CA2032080A1 - Directional microphone assembly - Google Patents
Directional microphone assemblyInfo
- 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
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.
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.
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)
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)
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 |
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 |
EP2007167A3 (en) | 2007-06-21 | 2013-01-23 | Funai Electric Advanced Applied Technology Research Institute Inc. | Voice input-output device and communication device |
JP5250899B2 (en) * | 2007-10-16 | 2013-07-31 | 船井電機株式会社 | Mobile phone and microphone unit |
JP5257920B2 (en) * | 2007-10-16 | 2013-08-07 | 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 |
NO326892B1 (en) * | 2007-12-21 | 2009-03-16 | Tandberg Telecom As | microphone device |
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 |
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 |
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 |
JP5325555B2 (en) | 2008-12-05 | 2013-10-23 | 船井電機株式会社 | 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 |
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)
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 |
-
1990
- 1990-12-12 CA CA002032080A patent/CA2032080C/en not_active Expired - Lifetime
-
1991
- 1991-02-21 JP JP3047331A patent/JP2664005B2/en not_active Expired - Lifetime
- 1991-02-25 KR KR1019910002995A patent/KR0158893B1/en not_active IP Right Cessation
Cited By (2)
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 |
KR0158893B1 (en) | 1998-12-01 |
JPH04217199A (en) | 1992-08-07 |
KR920000202A (en) | 1992-01-10 |
JP2664005B2 (en) | 1997-10-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |