CA2149686A1 - Directional Microphone System - Google Patents

Directional Microphone System

Info

Publication number
CA2149686A1
CA2149686A1 CA2149686A CA2149686A CA2149686A1 CA 2149686 A1 CA2149686 A1 CA 2149686A1 CA 2149686 A CA2149686 A CA 2149686A CA 2149686 A CA2149686 A CA 2149686A CA 2149686 A1 CA2149686 A1 CA 2149686A1
Authority
CA
Canada
Prior art keywords
sampled signals
spatially sampled
directivity patterns
polar directivity
delayed versions
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.)
Granted
Application number
CA2149686A
Other languages
French (fr)
Other versions
CA2149686C (en
Inventor
John Charles Baumhauer Jr.
Jeffrey Phillip Mcateer
Alan Dean Michel
Christopher T. Welsh
Kevin Dean Willis
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
John Charles Baumhauer Jr.
Jeffrey Phillip Mcateer
Alan Dean Michel
Christopher T. Welsh
Kevin Dean Willis
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 John Charles Baumhauer Jr., Jeffrey Phillip Mcateer, Alan Dean Michel, Christopher T. Welsh, Kevin Dean Willis, At&T Corp. filed Critical John Charles Baumhauer Jr.
Publication of CA2149686A1 publication Critical patent/CA2149686A1/en
Application granted granted Critical
Publication of CA2149686C publication Critical patent/CA2149686C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones

Abstract

Full directional pickup coverage is realized by employing a pickup arrangement which provides a plurality of audio polar directivity patterns, i.e., directional beams. These polar directivity patterns are formed in a unique embodiment of the invention by generating a plurality of frequency independent time-delayed versions of a corresponding plurality of spatially sampled signals and by combining each of the plurality of spatially sampled signals with one or more selected ones of the time delayed versions to generate at least a similar plurality of polar directivity patterns. More specifically, the spatially sampled signals are combined with the delayed versions in such a manner that a greater number of polar directivity patterns can be considered than the number of spatially sampled signals. In a specific embodiment, the spatially sampled signals are acoustic (audio) and a plurality of microphones arranged in a predetermined spatial configuration
CA002149686A 1994-06-30 1995-05-18 Directional microphone system Expired - Lifetime CA2149686C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/268,462 US5506908A (en) 1994-06-30 1994-06-30 Directional microphone system
US268,462 1994-06-30

Publications (2)

Publication Number Publication Date
CA2149686A1 true CA2149686A1 (en) 1995-12-31
CA2149686C CA2149686C (en) 1999-03-23

Family

ID=23023106

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002149686A Expired - Lifetime CA2149686C (en) 1994-06-30 1995-05-18 Directional microphone system

Country Status (4)

Country Link
US (1) US5506908A (en)
EP (1) EP0690657A3 (en)
CN (1) CN1120298A (en)
CA (1) CA2149686C (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2149680A1 (en) * 1994-06-30 1995-12-31 John Charles Baumhauer Jr. Direction finder
US5884254A (en) * 1995-08-02 1999-03-16 Sensimetrics Corporation Method and apparatus for restricting microphone acceptance angle
US6041127A (en) * 1997-04-03 2000-03-21 Lucent Technologies Inc. Steerable and variable first-order differential microphone array
US6173059B1 (en) 1998-04-24 2001-01-09 Gentner Communications Corporation Teleconferencing system with visual feedback
JP2001043310A (en) * 1999-07-30 2001-02-16 Fujitsu Ltd Device and method for correcting document picture
ATE230917T1 (en) * 1999-10-07 2003-01-15 Zlatan Ribic METHOD AND ARRANGEMENT FOR RECORDING SOUND SIGNALS
DE10026078C1 (en) * 2000-05-25 2001-11-08 Siemens Ag Directional microphone set has 5 microphones with figure 8 directional characteristic arranged to provide sine and cosine signals
US7471798B2 (en) * 2000-09-29 2008-12-30 Knowles Electronics, Llc Microphone array having a second order directional pattern
US20020080684A1 (en) * 2000-11-16 2002-06-27 Dimitri Donskoy Large aperture vibration and acoustic sensor
DE10119266A1 (en) * 2001-04-20 2002-10-31 Infineon Technologies Ag Program controlled unit
US7142677B2 (en) * 2001-07-17 2006-11-28 Clarity Technologies, Inc. Directional sound acquisition
DE10296438D2 (en) * 2002-01-24 2004-12-02 Siemens Ag Parameter selection procedure - coordination procedure for parameter selection in protocols (e.g. TandemFreeOperation TFO)
ITMI20020566A1 (en) 2002-03-18 2003-09-18 Daniele Ramenzoni DEVICE TO CAPTURE EVEN SMALL MOVEMENTS IN THE AIR AND IN FLUIDS SUITABLE FOR CYBERNETIC AND LABORATORY APPLICATIONS AS TRANSDUCER
US20040114772A1 (en) * 2002-03-21 2004-06-17 David Zlotnick Method and system for transmitting and/or receiving audio signals with a desired direction
US7751575B1 (en) 2002-09-25 2010-07-06 Baumhauer Jr John C Microphone system for communication devices
DE102004010867B3 (en) * 2004-03-05 2005-08-18 Siemens Audiologische Technik Gmbh Matching phases of microphones of hearing aid directional microphone involves matching second signal level to first by varying transition time of output signal from microphone without taking into account sound source position information
US20060222187A1 (en) * 2005-04-01 2006-10-05 Scott Jarrett Microphone and sound image processing system
DE102005033239A1 (en) * 2005-07-15 2007-01-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for controlling a plurality of loudspeakers by means of a graphical user interface
CN101247669B (en) * 2007-02-15 2012-09-05 歌尔声学股份有限公司 Microphone module group
US8923529B2 (en) * 2008-08-29 2014-12-30 Biamp Systems Corporation Microphone array system and method for sound acquisition
WO2011099167A1 (en) * 2010-02-12 2011-08-18 Panasonic Corporation Sound pickup apparatus, portable communication apparatus, and image pickup apparatus
US20110200205A1 (en) * 2010-02-17 2011-08-18 Panasonic Corporation Sound pickup apparatus, portable communication apparatus, and image pickup apparatus
EP2572516A1 (en) * 2010-05-21 2013-03-27 Bang & Olufsen A/S Circular loudspeaker array with controllable directivity
DE102010053457B4 (en) * 2010-11-16 2016-04-28 Institut für Rundfunktechnik GmbH microphone array
US20130343549A1 (en) * 2012-06-22 2013-12-26 Verisilicon Holdings Co., Ltd. Microphone arrays for generating stereo and surround channels, method of operation thereof and module incorporating the same
JP6819368B2 (en) 2017-03-07 2021-01-27 株式会社リコー Equipment, systems, methods and programs
CN108650593B (en) * 2018-04-25 2020-04-24 恒玄科技(上海)股份有限公司 Three-microphone array far-field pickup method for teleconference

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4536887A (en) * 1982-10-18 1985-08-20 Nippon Telegraph & Telephone Public Corporation Microphone-array apparatus and method for extracting desired signal
US4802227A (en) * 1987-04-03 1989-01-31 American Telephone And Telegraph Company Noise reduction processing arrangement for microphone arrays
JPH0728470B2 (en) * 1989-02-03 1995-03-29 松下電器産業株式会社 Array microphone
IT1232084B (en) * 1989-05-03 1992-01-23 Cselt Centro Studi Lab Telecom CODING SYSTEM FOR WIDE BAND AUDIO SIGNALS
US5193117A (en) * 1989-11-27 1993-03-09 Matsushita Electric Industrial Co., Ltd. Microphone apparatus

Also Published As

Publication number Publication date
CN1120298A (en) 1996-04-10
CA2149686C (en) 1999-03-23
EP0690657A2 (en) 1996-01-03
US5506908A (en) 1996-04-09
EP0690657A3 (en) 1997-01-15

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Effective date: 20150519