FR2552291B1 - Transducteur acoustique directionnel - Google Patents

Transducteur acoustique directionnel

Info

Publication number
FR2552291B1
FR2552291B1 FR8414190A FR8414190A FR2552291B1 FR 2552291 B1 FR2552291 B1 FR 2552291B1 FR 8414190 A FR8414190 A FR 8414190A FR 8414190 A FR8414190 A FR 8414190A FR 2552291 B1 FR2552291 B1 FR 2552291B1
Authority
FR
France
Prior art keywords
acoustic transducer
directional acoustic
directional
transducer
acoustic
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
Application number
FR8414190A
Other languages
English (en)
Other versions
FR2552291A1 (fr
Inventor
James Loton Flanagan
Robert Alfred Kubli
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 FR2552291A1 publication Critical patent/FR2552291A1/fr
Application granted granted Critical
Publication of FR2552291B1 publication Critical patent/FR2552291B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H04R1/342—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 for microphones

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)
FR8414190A 1983-09-21 1984-09-17 Transducteur acoustique directionnel Expired FR2552291B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/534,204 US4555598A (en) 1983-09-21 1983-09-21 Teleconferencing acoustic transducer

Publications (2)

Publication Number Publication Date
FR2552291A1 FR2552291A1 (fr) 1985-03-22
FR2552291B1 true FR2552291B1 (fr) 1987-06-26

Family

ID=24129110

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8414190A Expired FR2552291B1 (fr) 1983-09-21 1984-09-17 Transducteur acoustique directionnel

Country Status (3)

Country Link
US (1) US4555598A (fr)
FR (1) FR2552291B1 (fr)
GB (1) GB2146870B (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK163400C (da) * 1989-05-29 1992-07-13 Brueel & Kjaer As Sondemikrofon
US5137110A (en) * 1990-08-30 1992-08-11 University Of Colorado Foundation, Inc. Highly directional sound projector and receiver apparatus
DE69120542T2 (de) * 1990-09-06 1996-11-28 British Telecomm " Rauschunterdrückender Handapparat "
US6084973A (en) * 1997-12-22 2000-07-04 Audio Technica U.S., Inc. Digital and analog directional microphone
SE9800850D0 (sv) * 1998-03-12 1998-03-12 Johan Ullman Riktad mikrofon
US6512450B1 (en) * 2000-01-20 2003-01-28 Mallory Sonalert, Products, Inc. Extra loud low frequency acoustical alarm assembly
US6788791B2 (en) * 2002-08-09 2004-09-07 Shure Incorporated Delay network microphones with harmonic nesting
DE102005004482B3 (de) * 2005-01-31 2006-08-17 Carcoustics Tech Center Gmbh Vorrichtung zur Messung der Schalldämmung oder Einfügungsdämmung eines Prüfobjekts, insbesondere Fahrgastzellenabschnittes eines Fahrzeuges
US8457614B2 (en) * 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
NO328582B1 (no) * 2006-12-29 2010-03-22 Tandberg Telecom As Mikrofon for lydkildesporing
RU2388175C2 (ru) * 2007-12-19 2010-04-27 Сергей Георгиевич Касоев Направленный микрофон helix
NO20076609A (no) * 2007-12-21 2009-03-16 Tandberg Telecom As Mikrofonanordning
NO332961B1 (no) 2008-12-23 2013-02-11 Cisco Systems Int Sarl Forhoyet toroidmikrofonapparat
US8453788B2 (en) * 2010-11-10 2013-06-04 International Business Machines Corporation Implementing dynamic noise elimination with acoustic frame design
RU2494570C1 (ru) * 2012-02-01 2013-09-27 Федеральное государственное образовательное бюджетное учреждение высшего профессионального образования Московский технический университет связи и информатики (ФГОБУ ВПО МТУСИ) Способ остронаправленного приема звуковых волн
US20140270310A1 (en) * 2013-03-12 2014-09-18 Cisco Technology, Inc. Acoustic waveguide for conference phone realtime communications
JP6458278B2 (ja) * 2015-05-26 2019-01-30 株式会社オーディオテクニカ マイクロホン

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2085130A (en) * 1936-06-18 1937-06-29 Bell Telephone Labor Inc Acoustic device
US2228886A (en) * 1938-10-31 1941-01-14 Rca Corp Electroacoustical apparatus
US2299342A (en) * 1939-11-30 1942-10-20 Rca Corp Electroacoustical apparatus
US2262146A (en) * 1940-01-31 1941-11-11 Rca Corp Sound translating apparatus
GB545790A (en) * 1940-01-31 1942-06-12 Marconi Wireless Telegraph Co Improvements in microphones
US2514344A (en) * 1944-07-10 1950-07-04 Stromberg Carlson Co Adjustable acoustic impedance
US2739659A (en) * 1950-09-05 1956-03-27 Fred B Daniels Acoustic device
US2789651A (en) * 1950-09-05 1957-04-23 Fred B Daniels Acoustic device
DE899679C (de) * 1951-08-30 1953-12-14 Siemens Ag Schallwandleranordnung mit gemeinsamem Wandlersystem
DE1073546B (de) * 1955-05-26 1960-01-21 Rudolf Gorike Wien Dr Richtmikrophon mit geringer Erschutterungs- und Windempfind lichkeit
US3095484A (en) * 1959-10-22 1963-06-25 Electro Voice Unidirectional microphone
US3573400A (en) * 1968-08-14 1971-04-06 Bell Telephone Labor Inc Directional microphone
US3715500A (en) * 1971-07-21 1973-02-06 Bell Telephone Labor Inc Unidirectional microphones
US3793489A (en) * 1972-05-22 1974-02-19 Rca Corp Ultradirectional microphone
AT358113B (de) * 1978-11-23 1980-08-25 Akg Akustische Kino Geraete Richtmikrophon nach dem interferenzprinzip
US4311874A (en) * 1979-12-17 1982-01-19 Bell Telephone Laboratories, Incorporated Teleconference microphone arrays

Also Published As

Publication number Publication date
US4555598A (en) 1985-11-26
FR2552291A1 (fr) 1985-03-22
GB2146870B (en) 1987-05-13
GB8423692D0 (en) 1984-10-24
GB2146870A (en) 1985-04-24

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Legal Events

Date Code Title Description
ST Notification of lapse