DE69207994D1 - Adjustierbarer Filter für Differentialmikrofone - Google Patents

Adjustierbarer Filter für Differentialmikrofone

Info

Publication number
DE69207994D1
DE69207994D1 DE69207994T DE69207994T DE69207994D1 DE 69207994 D1 DE69207994 D1 DE 69207994D1 DE 69207994 T DE69207994 T DE 69207994T DE 69207994 T DE69207994 T DE 69207994T DE 69207994 D1 DE69207994 D1 DE 69207994D1
Authority
DE
Germany
Prior art keywords
adjustable filter
differential microphones
microphones
differential
adjustable
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.)
Expired - Fee Related
Application number
DE69207994T
Other languages
English (en)
Other versions
DE69207994T2 (de
Inventor
Gary Wayne Elko
Robert Alfred Kubli
Dennis R Morgan
James Edward West
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.)
AT&T Corp
Original Assignee
AT&T Corp
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 AT&T Corp filed Critical AT&T Corp
Application granted granted Critical
Publication of DE69207994D1 publication Critical patent/DE69207994D1/de
Publication of DE69207994T2 publication Critical patent/DE69207994T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
    • 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
    • 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
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
DE69207994T 1991-07-17 1992-07-08 Adjustierbarer Filter für Differentialmikrofone Expired - Fee Related DE69207994T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73156091A 1991-07-17 1991-07-17

Publications (2)

Publication Number Publication Date
DE69207994D1 true DE69207994D1 (de) 1996-03-14
DE69207994T2 DE69207994T2 (de) 1996-06-27

Family

ID=24940035

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69207994T Expired - Fee Related DE69207994T2 (de) 1991-07-17 1992-07-08 Adjustierbarer Filter für Differentialmikrofone

Country Status (6)

Country Link
US (2) US5303307A (de)
EP (1) EP0527556B1 (de)
JP (1) JPH0750896A (de)
CA (1) CA2069356C (de)
DE (1) DE69207994T2 (de)
ES (1) ES2083092T3 (de)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2069356C (en) * 1991-07-17 1997-05-06 Gary Wayne Elko Adjustable filter for differential microphones
JPH07298387A (ja) * 1994-04-28 1995-11-10 Canon Inc ステレオ音声入力装置
US5651074A (en) * 1995-05-11 1997-07-22 Lucent Technologies Inc. Noise canceling gradient microphone assembly
EP0766494B1 (de) * 1995-09-29 2002-08-14 STMicroelectronics S.r.l. Digitale mikrophonische Vorrichtung
JP4392513B2 (ja) 1995-11-02 2010-01-06 バン アンド オルフセン アクティー ゼルスカブ 室内のスピーカシステムを制御する方法及び装置
JPH09326844A (ja) * 1996-06-03 1997-12-16 Mitsubishi Electric Corp 騒音低減通話装置及び騒音低減通話方法
IES77868B2 (en) * 1996-08-30 1998-01-14 Nokia Mobile Phones Ltd A handset and a connector therefor
US6603861B1 (en) * 1997-08-20 2003-08-05 Phonak Ag Method for electronically beam forming acoustical signals and acoustical sensor apparatus
WO2000001198A1 (en) * 1998-06-30 2000-01-06 Resound Corporation System for reducing the effects of acoustically noisy environments on detected sound signals
US7146013B1 (en) * 1999-04-28 2006-12-05 Alpine Electronics, Inc. Microphone system
NZ502603A (en) * 2000-02-02 2002-09-27 Ind Res Ltd Multitransducer microphone arrays with signal processing for high resolution sound field recording
US6549630B1 (en) * 2000-02-04 2003-04-15 Plantronics, Inc. Signal expander with discrimination between close and distant acoustic source
DE60129941T2 (de) * 2001-06-28 2008-05-08 Stmicroelectronics S.R.L., Agrate Brianza Ein Prozess zur Rauschreduzierung insbesondere für Audiosysteme und zugehörige Vorrichtung und Computerprogrammprodukt
US7123727B2 (en) * 2001-07-18 2006-10-17 Agere Systems Inc. Adaptive close-talking differential microphone array
US6584203B2 (en) 2001-07-18 2003-06-24 Agere Systems Inc. Second-order adaptive differential microphone array
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
US7245726B2 (en) * 2001-10-03 2007-07-17 Adaptive Technologies, Inc. Noise canceling microphone system and method for designing the same
JP4210897B2 (ja) * 2002-03-18 2009-01-21 ソニー株式会社 音源方向判断装置及び音源方向判断方法
JP3908598B2 (ja) * 2002-05-29 2007-04-25 富士通株式会社 波動信号処理システム及び方法
US7751575B1 (en) 2002-09-25 2010-07-06 Baumhauer Jr John C Microphone system for communication devices
CA2522896A1 (en) * 2003-04-23 2004-11-04 Rh Lyon Corp Method and apparatus for sound transduction with minimal interference from background noise and minimal local acoustic radiation
WO2006006935A1 (en) * 2004-07-08 2006-01-19 Agency For Science, Technology And Research Capturing sound from a target region
US7817805B1 (en) 2005-01-12 2010-10-19 Motion Computing, Inc. System and method for steering the directional response of a microphone to a moving acoustic source
US20070050441A1 (en) * 2005-08-26 2007-03-01 Step Communications Corporation,A Nevada Corporati Method and apparatus for improving noise discrimination using attenuation factor
US7619563B2 (en) * 2005-08-26 2009-11-17 Step Communications Corporation Beam former using phase difference enhancement
US20070047743A1 (en) * 2005-08-26 2007-03-01 Step Communications Corporation, A Nevada Corporation Method and apparatus for improving noise discrimination using enhanced phase difference value
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
US20070047742A1 (en) * 2005-08-26 2007-03-01 Step Communications Corporation, A Nevada Corporation Method and system for enhancing regional sensitivity noise discrimination
US7436188B2 (en) * 2005-08-26 2008-10-14 Step Communications Corporation System and method for improving time domain processed sensor signals
US7415372B2 (en) * 2005-08-26 2008-08-19 Step Communications Corporation Method and apparatus for improving noise discrimination in multiple sensor pairs
US7460024B1 (en) 2006-01-17 2008-12-02 National Semiconductor Corporation Active sensor circuitry for operating at low power and low duty cycle while monitoring occurrence of anticipated event
US7864969B1 (en) 2006-02-28 2011-01-04 National Semiconductor Corporation Adaptive amplifier circuitry for microphone array
US7676052B1 (en) 2006-02-28 2010-03-09 National Semiconductor Corporation Differential microphone assembly
US8180067B2 (en) * 2006-04-28 2012-05-15 Harman International Industries, Incorporated System for selectively extracting components of an audio input signal
US8036767B2 (en) 2006-09-20 2011-10-11 Harman International Industries, Incorporated System for extracting and changing the reverberant content of an audio input signal
US7953233B2 (en) * 2007-03-20 2011-05-31 National Semiconductor Corporation Synchronous detection and calibration system and method for differential acoustic sensors
US20090018826A1 (en) * 2007-07-13 2009-01-15 Berlin Andrew A Methods, Systems and Devices for Speech Transduction
US8229126B2 (en) * 2009-03-13 2012-07-24 Harris Corporation Noise error amplitude reduction
CA2774415C (en) * 2009-10-05 2017-09-05 Harman International Industries, Incorporated System for spatial extraction of audio signals
US9648421B2 (en) 2011-12-14 2017-05-09 Harris Corporation Systems and methods for matching gain levels of transducers
JP5948969B2 (ja) * 2012-03-02 2016-07-06 富士ゼロックス株式会社 音声解析装置、音声解析システムおよびプログラム
JP2013213739A (ja) * 2012-04-02 2013-10-17 Nippon Telegr & Teleph Corp <Ntt> 音源位置推定装置、音源位置推定方法及びそのプログラム
US20140112483A1 (en) * 2012-10-24 2014-04-24 Alcatel-Lucent Usa Inc. Distance-based automatic gain control and proximity-effect compensation
US9866938B2 (en) * 2015-02-19 2018-01-09 Knowles Electronics, Llc Interface for microphone-to-microphone communications
US10034111B1 (en) * 2017-05-11 2018-07-24 Stmicroelectronics, Inc. TOF based gain control

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE379274C (de) * 1923-08-20 Raimund Gabriel Fenster- und Tuerbeschlag mit einem oder zwei lappenlosen Angelzapfen
US4354059A (en) * 1979-09-11 1982-10-12 Victor Company Of Japan, Ltd. Variable-directivity microphone device
US4412097A (en) * 1980-01-28 1983-10-25 Victor Company Of Japan, Ltd. Variable-directivity microphone device
US4393275A (en) * 1981-09-30 1983-07-12 Beltone Electronics Corporation Hearing aid with controllable wide range of frequency response
AT379274B (de) * 1983-12-22 1985-12-10 Akg Akustische Kino Geraete Anordnung zur unterdrueckung der amplitudenspitzen am beginn von explosivlauten in einem elektroakustischen uebertragungssystem, an dessen eingang ein mikrophon angeordnet ist
US4941187A (en) * 1984-02-03 1990-07-10 Slater Robert W Intercom apparatus for integrating disparate audio sources for use in light aircraft or similar high noise environments
JPS60194900A (ja) * 1984-03-16 1985-10-03 Hitachi Ltd マイクロホンシステム
DE3630692A1 (de) * 1985-09-10 1987-04-30 Canon Kk Tonsignaluebertragungssystem
CA1236607A (en) * 1985-09-23 1988-05-10 Northern Telecom Limited Microphone arrangement
US4741038A (en) * 1986-09-26 1988-04-26 American Telephone And Telegraph Company, At&T Bell Laboratories Sound location arrangement
JPH071959B2 (ja) * 1986-09-26 1995-01-11 松下電器産業株式会社 収音装置
JPS63262577A (ja) * 1987-04-20 1988-10-28 Sony Corp マイクロホン装置
JPH02230896A (ja) * 1989-03-03 1990-09-13 Nippon Telegr & Teleph Corp <Ntt> 音響信号入力装置
AT407815B (de) * 1990-07-13 2001-06-25 Viennatone Gmbh Hörgerät
CA2069356C (en) * 1991-07-17 1997-05-06 Gary Wayne Elko Adjustable filter for differential microphones

Also Published As

Publication number Publication date
EP0527556A1 (de) 1993-02-17
DE69207994T2 (de) 1996-06-27
US5586191A (en) 1996-12-17
JPH0750896A (ja) 1995-02-21
EP0527556B1 (de) 1996-01-31
US5303307A (en) 1994-04-12
ES2083092T3 (es) 1996-04-01
CA2069356C (en) 1997-05-06
CA2069356A1 (en) 1993-01-18

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee