NL8204514A - Transducent van de als electreet aangeduide soort met een naar keuze gemetalliseerde achterplaat. - Google Patents

Transducent van de als electreet aangeduide soort met een naar keuze gemetalliseerde achterplaat. Download PDF

Info

Publication number
NL8204514A
NL8204514A NL8204514A NL8204514A NL8204514A NL 8204514 A NL8204514 A NL 8204514A NL 8204514 A NL8204514 A NL 8204514A NL 8204514 A NL8204514 A NL 8204514A NL 8204514 A NL8204514 A NL 8204514A
Authority
NL
Netherlands
Prior art keywords
electret
back plate
foil
polymer layer
transducer
Prior art date
Application number
NL8204514A
Other languages
English (en)
Dutch (nl)
Original Assignee
Western Electric Co
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 filed Critical Western Electric Co
Publication of NL8204514A publication Critical patent/NL8204514A/nl

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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)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Pressure Sensors (AREA)
NL8204514A 1981-11-20 1982-11-19 Transducent van de als electreet aangeduide soort met een naar keuze gemetalliseerde achterplaat. NL8204514A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32366981 1981-11-20
US06/323,669 US4429191A (en) 1981-11-20 1981-11-20 Electret transducer with variably charged electret foil

Publications (1)

Publication Number Publication Date
NL8204514A true NL8204514A (nl) 1983-06-16

Family

ID=23260213

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8204514A NL8204514A (nl) 1981-11-20 1982-11-19 Transducent van de als electreet aangeduide soort met een naar keuze gemetalliseerde achterplaat.

Country Status (7)

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

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
WO2003015469A1 (en) * 2001-08-06 2003-02-20 Measurement Specialties, Inc. Acoustic sensor using cured 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 (ja) * 1973-09-15 1975-03-17 Bowers And Wilkins Electronics
JPS5593180U (ja) * 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
DE3242561C2 (ja) 1993-08-26
FR2517159B1 (fr) 1985-10-25
SE8206385D0 (sv) 1982-11-10
SE8206385L (sv) 1983-05-21
CA1185694A (en) 1985-04-16
DE3242561A1 (de) 1983-06-23
FR2517159A1 (fr) 1983-05-27
JPS5896496A (ja) 1983-06-08
US4429191A (en) 1984-01-31
SE457924B (sv) 1989-02-06
JPH0648878B2 (ja) 1994-06-22

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Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BV The patent application has lapsed