FR861267A - Electro-acoustic device - Google Patents

Electro-acoustic device

Info

Publication number
FR861267A
FR861267A FR861267DA FR861267A FR 861267 A FR861267 A FR 861267A FR 861267D A FR861267D A FR 861267DA FR 861267 A FR861267 A FR 861267A
Authority
FR
France
Prior art keywords
electro
acoustic device
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
Other languages
French (fr)
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Application granted granted Critical
Publication of FR861267A publication Critical patent/FR861267A/en
Expired 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
    • 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
    • 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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency 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
    • H04R1/345—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 loudspeakers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Exhaust Silencers (AREA)
  • Pipe Accessories (AREA)
FR861267D 1938-10-31 1939-10-30 Electro-acoustic device Expired FR861267A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US237960A US2228886A (en) 1938-10-31 1938-10-31 Electroacoustical apparatus

Publications (1)

Publication Number Publication Date
FR861267A true FR861267A (en) 1941-02-05

Family

ID=22895938

Family Applications (1)

Application Number Title Priority Date Filing Date
FR861267D Expired FR861267A (en) 1938-10-31 1939-10-30 Electro-acoustic device

Country Status (3)

Country Link
US (1) US2228886A (en)
FR (1) FR861267A (en)
GB (1) GB536066A (en)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463762A (en) * 1941-11-14 1949-03-08 Automatic Elect Lab Electroacoustical transducer
US2485405A (en) * 1944-04-21 1949-10-18 Stromberg Carlson Co Dipole microphone
DE960904C (en) * 1949-11-06 1957-05-02 Siemens Ag Device for sound receiver with two pressure chambers formed by a microphone and pipes connected to them
US2566094A (en) * 1950-06-22 1951-08-28 Rca Corp Line type pressure responsive microphone
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
US2718272A (en) * 1950-12-29 1955-09-20 Rca Corp Dynamic microphone
US2856022A (en) * 1954-08-06 1958-10-14 Electro Sonic Lab Inc Directional acoustic signal transducer
DE1014595B (en) * 1955-02-15 1957-08-29 Lab Wennebostel Directional microphone
DE1073546B (en) * 1955-05-26 1960-01-21 Rudolf Gorike Wien Dr Directional microphone with low vibration and wind sensitivity
US2927167A (en) * 1957-03-25 1960-03-01 Soundtronic Corp Of America Pick-up for musical instruments
US2928490A (en) * 1957-04-30 1960-03-15 Sennheiser Electronic Sound directing apparatus
AT228283B (en) * 1961-02-06 1963-07-10 Akg Akustische Kino Geraete Electroacoustic transducer built into a capsule with a transistor amplifier, particularly for handsets in telephone stations
US3286782A (en) * 1962-04-09 1966-11-22 United Res Inc Energy coupling device
US3715500A (en) * 1971-07-21 1973-02-06 Bell Telephone Labor Inc Unidirectional microphones
AT358113B (en) * 1978-11-23 1980-08-25 Akg Akustische Kino Geraete DIRECTIONAL MICROPHONE ACCORDING TO THE INTERFERENCE PRINCIPLE
US4421957A (en) * 1981-06-15 1983-12-20 Bell Telephone Laboratories, Incorporated End-fire microphone and loudspeaker structures
US4555598A (en) * 1983-09-21 1985-11-26 At&T Bell Laboratories Teleconferencing acoustic transducer
US4768614A (en) * 1986-11-28 1988-09-06 Case Eliot M Unidirectional enhancer for microphones
JP2945983B2 (en) * 1987-03-25 1999-09-06 久次 中村 Speaker device
DK163400C (en) * 1989-05-29 1992-07-13 Brueel & Kjaer As PROBE MICROPHONE
US5296656A (en) * 1990-06-01 1994-03-22 Gin Kon Jung Sound collecting and concentrating device for attaching to the back of multiple loudspeakers
US5025886A (en) * 1990-06-01 1991-06-25 Jung Gin K Multi-ported and multi-directional loudspeaker system
US5206465A (en) * 1990-06-01 1993-04-27 Gin Kon Jung Sound collecting and concentrating device for attaching to the back of a loudspeaker
US5734728A (en) * 1994-11-30 1998-03-31 Meissner; Juergen P. Portable sound speaker system and driving circuit therefor
DE19703311A1 (en) * 1997-01-30 1998-08-06 Sennheiser Electronic Interface microphone
DE19706074C1 (en) * 1997-02-17 1998-06-25 Sennheiser Electronic Directional microphone with symmetrical directional effect
US6091829A (en) * 1998-01-23 2000-07-18 Earthworks, Inc. Microphone apparatus
US6788791B2 (en) * 2002-08-09 2004-09-07 Shure Incorporated Delay network microphones with harmonic nesting
GB0410962D0 (en) * 2004-05-17 2004-06-16 Mordaunt Short Ltd Loudspeaker
US7813519B2 (en) * 2006-02-02 2010-10-12 General Motors Llc Microphone apparatus with increased directivity
US7801320B2 (en) * 2006-03-09 2010-09-21 Nokia Corporation Sound sponge for loudspeakers
US7986800B2 (en) * 2007-02-20 2011-07-26 Fortemedia, Inc. Device with acoustic guard
US7656749B2 (en) * 2007-09-04 2010-02-02 The United States Of America As Represented By The Secretary Of The Army Systems and methods for analyzing acoustic waves

Also Published As

Publication number Publication date
US2228886A (en) 1941-01-14
GB536066A (en) 1941-05-01

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