CA2032080A1 - Directional microphone assembly - Google Patents

Directional microphone assembly

Info

Publication number
CA2032080A1
CA2032080A1 CA2032080A CA2032080A CA2032080A1 CA 2032080 A1 CA2032080 A1 CA 2032080A1 CA 2032080 A CA2032080 A CA 2032080A CA 2032080 A CA2032080 A CA 2032080A CA 2032080 A1 CA2032080 A1 CA 2032080A1
Authority
CA
Canada
Prior art keywords
housing
sound
sound pressure
acoustically
diaphragm
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
CA2032080A
Other languages
French (fr)
Other versions
CA2032080C (en
Inventor
John Charles Baumhauer Jr.
Jeffrey Phillip Mcateer
Frederick Allen Rosebrock
Richard M. Sachs
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 CA2032080A1 publication Critical patent/CA2032080A1/en
Application granted granted Critical
Publication of CA2032080C publication Critical patent/CA2032080C/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

A directional microphone assembly is constructed from a first-order-gradient microphone element enclosed within a housing, molded from an acoustically-opaque, resilient material such as Ethylene-Propylene-Diene-Monomer.
The microphone element includes a diaphragm which moves under the influence of sound pressures applied on its opposite surface to generate an electrical signalwhich is proportional to the differential sound pressure. The housing includes a first acoustically-transparant channel for communicating sound pressure from a first opening in the housing to one surface of the diaphragm, and a second acoustically-transparent channel for communicating sound pressure from a second opening in the housing to the other surface of the diaphragm. The housing supports the microphone element and forms a continuous seal around its perimeter so that sound pressure in one channel does not leak into the other. The distance between the openings is relatively large in order to improve the sensitivity and directivity of the microphone.
Moreover, the directional microphone assembly is configured to be embedded within, or behind, an exterior surface of sound-input equipment with the openings of the housing located along the exterior surface. The resilient housing structure forms a seal with the sound-input equipment surface.
CA002032080A 1990-02-28 1990-12-12 Directional microphone assembly Expired - Lifetime CA2032080C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48644490A 1990-02-28 1990-02-28
US486,444 1990-02-28

Publications (2)

Publication Number Publication Date
CA2032080A1 true CA2032080A1 (en) 1991-08-29
CA2032080C CA2032080C (en) 1996-07-23

Family

ID=23931916

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002032080A Expired - Lifetime CA2032080C (en) 1990-02-28 1990-12-12 Directional microphone assembly

Country Status (3)

Country Link
JP (1) JP2664005B2 (en)
KR (1) KR0158893B1 (en)
CA (1) CA2032080C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8180082B2 (en) 2007-04-04 2012-05-15 Funai Electric Advanced Applied Technology Research Institute Inc. Microphone unit, close-talking voice input device, information processing system, and method of manufacturing microphone unit
US8638955B2 (en) 2006-11-22 2014-01-28 Funai Electric Advanced Applied Technology Research Institute Inc. Voice input device, method of producing the same, and information processing system

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5890232A (en) * 1997-11-25 1999-04-06 Park; Nam-Tae Helmet with an air cushion buffer
KR20030082153A (en) * 2002-04-16 2003-10-22 주식회사 더웨이테크 Transcription method using polypropylene film
KR100936684B1 (en) * 2005-01-13 2010-01-13 후지쯔 가부시끼가이샤 Sound receiver
JP4894353B2 (en) * 2006-05-26 2012-03-14 ヤマハ株式会社 Sound emission and collection device
JP5097511B2 (en) * 2007-11-19 2012-12-12 株式会社船井電機新応用技術研究所 Voice input device, manufacturing method thereof, and information processing system
JP2009239631A (en) 2008-03-27 2009-10-15 Funai Electric Advanced Applied Technology Research Institute Inc Microphone unit, close-talking voice input device, information processing system, and manufacturing method for microphone unit
EP2007167A3 (en) 2007-06-21 2013-01-23 Funai Electric Advanced Applied Technology Research Institute Inc. Voice input-output device and communication device
JP5114106B2 (en) * 2007-06-21 2013-01-09 株式会社船井電機新応用技術研究所 Voice input / output device and communication device
JP5257920B2 (en) * 2007-10-16 2013-08-07 船井電機株式会社 Mobile phone and microphone unit
JP5250899B2 (en) * 2007-10-16 2013-07-31 船井電機株式会社 Mobile phone and microphone unit
JP2009135661A (en) * 2007-11-29 2009-06-18 Funai Electric Co Ltd Microphone unit, manufacturing method thereof and sound input device
JP5166007B2 (en) * 2007-11-30 2013-03-21 船井電機株式会社 Microphone unit and manufacturing method thereof
NO20076609A (en) 2007-12-21 2009-03-16 Tandberg Telecom As Microphone device
JP5166117B2 (en) 2008-05-20 2013-03-21 株式会社船井電機新応用技術研究所 Voice input device, manufacturing method thereof, and information processing system
JP2009284110A (en) * 2008-05-20 2009-12-03 Funai Electric Advanced Applied Technology Research Institute Inc Voice input device and method of manufacturing the same, and information processing system
JP5129024B2 (en) * 2008-05-27 2013-01-23 株式会社船井電機新応用技術研究所 Audio input device and audio conference system
JP5008638B2 (en) * 2008-12-01 2012-08-22 株式会社船井電機新応用技術研究所 Microphone unit, voice input device, information processing system, and method of manufacturing microphone unit
JP5325554B2 (en) 2008-12-05 2013-10-23 船井電機株式会社 Voice input device
JP5502313B2 (en) 2008-12-05 2014-05-28 船井電機株式会社 Microphone unit
JP5325555B2 (en) 2008-12-05 2013-10-23 船井電機株式会社 Microphone unit
JP5262859B2 (en) * 2009-03-09 2013-08-14 船井電機株式会社 Microphone unit
JP6260878B2 (en) * 2016-05-27 2018-01-17 株式会社アイエヌジー Image transfer sheet, image transfer sheet manufacturing method, and image transfer method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922989B2 (en) * 1978-03-23 1984-05-30 横河電機株式会社 signal generator
NL8304401A (en) * 1983-12-22 1985-07-16 Philips Nv OXYD CATHODE.
JPS63197188A (en) * 1987-02-12 1988-08-16 Toshiba Corp Video conference system
JPH0744750B2 (en) * 1987-03-20 1995-05-15 松下電器産業株式会社 Microphone unit
JP2541621B2 (en) * 1988-04-20 1996-10-09 株式会社プリモ Directional microphone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8638955B2 (en) 2006-11-22 2014-01-28 Funai Electric Advanced Applied Technology Research Institute Inc. Voice input device, method of producing the same, and information processing system
US8180082B2 (en) 2007-04-04 2012-05-15 Funai Electric Advanced Applied Technology Research Institute Inc. Microphone unit, close-talking voice input device, information processing system, and method of manufacturing microphone unit

Also Published As

Publication number Publication date
CA2032080C (en) 1996-07-23
JPH04217199A (en) 1992-08-07
JP2664005B2 (en) 1997-10-15
KR920000202A (en) 1992-01-10
KR0158893B1 (en) 1998-12-01

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry