid, and hearing aid
US20050069164A1 (en) * 2003-09-30 2005-03-31 Sivakumar Muthuswamy Microphone system for a communication device
US20050069158A1 (en) * 2003-09-25 2005-03-31 Lu Yao Tsun Packaged piezoelectric exciter module
US6876749B1 (en) * 1999-07-12 2005-04-05 Etymotic Research, Inc. Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics
US20060013420A1 (en) * 2002-09-16 2006-01-19 Sacha Michael K Switching structures for hearing aid
US20060159281A1 (en) * 2005-01-14 2006-07-20 Koh You-Kyung Method and apparatus to record a signal using a beam forming algorithm
US20060262946A1 (en) * 2005-05-20 2006-11-23 Fortemedia, Inc. Multi-microphone capsule
US20080008341A1 (en) * 2006-07-10 2008-01-10 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US7346176B1 (en) * 2000-05-11 2008-03-18 Plantronics, Inc. Auto-adjust noise canceling microphone with position sensor
US20080069390A1 (en) * 2006-09-15 2008-03-20 Fortemedia, Inc. Microphone module at corner or edge of electronic device
EP1919255A2 (en) 2003-05-19 2008-05-07 Widex A/S A hearing aid
US20080159548A1 (en) * 2007-01-03 2008-07-03 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US20090094817A1 (en) * 2007-10-11 2009-04-16 Killion Mead C Directional Microphone Assembly
US7561700B1 (en) * 2000-05-11 2009-07-14 Plantronics, Inc. Auto-adjust noise canceling microphone with position sensor
US20090259091A1 (en) * 2008-03-31 2009-10-15 Cochlear Limited Bone conduction device having a plurality of sound input devices
US20100317913A1 (en) * 2009-05-29 2010-12-16 Otologics, Llc Implantable auditory stimulation system and method with offset implanted microphones
US7881486B1 (en) * 1996-12-31 2011-02-01 Etymotic Research, Inc. Directional microphone assembly
US20120257777A1 (en) * 2009-12-25 2012-10-11 Funai Electric Co., Ltd. Microphone unit and voice input device comprising same
US20120300969A1 (en) * 2010-01-27 2012-11-29 Funai Electric Co., Ltd. Microphone unit and voice input device comprising same
US20140079260A1 (en) * 2011-04-14 2014-03-20 Phonak Ag Hearing instrument
US8737653B2 (en) 2009-12-30 2014-05-27 Starkey Laboratories, Inc. Noise reduction system for hearing assistance devices
US8971559B2 (en) 2002-09-16 2015-03-03 Starkey Laboratories, Inc. Switching structures for hearing aid
US9363608B2 (en) 2011-01-07 2016-06-07 Omron Corporation Acoustic transducer
US9380380B2 (en) 2011-01-07 2016-06-28 Stmicroelectronics S.R.L. Acoustic transducer and interface circuit
EP2897386B1 (en) 2006-03-03 2016-12-21 GN Resound A/S Automatic switching between omnidirectional and directional microphone modes in a hearing aid
DE102008058787B4 (de) * 2008-11-24 2017-06-08 Sennheiser Electronic Gmbh & Co. Kg Mikrofon
US9744000B2 (en) 2011-09-15 2017-08-29 Lanfried Ortho Technology, Llc Intra-oral appliance and methods of using same
US9774961B2 (en) 2005-06-05 2017-09-26 Starkey Laboratories, Inc. Hearing assistance device ear-to-ear communication using an intermediate device
US10003379B2 (en) 2014-05-06 2018-06-19 Starkey Laboratories, Inc. Wireless communication with probing bandwidth
US11071869B2 (en) 2016-02-24 2021-07-27 Cochlear Limited Implantable device having removable portion

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
US4489442A (en) * 1982-09-30 1984-12-18 Shure Brothers, Inc. Sound actuated microphone system
NL8802516A (nl) * 1988-10-13 1990-05-01 Philips Nv Hoorapparaat met rondzing onderdrukking.
DE19948907A1 (de) * 1999-10-11 2001-02-01 Siemens Audiologische Technik Verfahren zur Signalverarbeitung in einer Hörhilfe sowie Hörhilfe
EP3148218B1 (en) * 2015-09-18 2019-12-18 Sonion Nederland B.V. Acoustical module with acoustical filter
US9668065B2 (en) 2015-09-18 2017-05-30 Sonion Nederland B.V. Acoustical module with acoustical filter

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US2783312A (en) * 1952-08-06 1957-02-26 James C Monzon Binaural hearing apparatus and method
US2787671A (en) * 1952-10-06 1957-04-02 Schall Technik Dr Ing Karl Sch Microphone arrangement
US2989597A (en) * 1955-06-30 1961-06-20 John A Victoreen High fidelity sound translating apparatus
US3458668A (en) * 1966-12-06 1969-07-29 Willco Horgerate Medizinische Directional hearing aid

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Publication number Priority date Publication date Assignee Title
US2112569A (en) * 1936-06-16 1938-03-29 E A Myers & Sons Method and apparatus for selecting and prescribing audiphones
US2783312A (en) * 1952-08-06 1957-02-26 James C Monzon Binaural hearing apparatus and method
US2787671A (en) * 1952-10-06 1957-04-02 Schall Technik Dr Ing Karl Sch Microphone arrangement
US2989597A (en) * 1955-06-30 1961-06-20 John A Victoreen High fidelity sound translating apparatus
US3458668A (en) * 1966-12-06 1969-07-29 Willco Horgerate Medizinische Directional hearing aid

Cited By (99)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456795A (en) * 1981-02-13 1984-06-26 Rion Kabushiki Kaisha Behind-the-ear type hearing aid
US4622440A (en) * 1984-04-11 1986-11-11 In Tech Systems Corp. Differential hearing aid with programmable frequency response
US4920570A (en) * 1987-12-18 1990-04-24 West Henry L Modular assistive listening system
EP0466676A2 (de) * 1990-07-13 1992-01-15 VIENNATONE Gesellschaft m.b.H. Hörgerät mit Richtmikrofon mit variabler Richtcharakteristik
EP0466676A3 (en) * 1990-07-13 1992-07-29 Viennatone Gesellschaft M.B.H. Hearing aid with a directive microphone having variable directivity
EP0499699A1 (de) * 1991-02-20 1992-08-26 Phonak Ag Hörgerät mit wenigstens zwei Mikrofonen
US7590253B2 (en) 1993-04-13 2009-09-15 Etymotic Research, Inc. Hearing aid having switchable first and second order directional responses
US7103191B1 (en) 1993-04-13 2006-09-05 Etymotic Research, Inc. Hearing aid having second order directional response
US6101258A (en) * 1993-04-13 2000-08-08 Etymotic Research, Inc. Hearing aid having plural microphones and a microphone switching system
US6327370B1 (en) * 1993-04-13 2001-12-04 Etymotic Research, Inc. Hearing aid having plural microphones and a microphone switching system
WO1994024834A1 (en) * 1993-04-13 1994-10-27 WALDHAUER, Ruth Hearing aid having a microphone switching system
US20020057815A1 (en) * 1993-04-13 2002-05-16 Killion Mead C. Hearing aid having switchable first and second order directional responses
US20070041602A1 (en) * 1993-04-13 2007-02-22 Killion Mead C Hearing aid having switchable first and second order directional responses
WO1997004617A1 (en) * 1995-07-18 1997-02-06 Comento Ab Personal listening device
US5757933A (en) * 1996-12-11 1998-05-26 Micro Ear Technology, Inc. In-the-ear hearing aid with directional microphone system
US6389142B1 (en) 1996-12-11 2002-05-14 Micro Ear Technology In-the-ear hearing aid with directional microphone system
US7286677B2 (en) 1996-12-31 2007-10-23 Etymotic Research, Inc. Directional microphone assembly
US7881486B1 (en) * 1996-12-31 2011-02-01 Etymotic Research, Inc. Directional microphone assembly
US20040247146A1 (en) * 1996-12-31 2004-12-09 Killion Mead C. Directional microphone assembly
US20050169490A1 (en) * 1999-07-12 2005-08-04 Etymotic Research, Inc. Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics
US7245728B2 (en) 1999-07-12 2007-07-17 Etymotic Research, Inc. Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics
US6876749B1 (en) * 1999-07-12 2005-04-05 Etymotic Research, Inc. Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics
US6813363B2 (en) * 1999-10-14 2004-11-02 Phonak Ag Procedure for setting a hearing aid, and hearing aid
EP1192836A1 (en) * 2000-04-07 2002-04-03 Microtronic Nederland B.V. Microphone with range switching
EP1192836A4 (en) * 2000-04-07 2008-10-08 Sonionmicrotronic Nederland MICROPHONE WITH SELECTION OF RANGES
US7561700B1 (en) * 2000-05-11 2009-07-14 Plantronics, Inc. Auto-adjust noise canceling microphone with position sensor
US7346176B1 (en) * 2000-05-11 2008-03-18 Plantronics, Inc. Auto-adjust noise canceling microphone with position sensor
US7953241B2 (en) * 2000-06-30 2011-05-31 Sonion Nederland B.V. Microphone assembly
US20020009206A1 (en) * 2000-06-30 2002-01-24 Jorgensen Martin Bondo Microphone assembly
US6798890B2 (en) 2000-10-05 2004-09-28 Etymotic Research, Inc. Directional microphone assembly
US7925034B2 (en) 2001-11-09 2011-04-12 Phonak Ag Method for operating a hearing device as well as a hearing device
US20030091197A1 (en) * 2001-11-09 2003-05-15 Hans-Ueli Roeck Method for operating a hearing device as well as a hearing device
US20100034405A1 (en) * 2001-11-09 2010-02-11 Phonak Ag Method for operating a hearing device as well as a hearing device
US7822217B2 (en) 2002-05-15 2010-10-26 Micro Ear Technology, Inc. Hearing assistance systems for providing second-order gradient directional signals
US20030215106A1 (en) * 2002-05-15 2003-11-20 Lawrence Hagen Diotic presentation of second-order gradient directional hearing aid signals
US7369669B2 (en) * 2002-05-15 2008-05-06 Micro Ear Technology, Inc. Diotic presentation of second-order gradient directional hearing aid signals
US8284970B2 (en) 2002-09-16 2012-10-09 Starkey Laboratories Inc. Switching structures for hearing aid
US9215534B2 (en) 2002-09-16 2015-12-15 Starkey Laboratories, Inc. Switching stuctures for hearing aid
US8971559B2 (en) 2002-09-16 2015-03-03 Starkey Laboratories, Inc. Switching structures for hearing aid
US20060013420A1 (en) * 2002-09-16 2006-01-19 Sacha Michael K Switching structures for hearing aid
EP1919255A2 (en) 2003-05-19 2008-05-07 Widex A/S A hearing aid
US20050069158A1 (en) * 2003-09-25 2005-03-31 Lu Yao Tsun Packaged piezoelectric exciter module
US20050069164A1 (en) * 2003-09-30 2005-03-31 Sivakumar Muthuswamy Microphone system for a communication device
US7233679B2 (en) * 2003-09-30 2007-06-19 Motorola, Inc. Microphone system for a communication device
US20060159281A1 (en) * 2005-01-14 2006-07-20 Koh You-Kyung Method and apparatus to record a signal using a beam forming algorithm
US7856113B2 (en) * 2005-05-20 2010-12-21 Fortemedia, Inc. Multi-microphone capsule
US20060262946A1 (en) * 2005-05-20 2006-11-23 Fortemedia, Inc. Multi-microphone capsule
US9774961B2 (en) 2005-06-05 2017-09-26 Starkey Laboratories, Inc. Hearing assistance device ear-to-ear communication using an intermediate device
EP2897386B2 (en) † 2006-03-03 2021-08-04 GN Hearing A/S Automatic switching between omnidirectional and directional microphone modes in a hearing aid
EP2897386B1 (en) 2006-03-03 2016-12-21 GN Resound A/S Automatic switching between omnidirectional and directional microphone modes in a hearing aid
US8208642B2 (en) 2006-07-10 2012-06-26 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US9510111B2 (en) 2006-07-10 2016-11-29 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US9036823B2 (en) 2006-07-10 2015-05-19 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US10051385B2 (en) 2006-07-10 2018-08-14 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
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Also Published As

Publication number Publication date
ES410250A1 (es) 1975-12-01
AT324459B (de) 1975-09-10
NL7301138A (pt) 1973-08-06
IT971692B (it) 1974-05-10
DE2259290A1 (de) 1973-08-09
GB1383473A (en) 1974-02-12
JPS4888803A (pt) 1973-11-21
CH533408A (de) 1973-01-31
AU5101773A (en) 1974-07-11

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