CA2016301A1 - Microphones directionnel par image - Google Patents

Microphones directionnel par image

Info

Publication number
CA2016301A1
CA2016301A1 CA2016301A CA2016301A CA2016301A1 CA 2016301 A1 CA2016301 A1 CA 2016301A1 CA 2016301 A CA2016301 A CA 2016301A CA 2016301 A CA2016301 A CA 2016301A CA 2016301 A1 CA2016301 A1 CA 2016301A1
Authority
CA
Canada
Prior art keywords
sensor
reflecting surface
order gradient
directional microphones
resulting
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
CA2016301A
Other languages
English (en)
Other versions
CA2016301C (fr
Inventor
Gary Wayne Elko
Robert Alfred Kubli
Jeffrey Phillip Mcateer
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
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2016301A1 publication Critical patent/CA2016301A1/fr
Application granted granted Critical
Publication of CA2016301C publication Critical patent/CA2016301C/fr
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
    • 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
    • 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
    • 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
    • H04R1/326—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for 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
    • H04R1/34—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
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Stereophonic Arrangements (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
CA002016301A 1989-05-19 1990-05-08 Microphones directionnel par image Expired - Lifetime CA2016301C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/354,535 US4965775A (en) 1989-05-19 1989-05-19 Image derived directional microphones
US354,535 1989-05-19

Publications (2)

Publication Number Publication Date
CA2016301A1 true CA2016301A1 (fr) 1990-11-19
CA2016301C CA2016301C (fr) 1995-04-18

Family

ID=23393767

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002016301A Expired - Lifetime CA2016301C (fr) 1989-05-19 1990-05-08 Microphones directionnel par image

Country Status (8)

Country Link
US (1) US4965775A (fr)
EP (1) EP0398595B1 (fr)
JP (1) JPH0736635B2 (fr)
KR (1) KR0152663B1 (fr)
CA (1) CA2016301C (fr)
DE (1) DE69021770T2 (fr)
DK (1) DK0398595T3 (fr)
HK (1) HK33896A (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5289544A (en) * 1991-12-31 1994-02-22 Audiological Engineering Corporation Method and apparatus for reducing background noise in communication systems and for enhancing binaural hearing systems for the hearing impaired
DE4315000A1 (de) * 1993-05-06 1994-11-10 Opel Adam Ag Geräuschkompensierte Freisprechanlage in Kraftfahrzeugen
US5561737A (en) * 1994-05-09 1996-10-01 Lucent Technologies Inc. Voice actuated switching system
US6204796B1 (en) 1994-07-01 2001-03-20 Gemstar Development Corporation Apparatus and methods for generating codes for controlling appliances from a remote controller
JPH08107683A (ja) * 1994-10-03 1996-04-23 Mitsubishi Electric Corp 電動機の運転制御装置及び絶縁型双方向直流電圧変換回路
US5625697A (en) * 1995-05-08 1997-04-29 Lucent Technologies Inc. Microphone selection process for use in a multiple microphone voice actuated switching system
US5748757A (en) 1995-12-27 1998-05-05 Lucent Technologies Inc. Collapsible image derived differential microphone
US5742693A (en) * 1995-12-29 1998-04-21 Lucent Technologies Inc. Image-derived second-order directional microphones with finite baffle
US5781643A (en) * 1996-08-16 1998-07-14 Shure Brothers Incorporated Microphone plosive effects reduction techniques
US6122389A (en) * 1998-01-20 2000-09-19 Shure Incorporated Flush mounted directional microphone
WO2001074117A1 (fr) * 2000-03-24 2001-10-04 Intel Corporation Systeme de commande sonore spatial
AU2002243224A1 (en) * 2000-11-16 2002-06-24 The Trustees Of The Stevens Institute Of Technology Large aperture vibration and acoustic sensor
US7146014B2 (en) 2002-06-11 2006-12-05 Intel Corporation MEMS directional sensor system
US20070052549A1 (en) * 2005-08-22 2007-03-08 Contec Corporation Apparatus and method for updating encoded signal information stored in a remote control unit through direct key entry
US7697827B2 (en) 2005-10-17 2010-04-13 Konicek Jeffrey C User-friendlier interfaces for a camera
US7676052B1 (en) 2006-02-28 2010-03-09 National Semiconductor Corporation Differential microphone assembly
US7653487B2 (en) * 2006-10-06 2010-01-26 Toyota Motor Engineering & Manufacturing North America, Inc. Object detection apparatus and method
JP5168079B2 (ja) * 2008-10-22 2013-03-21 ヤマハ株式会社 音響装置
NO332961B1 (no) 2008-12-23 2013-02-11 Cisco Systems Int Sarl Forhoyet toroidmikrofonapparat
TWI441525B (zh) * 2009-11-03 2014-06-11 Ind Tech Res Inst 室內收音系統及室內收音方法
NO20093511A1 (no) 2009-12-14 2011-06-15 Tandberg Telecom As Toroidemikrofon
USD743382S1 (en) * 2013-09-20 2015-11-17 Panasonic Intellectual Property Management Co., Ltd. Microphone
US10028051B2 (en) * 2015-08-31 2018-07-17 Panasonic Intellectual Property Management Co., Ltd. Sound source localization apparatus
USD895566S1 (en) 2019-02-04 2020-09-08 Biamp Systems, LLC Speaker with amplifier
KR20200133632A (ko) * 2019-05-20 2020-11-30 삼성전자주식회사 지향성 음향 센서 및 이를 이용한 음원 거리 측정방법
US10904657B1 (en) 2019-10-11 2021-01-26 Plantronics, Inc. Second-order gradient microphone system with baffles for teleconferencing

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1735905A (en) * 1926-12-30 1929-11-19 American Telephone & Telegraph Microphone mounting
US2457527A (en) * 1942-10-02 1948-12-28 Bell Telephone Labor Inc Acoustic device
US3068328A (en) * 1956-05-10 1962-12-11 Murray M Rosenfeld Pressure gradient transducers
US4675906A (en) * 1984-12-20 1987-06-23 At&T Company, At&T Bell Laboratories Second order toroidal microphone
US4742548A (en) * 1984-12-20 1988-05-03 American Telephone And Telegraph Company Unidirectional second order gradient microphone
US4589137A (en) * 1985-01-03 1986-05-13 The United States Of America As Represented By The Secretary Of The Navy Electronic noise-reducing system
US4658425A (en) * 1985-04-19 1987-04-14 Shure Brothers, Inc. Microphone actuation control system suitable for teleconference systems
US4802227A (en) * 1987-04-03 1989-01-31 American Telephone And Telegraph Company Noise reduction processing arrangement for microphone arrays

Also Published As

Publication number Publication date
JPH0736635B2 (ja) 1995-04-19
HK33896A (en) 1996-03-08
DE69021770D1 (de) 1995-09-28
EP0398595A2 (fr) 1990-11-22
JPH03101399A (ja) 1991-04-26
US4965775A (en) 1990-10-23
EP0398595A3 (fr) 1991-11-06
EP0398595B1 (fr) 1995-08-23
KR900019527A (ko) 1990-12-24
KR0152663B1 (ko) 1998-11-02
CA2016301C (fr) 1995-04-18
DE69021770T2 (de) 1996-01-11
DK0398595T3 (da) 1995-10-02

Similar Documents

Publication Publication Date Title
CA2016301A1 (fr) Microphones directionnel par image
KR940003447B1 (ko) 단일지향성 마이크로폰 장치 및 단일지향성 마이크로폰 감도 패턴 형성방법
JPS5388718A (en) Sealed head phone
CA2262581A1 (fr) Projecteurs d'ondes de pression electrohydraulique
DE69329001D1 (de) Elektroakustischer Wandler mit mehreren Lautsprechern
CA2296414A1 (fr) 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
WO1989007876A1 (fr) Transducteur audio perfectionne avec membrane a souplesse modulee
ATE179297T1 (de) Paneelförmige mikrofone
FR2663182B1 (fr) Transducteur electro-acoustique immerge.
ATE106650T1 (de) Elektroakustischer wandler.
AU5463380A (en) Diaphragm for electroacoustic transducers
FR2637147B1 (fr) Enceinte electro-acoustique omnidirectionnelle
CA1035458A (fr) Transducteur d'ondes acoustiques de surface a stabilite accrue
CA2150857A1 (fr) Filtre fonctionnant avec des ondes de surfaces acoustiques
US3890513A (en) Acoustic transducer
IT1303933B1 (it) Trasduttore elettro-acustico flessotensionale
GB9114907D0 (en) Planar board diaphragm for electro-acoustic transducers
JPS55477A (en) Location of sound source
JPS5639667A (en) Directional transmission-reception unit
RU1774374C (ru) Устройство контрол звука
JPS5848865Y2 (ja) 電気音響変換器
KR900009386U (ko) 스피커의 진동판
DK155591D0 (da) Resonant plademembran til en elektro-akustisk transducer
El-Messiry Effect of orientation and directional factors of loudspeakers on the acoustic feedback
JPS55151889A (en) Speaker reproducing system

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry