FR2385288A1 - Microphone a electret stabilise en temperature - Google Patents

Microphone a electret stabilise en temperature

Info

Publication number
FR2385288A1
FR2385288A1 FR7807902A FR7807902A FR2385288A1 FR 2385288 A1 FR2385288 A1 FR 2385288A1 FR 7807902 A FR7807902 A FR 7807902A FR 7807902 A FR7807902 A FR 7807902A FR 2385288 A1 FR2385288 A1 FR 2385288A1
Authority
FR
France
Prior art keywords
electret microphone
temperature stabilized
film
electrode
stabilized electret
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
Application number
FR7807902A
Other languages
English (en)
Other versions
FR2385288B1 (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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of FR2385288A1 publication Critical patent/FR2385288A1/fr
Application granted granted Critical
Publication of FR2385288B1 publication Critical patent/FR2385288B1/fr
Granted 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
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

Microphone à électret stabilisé en température, comportant une pellicule de matière plastique métallisée 1 tendue sur une pellicule 2 de matière plastique polarisée et fixée sur une electrode 3. La surface de la pellicule 2 de matière plastique polarisée est inférieure à celle de l'électrode 3 et cette pellicule 2 est fixée concentriquement sur ladite électrode par intermédiaire de la pellicule 1 de matière plastique métallisée. Domaine d'application : microphones.
FR7807902A 1977-03-23 1978-03-17 Microphone a electret stabilise en temperature Granted FR2385288A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7703355A SE398588B (sv) 1977-03-23 1977-03-23 Temperaturstabil elektretmikrofon

Publications (2)

Publication Number Publication Date
FR2385288A1 true FR2385288A1 (fr) 1978-10-20
FR2385288B1 FR2385288B1 (fr) 1984-03-23

Family

ID=20330819

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7807902A Granted FR2385288A1 (fr) 1977-03-23 1978-03-17 Microphone a electret stabilise en temperature

Country Status (13)

Country Link
US (1) US4142073A (fr)
AU (1) AU516257B2 (fr)
CA (1) CA1084153A (fr)
CH (1) CH626765A5 (fr)
DE (1) DE2810813A1 (fr)
DK (1) DK142340B (fr)
ES (1) ES468174A1 (fr)
FR (1) FR2385288A1 (fr)
GB (1) GB1575874A (fr)
IT (1) IT1093606B (fr)
NL (1) NL7803009A (fr)
NO (1) NO140450C (fr)
SE (1) SE398588B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4331840A (en) * 1980-02-22 1982-05-25 Lectret S.A. Electret transducer with tapered acoustic chamber
US4418246A (en) * 1980-10-29 1983-11-29 Tibbetts Industries, Inc. Cell assembly for electret transducer
US5442595A (en) * 1994-04-22 1995-08-15 Xecutek Corporation Capacitance-type ultrasonic transducer
DE19703311A1 (de) * 1997-01-30 1998-08-06 Sennheiser Electronic Grenzflächenmikrofon
DE19715365C2 (de) * 1997-04-11 1999-03-25 Sennheiser Electronic Kondensatormikrofon
US6741709B2 (en) * 2000-12-20 2004-05-25 Shure Incorporated Condenser microphone assembly
US7062058B2 (en) * 2001-04-18 2006-06-13 Sonion Nederland B.V. Cylindrical microphone having an electret assembly in the end cover
JP4181580B2 (ja) 2003-11-20 2008-11-19 松下電器産業株式会社 エレクトレット及びエレクトレットコンデンサー
WO2005086534A1 (fr) * 2004-03-03 2005-09-15 Matsushita Electric Industrial Co., Ltd. Unité microphone à condensateur électrète
EP1722595A4 (fr) 2004-03-05 2010-07-28 Panasonic Corp Microphone a electret
CN102804807B (zh) 2009-06-29 2015-11-25 诺基亚公司 电子设备、电子装置、移动终端装置以及用于处理电子信号的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2162194A1 (fr) * 1971-12-02 1973-07-13 Ericsson Telefon Ab L M
USRE28420E (en) * 1967-05-15 1975-05-13 Blbctret acoustic transducer
FR2282195A1 (fr) * 1974-08-15 1976-03-12 Ericsson Telefon Ab L M Procede de fabrication d'un microphone a electret
US4070741A (en) * 1976-09-27 1978-01-31 Genrad Inc. Method of making an electret acoustic transducer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328653A (en) * 1966-09-22 1967-06-27 Budd Co Thin film pressure transducer
US3821490A (en) * 1970-10-09 1974-06-28 Chester C Pond Electroacoustic transducer especially electrostatic speakers and systems
US4063050A (en) * 1976-12-30 1977-12-13 Industrial Research Products, Inc. Acoustic transducer with improved electret assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE28420E (en) * 1967-05-15 1975-05-13 Blbctret acoustic transducer
FR2162194A1 (fr) * 1971-12-02 1973-07-13 Ericsson Telefon Ab L M
FR2282195A1 (fr) * 1974-08-15 1976-03-12 Ericsson Telefon Ab L M Procede de fabrication d'un microphone a electret
US4070741A (en) * 1976-09-27 1978-01-31 Genrad Inc. Method of making an electret acoustic transducer

Also Published As

Publication number Publication date
FR2385288B1 (fr) 1984-03-23
NL7803009A (nl) 1978-09-26
CH626765A5 (fr) 1981-11-30
IT1093606B (it) 1985-07-19
US4142073A (en) 1979-02-27
CA1084153A (fr) 1980-08-19
SE398588B (sv) 1977-12-27
AU516257B2 (en) 1981-05-28
NO781052L (no) 1978-09-26
AU3425478A (en) 1979-09-20
IT7821534A0 (it) 1978-03-23
DK142340C (fr) 1981-03-23
DK142340B (da) 1980-10-13
DE2810813A1 (de) 1978-09-28
NO140450C (no) 1979-08-29
DK128378A (fr) 1978-09-24
GB1575874A (en) 1980-10-01
ES468174A1 (es) 1979-01-01
NO140450B (no) 1979-05-21

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Legal Events

Date Code Title Description
ST Notification of lapse