FR2517159B1 - Transducteur a electret comportant une membrane a electret chargee de facon variable - Google Patents

Transducteur a electret comportant une membrane a electret chargee de facon variable

Info

Publication number
FR2517159B1
FR2517159B1 FR8219313A FR8219313A FR2517159B1 FR 2517159 B1 FR2517159 B1 FR 2517159B1 FR 8219313 A FR8219313 A FR 8219313A FR 8219313 A FR8219313 A FR 8219313A FR 2517159 B1 FR2517159 B1 FR 2517159B1
Authority
FR
France
Prior art keywords
electret
membrane
transducer
variable loaded
loaded
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
FR8219313A
Other languages
English (en)
Other versions
FR2517159A1 (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.)
AT&T Corp
Original Assignee
Western Electric 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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of FR2517159A1 publication Critical patent/FR2517159A1/fr
Application granted granted Critical
Publication of FR2517159B1 publication Critical patent/FR2517159B1/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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49226—Electret making

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Pressure Sensors (AREA)
FR8219313A 1981-11-20 1982-11-18 Transducteur a electret comportant une membrane a electret chargee de facon variable Expired FR2517159B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/323,669 US4429191A (en) 1981-11-20 1981-11-20 Electret transducer with variably charged electret foil

Publications (2)

Publication Number Publication Date
FR2517159A1 FR2517159A1 (fr) 1983-05-27
FR2517159B1 true FR2517159B1 (fr) 1985-10-25

Family

ID=23260213

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8219313A Expired FR2517159B1 (fr) 1981-11-20 1982-11-18 Transducteur a electret comportant une membrane a electret chargee de facon variable

Country Status (7)

Country Link
US (1) US4429191A (fr)
JP (1) JPH0648878B2 (fr)
CA (1) CA1185694A (fr)
DE (1) DE3242561A1 (fr)
FR (1) FR2517159B1 (fr)
NL (1) NL8204514A (fr)
SE (1) SE457924B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101543A (en) * 1990-07-02 1992-04-07 Gentex Corporation Method of making a variable capacitor microphone
US5388163A (en) * 1991-12-23 1995-02-07 At&T Corp. Electret transducer array and fabrication technique
US5473683A (en) * 1992-02-13 1995-12-05 Northern Telecom Limited Post assembly process for adjusting the gain of an electret microphone within a communications apparatus
US6937736B2 (en) * 2001-08-06 2005-08-30 Measurement Specialties, Inc. Acoustic sensor using curved piezoelectric film
JP6547272B2 (ja) * 2014-10-16 2019-07-24 ヤマハ株式会社 電気音響変換器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR874440A (fr) * 1940-02-12 1942-08-06 Atlas Werke Ag Appareil pour émissions ou réceptions dirigées d'énergie ondulatoire
US3372245A (en) * 1963-01-25 1968-03-05 Matsushita Electric Ind Co Ltd Electrostatic electro-acoustic transducer
US3588382A (en) * 1967-10-11 1971-06-28 Northern Electric Co Directional electret transducer
SE7411457L (fr) * 1973-09-15 1975-03-17 Bowers And Wilkins Electronics
JPS5593180U (fr) * 1978-12-19 1980-06-27
US4311874A (en) * 1979-12-17 1982-01-19 Bell Telephone Laboratories, Incorporated Teleconference microphone arrays

Also Published As

Publication number Publication date
NL8204514A (nl) 1983-06-16
CA1185694A (fr) 1985-04-16
DE3242561A1 (de) 1983-06-23
DE3242561C2 (fr) 1993-08-26
SE8206385L (sv) 1983-05-21
SE8206385D0 (sv) 1982-11-10
JPS5896496A (ja) 1983-06-08
US4429191A (en) 1984-01-31
FR2517159A1 (fr) 1983-05-27
JPH0648878B2 (ja) 1994-06-22
SE457924B (sv) 1989-02-06

Similar Documents

Publication Publication Date Title
DE3274945D1 (en) Electro-acoustic transducer with piezo-electric polymer
BR8407212A (pt) Transdutor de pressao
SG17883G (en) Diaphragms for electroacoustic transducers
IT8124818A0 (it) Trasduttore elettroacustico.
DK146770C (da) Kapacitiv transducer
NO834403L (no) Dialysesonde
GB2031691B (en) Electroacoustic transducer diaphragms
DE3269818D1 (en) Variable capacitance pressure transducer
BR8207904A (pt) Transdutor de pressao capacitivo de silicio-vidro-silicio
KR840005297A (ko) 전기 음향 변환기
FR2555741B1 (fr) Transducteur de pression a resonateur
JPS5758500A (en) Electret type transducer
DE3070552D1 (en) Variable capacitance pressure transducer assembly
GB2081052B (en) An electroacoustic transducer assembly
IT8119889A0 (it) Trasduttore acustico.
DE3377888D1 (en) Electro-acoustic transducer with diaphragm
FR2585127B2 (fr) Transducteur de pression a resonateur
FR2517157B1 (fr) Reseau acoustique a transducteur a electret
FR2517161B1 (fr) Transducteur a electret comportant une membrane a electret d'epaisseur variable
FR2517159B1 (fr) Transducteur a electret comportant une membrane a electret chargee de facon variable
FR2510336B1 (fr) Transducteur piezoelectrique
BR7905977A (pt) Conjunto de transdutor de pressao
FR2500706B1 (fr) Transducteur electrostatique-acoustique
AR229045A1 (es) Disposicion de transductor electroacustico
AR226002A1 (es) Disposicion de transductor electroacustico

Legal Events

Date Code Title Description
ST Notification of lapse