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 PDF

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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Withdrawn
Application number
EP05109462A
Other languages
German (de)
French (fr)
Other versions
EP1653768A2 (en
Inventor
Eghart Fischer
Henning Puder
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 Audioligische 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 Audioligische Technik GmbH filed Critical Siemens Audioligische Technik GmbH
Publication of EP1653768A2 publication Critical patent/EP1653768A2/en
Publication of EP1653768A3 publication Critical patent/EP1653768A3/en
Withdrawn legal-status Critical Current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
    • H04R25/407—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.

Figure imgaf001
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.
Figure imgaf001
EP05109462A 2004-11-02 2005-10-12 Method for reducing interference power in a directional microphone and corresponding acoustical system Withdrawn EP1653768A3 (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8942387B2 (en) * 2002-02-05 2015-01-27 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
US9202475B2 (en) * 2008-09-02 2015-12-01 Mh Acoustics Llc Noise-reducing directional microphone ARRAYOCO
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
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
US7409068B2 (en) * 2002-03-08 2008-08-05 Sound Design Technologies, Ltd. Low-noise directional microphone system
US7577262B2 (en) * 2002-11-18 2009-08-18 Panasonic Corporation Microphone device and audio player

Patent Citations (4)

* Cited by examiner, † Cited by third party
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
US20060104459A1 (en) 2006-05-18
EP1653768A2 (en) 2006-05-03
DE102004052912A1 (en) 2006-05-11
US8135142B2 (en) 2012-03-13

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