EP0802699A2 - Méthode pour éligir électroniquement la distance entre deux transducteurs acoustiques/électroniques et un appareil de prothèse auditive - Google Patents
Méthode pour éligir électroniquement la distance entre deux transducteurs acoustiques/électroniques et un appareil de prothèse auditive Download PDFInfo
- Publication number
- EP0802699A2 EP0802699A2 EP97112125A EP97112125A EP0802699A2 EP 0802699 A2 EP0802699 A2 EP 0802699A2 EP 97112125 A EP97112125 A EP 97112125A EP 97112125 A EP97112125 A EP 97112125A EP 0802699 A2 EP0802699 A2 EP 0802699A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- transducers
- signal
- frequency
- acoustical
- signals
- 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- Withdrawn
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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
- H04R25/407—Circuits for combining signals of a plurality of transducers
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- 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
- H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
- H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing
Definitions
- the present invention is generically directed on a technique according to which acoustical signals are received by at least two acoustical/electrical transducers as e.g. by multidirectional microphones, respective output signals of such transducers are electronically computed so as to generate a result signal which represents said acoustical signals weighted by a spatial characteristic of amplification as a function of spatial angle under which the acoustical signal impinges on the two transducers provided.
- the result signal represents the received acoustical signal weighted by a spatial amplification characteristic as if reception of the acoustical signals had been done by means of e.g. an antenna with an according reception lobe or beam.
- Figure 1 most generically shows such known technique for such "beam forming" on acoustical signals.
- at least two multidirectional acoustical/electrical transducers 2 a and 2 b are provided, which both convert acoustical signal irrespective of their impinging direction ⁇ and thus substantially unweighted with respect to impinging direction ⁇ into electrical output signals A 1 and A 2 .
- the output signals A 1 and A 2 are fed to an electronic signal processor unit 3 which generates from the input signals A 1 , A 2 a result signal A r .
- acoustic signals may selectively be amplified dependent from the fact under which spatial angle ⁇ they impinge, i.e. under which spatial angle the transducer arrangement 2a, 2b "sees" an acoustical source.
- Such processing of the output signals of two omnidirectional order transducers leads to a first order cardoid weighing function F 1 ( ⁇ ) as shown in Fig. 3.
- F 1 ( ⁇ ) a first order cardoid weighing function
- Fig. 3 By respectively selecting transducers with higher order acoustical to electrical conversion characteristic and/or by using more than two transducers, higher order - m - weighing functions F m ( ⁇ ) may be realised.
- f r c/(4p) maximum amplification occurs of +6 dB at the first order cardoid and of +12 dB at a second order cardoid.
- f r is about 7 kHz.
- the distance p P is an important entity as may be seen e.g. from formula (8).
- Formula (8) may be of no special handicap if such technique is used for narrow band signal detection or if no serious limits are encountered for geometrically providing the at least two transducers at a large mutual distance p P .
- the first object of the present invention is reached by providing a method for electronically changing the distance between a first and a second acoustical/electrical transducer, generating, respectively, first and second electrical output signals which represent substantially simultaneously impinging acoustical signals, whereby the first and second electrical output signals are electronically treated so as to generate a result signal which result signal is a function of acoustical signals at least substantially simultaneously received at the two transducers and amplified by a spatial reception characteristic of amplification as a function of spatial angle under which the acoustical signals impinge on the two transducers, which method further comprises the steps of generating a third signal from at least one of the first and second output signals by shifting the phase of at least one of said output signals by an amount according to phase difference of the first and second output signals - being dependent from the physical distance p P of said two transducers - multiplied by a constant factor not equal to unity or by a factor which is a function of frequency, and generating the result signal from
- Multiplying the phase difference by a constant factor does nevertheless not affect the roll-off according to fig. 4.
- This roll-off is significantly improved, leading to an enlarged frequency band B r according to fig. 4 if the predetermined function of frequency is selected as a function which is at least in a first approximation inversely proportional to the frequency of the acoustic signal.
- a hearing aid apparatus which comprises at least two acoustical/electrical transducers spaced from each other by a predetermined distance, whereby the at least two transducers generate, respectively, first and second electrical output signals and wherein the outputs of the acoustical/electrical transducers are operationally connected to a signal processing unit which generates a result output signal from the first and second output signals of the transducers, which result output signal being a function of acoustical signals received at least substantially simultaneously at the two transducers and amplified by a spatial reception characteristic of amplification as a function of spatial angle under which the acoustical signals impinge on the two transducers and which further comprises
- This phase difference is determined and is multiplied by a value dependent from frequency, thus with the respective value of a function M( ⁇ ), which may be also a constant M o # 1.
- f rV is reduced by the factor 1 M ⁇ , taken M ⁇ > 1.
- fig. 7 there is schematically shown a preferred realisation form of an inventive apparatus in a simplified manner, especially for implementing the inventive method into an inventive hearing aid apparatus.
- the output signals of the acoustical/electrical transducer 2 a and 2 b are fed to respective analogue to digital converters 20a, 20b, the outputs thereof being input to time domain to frequency domain - TFC - converter units as to Fast-Fourier Transform units 22a and 22b.
- This multiplication according to (3 V ) is done at a spectral multiplication unit 28.
- Signal A 1 in its spectral representation is then spectrally phase shifted at a spectral phase shifter unit 29 by the multiplied spectral phase difference signals output by multiplier unit 28.
- the resulting spectrum is transformed back by a frequency to time domain converter - FTC - as by an Inverse-Fast-Fourier-Transform unit 24 to result in A r# .
- the frequency dependent function M( ⁇ ) is selected to be, at least in a first approximation, M( ⁇ ) ⁇ 1 ⁇
- the spatial weighing function may be selectively tailored, thereby e.g. to completely suppress signals from unwanted directions, e.g. only to pass signals from within a narrow range of target direction and suppress all others.
- the present invention under its principal object makes it possible to realise beam forming with at least two transducers separated by only a predetermined small distance, due to the fact that electronically there is provided a virtual transducer distance from one of the two physically provided transducers.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Neurosurgery (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Circuit For Audible Band Transducer (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97112125A EP0802699A3 (fr) | 1997-07-16 | 1997-07-16 | Méthode pour éligir électroniquement la distance entre deux transducteurs acoustiques/électroniques et un appareil de prothèse auditive |
CA002296414A CA2296414C (fr) | 1997-07-16 | 1998-07-14 | Procede de selection electronique de la dependance d'un signal de sortie a partir de l'angle spatial de l'incidence du signal acoustique et appareil auditif |
JP2000503683A JP2001510975A (ja) | 1997-07-16 | 1998-07-14 | 音響信号衝突の空間角に対する出力信号の従属関係を電子的に選択する方法および補聴器装置 |
PCT/IB1998/001069 WO1999004598A1 (fr) | 1997-07-16 | 1998-07-14 | Procede de selection electronique de la dependance d'un signal de sortie a partir de l'angle spatial de l'incidence du signal acoustique et appareil auditif |
AT98929585T ATE218025T1 (de) | 1997-07-16 | 1998-07-14 | Verfahren zur elektronischen auswahl der abhängigkeit eines ausgangssignals vom räumlichen winkel des akustischen aufprallsignals und hörhilfegerät |
TR2000/00119T TR200000119T2 (tr) | 1997-07-16 | 1998-07-14 | Akustik sinyal çarpmasının mesafeli açısından, çıktı sinyalinin bağımlılığının elektronik seçimi |
DK98929585T DK0997055T3 (da) | 1997-07-16 | 1998-07-14 | Fremgangsmåde til elektronisk udvælgelse af afhængigheden af et udgangssignal fra den rumlige indfaldsvinkel af et akustisk signal samt høreapparat |
DE69805526T DE69805526T2 (de) | 1997-07-16 | 1998-07-14 | Verfahren zur elektronischen auswahl der abhängigkeit eines ausgangssignals vom räumlichen winkel des akustischen aufprallsignals und hörhilfegerät |
NZ502350A NZ502350A (en) | 1997-07-16 | 1998-07-14 | Processing of hearing aid transducer inputs to enhance directional response |
KR1020007000441A KR20010021877A (ko) | 1997-07-16 | 1998-07-14 | 음향 신호 충돌의 공간각 및 보청기로부터의 출력 신호의의존성을 전기적으로 선택하는 방법 |
AU79281/98A AU749652B2 (en) | 1997-07-16 | 1998-07-14 | Method for electronically selecting the dependency of an output signal from the spatial angle of acoustic signal impingement and hearing aid apparatus |
CN98808183A CN1267444A (zh) | 1997-07-16 | 1998-07-14 | 用来电子选择输出信号与声信号碰撞空间角的相关性的方法和助听器设备 |
EP98929585A EP0997055B1 (fr) | 1997-07-16 | 1998-07-14 | Procede de selection electronique de la dependance d'un signal de sortie a partir de l'angle spatial de l'incidence du signal acoustique et appareil auditif |
IL13399998A IL133999A (en) | 1997-07-16 | 1998-07-14 | Method for electronically selecting the dependence of the outgoing signal from a spatial angle of an intrusive acoustic signal and a hearing aid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97112125A EP0802699A3 (fr) | 1997-07-16 | 1997-07-16 | Méthode pour éligir électroniquement la distance entre deux transducteurs acoustiques/électroniques et un appareil de prothèse auditive |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0802699A2 true EP0802699A2 (fr) | 1997-10-22 |
EP0802699A3 EP0802699A3 (fr) | 1998-02-25 |
Family
ID=8227067
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97112125A Withdrawn EP0802699A3 (fr) | 1997-07-16 | 1997-07-16 | Méthode pour éligir électroniquement la distance entre deux transducteurs acoustiques/électroniques et un appareil de prothèse auditive |
EP98929585A Expired - Lifetime EP0997055B1 (fr) | 1997-07-16 | 1998-07-14 | Procede de selection electronique de la dependance d'un signal de sortie a partir de l'angle spatial de l'incidence du signal acoustique et appareil auditif |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98929585A Expired - Lifetime EP0997055B1 (fr) | 1997-07-16 | 1998-07-14 | Procede de selection electronique de la dependance d'un signal de sortie a partir de l'angle spatial de l'incidence du signal acoustique et appareil auditif |
Country Status (13)
Country | Link |
---|---|
EP (2) | EP0802699A3 (fr) |
JP (1) | JP2001510975A (fr) |
KR (1) | KR20010021877A (fr) |
CN (1) | CN1267444A (fr) |
AT (1) | ATE218025T1 (fr) |
AU (1) | AU749652B2 (fr) |
CA (1) | CA2296414C (fr) |
DE (1) | DE69805526T2 (fr) |
DK (1) | DK0997055T3 (fr) |
IL (1) | IL133999A (fr) |
NZ (1) | NZ502350A (fr) |
TR (1) | TR200000119T2 (fr) |
WO (1) | WO1999004598A1 (fr) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000019770A1 (fr) * | 1998-09-29 | 2000-04-06 | Siemens Audiologische Technik Gmbh | Prothese auditive et procede de traitement de signaux de microphone dans une prothese auditive |
EP1035752A1 (fr) * | 1999-03-05 | 2000-09-13 | Phonak Ag | Procédé pour la mise en forme de la caractéristique spatiale d'amplification de réception d'un agencement de convertisseur et agencement de convertisseur |
WO2001052596A2 (fr) * | 2001-04-18 | 2001-07-19 | Phonak Ag | Procede permettant d'analyser un environnement acoustique et systeme destine a sa mise en oeuvre |
WO2001087011A2 (fr) * | 2000-05-10 | 2001-11-15 | The Board Of Trustees Of The University Of Illinois | Techniques de suppression d'interferences |
EP1351544A2 (fr) * | 2002-03-08 | 2003-10-08 | Gennum Corporation | Système microphonique directionnel à faible bruit |
WO2005109951A1 (fr) * | 2004-05-05 | 2005-11-17 | Deka Products Limited Partnership | Discrimination angulaire de signaux acoustiques ou radio |
US6987856B1 (en) | 1996-06-19 | 2006-01-17 | Board Of Trustees Of The University Of Illinois | Binaural signal processing techniques |
US7206423B1 (en) | 2000-05-10 | 2007-04-17 | Board Of Trustees Of University Of Illinois | Intrabody communication for a hearing aid |
EP1916872A2 (fr) * | 2006-10-23 | 2008-04-30 | Siemens Audiologische Technik GmbH | Système de microphone directionnel différentiel et appareil auditif doté d'un tel système de microphone directionnel différentiel |
US7502479B2 (en) | 2001-04-18 | 2009-03-10 | Phonak Ag | Method for analyzing an acoustical environment and a system to do so |
US7945064B2 (en) | 2003-04-09 | 2011-05-17 | Board Of Trustees Of The University Of Illinois | Intrabody communication with ultrasound |
US20110158426A1 (en) * | 2009-12-28 | 2011-06-30 | Fujitsu Limited | Signal processing apparatus, microphone array device, and storage medium storing signal processing program |
US8103030B2 (en) | 2006-10-23 | 2012-01-24 | Siemens Audiologische Technik Gmbh | Differential directional microphone system and hearing aid device with such a differential directional microphone system |
US8565445B2 (en) | 2008-11-21 | 2013-10-22 | Fujitsu Limited | Combining audio signals based on ranges of phase difference |
DE102010023615B4 (de) * | 2009-06-23 | 2014-01-02 | Fujitsu Limited | Signalverarbeitungsvorrichtung und Signalverarbeitungsverfahren |
GB2575491A (en) * | 2018-07-12 | 2020-01-15 | Centricam Tech Limited | A microphone system |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6307901B1 (en) * | 2000-04-24 | 2001-10-23 | Motorola, Inc. | Turbo decoder with decision feedback equalization |
US7274794B1 (en) | 2001-08-10 | 2007-09-25 | Sonic Innovations, Inc. | Sound processing system including forward filter that exhibits arbitrary directivity and gradient response in single wave sound environment |
US7286672B2 (en) | 2003-03-07 | 2007-10-23 | Phonak Ag | Binaural hearing device and method for controlling a hearing device system |
EP1326478B1 (fr) | 2003-03-07 | 2014-11-05 | Phonak Ag | Procédé de génération des signaux de commande et système d'appareil auditif binaural |
US20040175008A1 (en) | 2003-03-07 | 2004-09-09 | Hans-Ueli Roeck | Method for producing control signals, method of controlling signal and a hearing device |
US8027495B2 (en) | 2003-03-07 | 2011-09-27 | Phonak Ag | Binaural hearing device and method for controlling a hearing device system |
DE10331956C5 (de) | 2003-07-16 | 2010-11-18 | Siemens Audiologische Technik Gmbh | Hörhilfegerät sowie Verfahren zum Betrieb eines Hörhilfegerätes mit einem Mikrofonsystem, bei dem unterschiedliche Richtcharakteistiken einstellbar sind |
EP1513371B1 (fr) | 2004-10-19 | 2012-08-15 | Phonak Ag | Procédé pour actionner une prothèse auditive et prothèse auditive |
US7415372B2 (en) | 2005-08-26 | 2008-08-19 | Step Communications Corporation | Method and apparatus for improving noise discrimination in multiple sensor pairs |
US7619563B2 (en) | 2005-08-26 | 2009-11-17 | Step Communications Corporation | Beam former using phase difference enhancement |
US7472041B2 (en) * | 2005-08-26 | 2008-12-30 | Step Communications Corporation | Method and apparatus for accommodating device and/or signal mismatch in a sensor array |
WO2008061534A1 (fr) | 2006-11-24 | 2008-05-29 | Rasmussen Digital Aps | Traitement de signaux utilisant un filtre spatial |
WO2009062214A1 (fr) * | 2007-11-13 | 2009-05-22 | Akg Acoustics Gmbh | Procédé de synthétisation d'un signal de microphone |
EP2208361B1 (fr) | 2007-11-13 | 2011-02-16 | AKG Acoustics GmbH | Microphone ayant deux transducteurs de gradient de pression |
WO2009105793A1 (fr) | 2008-02-26 | 2009-09-03 | Akg Acoustics Gmbh | Ensemble transducteur |
WO2010125797A1 (fr) * | 2009-04-28 | 2010-11-04 | パナソニック株式会社 | Dispositif d'aide auditive et procédé d'aide auditive |
JP5368272B2 (ja) * | 2009-11-20 | 2013-12-18 | ジェイ・アール・シー特機株式会社 | 音響信号処理装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4751738A (en) * | 1984-11-29 | 1988-06-14 | The Board Of Trustees Of The Leland Stanford Junior University | Directional hearing aid |
JPH0579899A (ja) * | 1991-09-24 | 1993-03-30 | Ono Sokki Co Ltd | 音響インテンシテイ計測装置 |
EP0557166A1 (fr) * | 1992-02-18 | 1993-08-25 | Alcatel Mobile Communication France | Procédé de réduction de bruit acoustique dans un signal de parole |
EP0652686A1 (fr) * | 1993-11-05 | 1995-05-10 | AT&T Corp. | Groupement adaptatif de microphones |
-
1997
- 1997-07-16 EP EP97112125A patent/EP0802699A3/fr not_active Withdrawn
-
1998
- 1998-07-14 AU AU79281/98A patent/AU749652B2/en not_active Ceased
- 1998-07-14 CA CA002296414A patent/CA2296414C/fr not_active Expired - Fee Related
- 1998-07-14 CN CN98808183A patent/CN1267444A/zh active Pending
- 1998-07-14 TR TR2000/00119T patent/TR200000119T2/xx unknown
- 1998-07-14 JP JP2000503683A patent/JP2001510975A/ja active Pending
- 1998-07-14 NZ NZ502350A patent/NZ502350A/xx unknown
- 1998-07-14 KR KR1020007000441A patent/KR20010021877A/ko not_active Application Discontinuation
- 1998-07-14 WO PCT/IB1998/001069 patent/WO1999004598A1/fr not_active Application Discontinuation
- 1998-07-14 DE DE69805526T patent/DE69805526T2/de not_active Expired - Lifetime
- 1998-07-14 DK DK98929585T patent/DK0997055T3/da active
- 1998-07-14 IL IL13399998A patent/IL133999A/en not_active IP Right Cessation
- 1998-07-14 AT AT98929585T patent/ATE218025T1/de not_active IP Right Cessation
- 1998-07-14 EP EP98929585A patent/EP0997055B1/fr not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4751738A (en) * | 1984-11-29 | 1988-06-14 | The Board Of Trustees Of The Leland Stanford Junior University | Directional hearing aid |
JPH0579899A (ja) * | 1991-09-24 | 1993-03-30 | Ono Sokki Co Ltd | 音響インテンシテイ計測装置 |
EP0557166A1 (fr) * | 1992-02-18 | 1993-08-25 | Alcatel Mobile Communication France | Procédé de réduction de bruit acoustique dans un signal de parole |
EP0652686A1 (fr) * | 1993-11-05 | 1995-05-10 | AT&T Corp. | Groupement adaptatif de microphones |
Non-Patent Citations (1)
Title |
---|
ELECTRONICS & COMMUNICATIONS IN JAPAN, vol. 67, no. 12, December 1984, SILVER SPRING , MARYLAND , U.S.A., pages 19-28, XP002050302 Y.KANEDA AND M.TOHYAMA: "NOISE SUPPRESSION SIGNAL PROCESSING USING 2-POINT RECEIVED." * |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6987856B1 (en) | 1996-06-19 | 2006-01-17 | Board Of Trustees Of The University Of Illinois | Binaural signal processing techniques |
WO2000019770A1 (fr) * | 1998-09-29 | 2000-04-06 | Siemens Audiologische Technik Gmbh | Prothese auditive et procede de traitement de signaux de microphone dans une prothese auditive |
US6751325B1 (en) | 1998-09-29 | 2004-06-15 | Siemens Audiologische Technik Gmbh | Hearing aid and method for processing microphone signals in a hearing aid |
AU758366B2 (en) * | 1999-03-05 | 2003-03-20 | Phonak Ag | Method for shaping the spatial reception amplification characteristic of a converter arrangement and converter arrangement |
EP1035752A1 (fr) * | 1999-03-05 | 2000-09-13 | Phonak Ag | Procédé pour la mise en forme de la caractéristique spatiale d'amplification de réception d'un agencement de convertisseur et agencement de convertisseur |
WO2000054553A1 (fr) * | 1999-03-05 | 2000-09-14 | Phonak Ag | Procede de mise en forme de la caracteristique d'amplification a reception spatiale d'un convertisseur et ledit convertisseur |
US6522756B1 (en) | 1999-03-05 | 2003-02-18 | Phonak Ag | Method for shaping the spatial reception amplification characteristic of a converter arrangement and converter arrangement |
US7206423B1 (en) | 2000-05-10 | 2007-04-17 | Board Of Trustees Of University Of Illinois | Intrabody communication for a hearing aid |
WO2001087011A2 (fr) * | 2000-05-10 | 2001-11-15 | The Board Of Trustees Of The University Of Illinois | Techniques de suppression d'interferences |
WO2001087011A3 (fr) * | 2000-05-10 | 2003-03-20 | Univ Illinois | Techniques de suppression d'interferences |
US7502479B2 (en) | 2001-04-18 | 2009-03-10 | Phonak Ag | Method for analyzing an acoustical environment and a system to do so |
US6947570B2 (en) | 2001-04-18 | 2005-09-20 | Phonak Ag | Method for analyzing an acoustical environment and a system to do so |
WO2001052596A3 (fr) * | 2001-04-18 | 2002-06-13 | Phonak Ag | Procede permettant d'analyser un environnement acoustique et systeme destine a sa mise en oeuvre |
WO2001052596A2 (fr) * | 2001-04-18 | 2001-07-19 | Phonak Ag | Procede permettant d'analyser un environnement acoustique et systeme destine a sa mise en oeuvre |
US7409068B2 (en) | 2002-03-08 | 2008-08-05 | Sound Design Technologies, Ltd. | Low-noise directional microphone system |
EP1351544A3 (fr) * | 2002-03-08 | 2008-03-19 | Gennum Corporation | Système microphonique directionnel à faible bruit |
EP1351544A2 (fr) * | 2002-03-08 | 2003-10-08 | Gennum Corporation | Système microphonique directionnel à faible bruit |
US7945064B2 (en) | 2003-04-09 | 2011-05-17 | Board Of Trustees Of The University Of Illinois | Intrabody communication with ultrasound |
WO2005109951A1 (fr) * | 2004-05-05 | 2005-11-17 | Deka Products Limited Partnership | Discrimination angulaire de signaux acoustiques ou radio |
US8275147B2 (en) | 2004-05-05 | 2012-09-25 | Deka Products Limited Partnership | Selective shaping of communication signals |
EP1916872A2 (fr) * | 2006-10-23 | 2008-04-30 | Siemens Audiologische Technik GmbH | Système de microphone directionnel différentiel et appareil auditif doté d'un tel système de microphone directionnel différentiel |
EP1916872A3 (fr) * | 2006-10-23 | 2011-08-17 | Siemens Audiologische Technik GmbH | Système de microphone directionnel différentiel et appareil auditif doté d'un tel système de microphone directionnel différentiel |
US8103030B2 (en) | 2006-10-23 | 2012-01-24 | Siemens Audiologische Technik Gmbh | Differential directional microphone system and hearing aid device with such a differential directional microphone system |
US8565445B2 (en) | 2008-11-21 | 2013-10-22 | Fujitsu Limited | Combining audio signals based on ranges of phase difference |
DE102009052539B4 (de) * | 2008-11-21 | 2014-01-02 | Fujitsu Ltd. | Signalverarbeitungseinheit und Signalverarbeitungsverfahren |
DE102010023615B4 (de) * | 2009-06-23 | 2014-01-02 | Fujitsu Limited | Signalverarbeitungsvorrichtung und Signalverarbeitungsverfahren |
US8638952B2 (en) | 2009-06-23 | 2014-01-28 | Fujitsu Limited | Signal processing apparatus and signal processing method |
US20110158426A1 (en) * | 2009-12-28 | 2011-06-30 | Fujitsu Limited | Signal processing apparatus, microphone array device, and storage medium storing signal processing program |
DE102010055476B4 (de) * | 2009-12-28 | 2014-01-02 | Fujitsu Ltd. | Signalverarbeitungsgerät, Mikrofonarrayvorrichtung und Speichermedium, das ein Signalverarbeitungsprogramm speichert |
GB2575491A (en) * | 2018-07-12 | 2020-01-15 | Centricam Tech Limited | A microphone system |
Also Published As
Publication number | Publication date |
---|---|
AU7928198A (en) | 1999-02-10 |
EP0997055B1 (fr) | 2002-05-22 |
DE69805526D1 (de) | 2002-06-27 |
IL133999A0 (en) | 2001-04-30 |
TR200000119T2 (tr) | 2000-05-22 |
WO1999004598A1 (fr) | 1999-01-28 |
EP0802699A3 (fr) | 1998-02-25 |
CA2296414A1 (fr) | 1999-01-28 |
IL133999A (en) | 2004-03-28 |
AU749652B2 (en) | 2002-06-27 |
EP0997055A1 (fr) | 2000-05-03 |
CN1267444A (zh) | 2000-09-20 |
CA2296414C (fr) | 2005-03-15 |
KR20010021877A (ko) | 2001-03-15 |
NZ502350A (en) | 2002-10-25 |
ATE218025T1 (de) | 2002-06-15 |
DK0997055T3 (da) | 2002-07-22 |
DE69805526T2 (de) | 2002-11-28 |
JP2001510975A (ja) | 2001-08-07 |
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