EP1653768A3 - Method for reducing interference power in a directional microphone and corresponding acoustical system - Google Patents
Method for reducing interference power in a directional microphone and corresponding acoustical system Download PDFInfo
- Publication number
- EP1653768A3 EP1653768A3 EP05109462A EP05109462A EP1653768A3 EP 1653768 A3 EP1653768 A3 EP 1653768A3 EP 05109462 A EP05109462 A EP 05109462A EP 05109462 A EP05109462 A EP 05109462A EP 1653768 A3 EP1653768 A3 EP 1653768A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- interference power
- directional microphone
- reducing interference
- acoustical system
- corresponding acoustical
- 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- Withdrawn
Links
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
-
- 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
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Neurosurgery (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Die Störleistungen bei Richtmikrophonen sollen so weit wie möglich unterdrückt werden. Hierzu ist vorgesehen, die Mikrophonsignale x1(k) und x2(k) mehrerer Mikrophone in Abhängigkeit mindestens eines Parameters adaptiv zu filtern. Die Richtwirkung des hierbei erhaltenen Richtmikrophons wird durch Verändern des mindestens einen Parameters derart eingestellt, dass die Summe von Störleistungen einschließlich Mikrophonrauschen reduziert bzw. minimal ist. The interference power in directional microphones should be suppressed as much as possible. For this purpose, it is provided to adaptively filter the microphone signals x 1 (k) and x 2 (k) of several microphones as a function of at least one parameter. The directivity of the directional microphone obtained in this case is adjusted by changing the at least one parameter such that the sum of noise power including microphone noise is reduced or minimal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004052912A DE102004052912A1 (en) | 2004-11-02 | 2004-11-02 | Method for reducing interference power in a directional microphone and corresponding acoustic system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1653768A2 EP1653768A2 (en) | 2006-05-03 |
EP1653768A3 true EP1653768A3 (en) | 2010-06-02 |
Family
ID=35355569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05109462A Withdrawn EP1653768A3 (en) | 2004-11-02 | 2005-10-12 | Method for reducing interference power in a directional microphone and corresponding acoustical system |
Country Status (3)
Country | Link |
---|---|
US (1) | US8135142B2 (en) |
EP (1) | EP1653768A3 (en) |
DE (1) | DE102004052912A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007106399A2 (en) | 2006-03-10 | 2007-09-20 | Mh Acoustics, Llc | Noise-reducing directional microphone array |
ATE450987T1 (en) | 2006-06-23 | 2009-12-15 | Gn Resound As | HEARING INSTRUMENT WITH ADAPTIVE DIRECTIONAL SIGNAL PROCESSING |
DE102007001642A1 (en) | 2007-01-11 | 2008-07-24 | Siemens Audiologische Technik Gmbh | Method for reducing interference power and corresponding acoustic system |
DE102007010601A1 (en) | 2007-03-05 | 2008-09-25 | Siemens Audiologische Technik Gmbh | Hearing system with distributed signal processing and corresponding method |
WO2009143434A2 (en) * | 2008-05-23 | 2009-11-26 | Analog Devices, Inc. | Wide dynamic range microphone |
DE102008055760A1 (en) | 2008-11-04 | 2010-05-20 | Siemens Medical Instruments Pte. Ltd. | Adaptive microphone system for a hearing aid and associated method of operation |
DE102009014053B4 (en) * | 2009-03-19 | 2012-11-22 | Siemens Medical Instruments Pte. Ltd. | Method for setting a directional characteristic and hearing devices |
US9232310B2 (en) * | 2012-10-15 | 2016-01-05 | Nokia Technologies Oy | Methods, apparatuses and computer program products for facilitating directional audio capture with multiple microphones |
EP2848007B1 (en) * | 2012-10-15 | 2021-03-17 | MH Acoustics, LLC | Noise-reducing directional microphone array |
WO2014103066A1 (en) * | 2012-12-28 | 2014-07-03 | 共栄エンジニアリング株式会社 | Sound-source separation method, device, and program |
AU2014231751A1 (en) | 2013-03-12 | 2015-07-30 | Hear Ip Pty Ltd | A noise reduction method and system |
CN116017635B (en) * | 2022-12-16 | 2023-09-05 | 广东保伦电子股份有限公司 | Frequency scanning method and server for digital U-section wireless microphone |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000001200A1 (en) * | 1998-06-30 | 2000-01-06 | University Of Stirling | Method and apparatus for processing sound |
WO2001001731A1 (en) * | 1999-06-24 | 2001-01-04 | Widex A/S | A method for controlling the directionality of the sound receiving characteristic of a hearing aid and a hearing aid for carrying out the method |
WO2001097558A2 (en) * | 2000-06-13 | 2001-12-20 | Gn Resound Corporation | Fixed polar-pattern-based adaptive directionality systems |
DE10327889B3 (en) * | 2003-06-20 | 2004-09-16 | Siemens Audiologische Technik Gmbh | Adjusting hearing aid with microphone system with variable directional characteristic involves adjusting directional characteristic depending on acoustic input signal frequency and hearing threshold |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5224170A (en) * | 1991-04-15 | 1993-06-29 | Hewlett-Packard Company | Time domain compensation for transducer mismatch |
DE10024267A1 (en) * | 2000-05-17 | 2001-11-29 | Bosch Gmbh Robert | Radio receiver for receiving digital radio signals and method for receiving digital radio signals |
EP1351544A3 (en) * | 2002-03-08 | 2008-03-19 | Gennum Corporation | Low-noise directional microphone system |
US7577262B2 (en) * | 2002-11-18 | 2009-08-18 | Panasonic Corporation | Microphone device and audio player |
-
2004
- 2004-11-02 DE DE102004052912A patent/DE102004052912A1/en not_active Withdrawn
-
2005
- 2005-10-12 EP EP05109462A patent/EP1653768A3/en not_active Withdrawn
- 2005-10-31 US US11/263,429 patent/US8135142B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000001200A1 (en) * | 1998-06-30 | 2000-01-06 | University Of Stirling | Method and apparatus for processing sound |
WO2001001731A1 (en) * | 1999-06-24 | 2001-01-04 | Widex A/S | A method for controlling the directionality of the sound receiving characteristic of a hearing aid and a hearing aid for carrying out the method |
WO2001097558A2 (en) * | 2000-06-13 | 2001-12-20 | Gn Resound Corporation | Fixed polar-pattern-based adaptive directionality systems |
DE10327889B3 (en) * | 2003-06-20 | 2004-09-16 | Siemens Audiologische Technik Gmbh | Adjusting hearing aid with microphone system with variable directional characteristic involves adjusting directional characteristic depending on acoustic input signal frequency and hearing threshold |
Also Published As
Publication number | Publication date |
---|---|
DE102004052912A1 (en) | 2006-05-11 |
EP1653768A2 (en) | 2006-05-03 |
US20060104459A1 (en) | 2006-05-18 |
US8135142B2 (en) | 2012-03-13 |
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Effective date: 20101203 |