CH626765A5 - - Google Patents

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Publication number
CH626765A5
CH626765A5 CH305178A CH305178A CH626765A5 CH 626765 A5 CH626765 A5 CH 626765A5 CH 305178 A CH305178 A CH 305178A CH 305178 A CH305178 A CH 305178A CH 626765 A5 CH626765 A5 CH 626765A5
Authority
CH
Switzerland
Prior art keywords
plastic film
polarized
microphone
electret
electret microphone
Prior art date
Application number
CH305178A
Other languages
German (de)
English (en)
Inventor
Nils-Erik Agneus
Hans-Eric Mansson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of CH626765A5 publication Critical patent/CH626765A5/de

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)
CH305178A 1977-03-23 1978-03-21 CH626765A5 (ko)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
CH626765A5 true CH626765A5 (ko) 1981-11-30

Family

ID=20330819

Family Applications (1)

Application Number Title Priority Date Filing Date
CH305178A CH626765A5 (ko) 1977-03-23 1978-03-21

Country Status (13)

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

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 (ja) * 2004-03-03 2005-09-15 Matsushita Electric Industrial Co., Ltd. エレクトレットコンデンサーマイクロフォンユニット
KR20060129041A (ko) 2004-03-05 2006-12-14 마츠시타 덴끼 산교 가부시키가이샤 일렉트릿 컨덴서
KR20120034763A (ko) 2009-06-29 2012-04-12 노키아 코포레이션 온도 보상 장치, 방법, 마이크로폰, 전자 장치 및 이동 단말 장치

Family Cites Families (7)

* 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
USRE28420E (en) * 1967-05-15 1975-05-13 Blbctret acoustic transducer
US3821490A (en) * 1970-10-09 1974-06-28 Chester C Pond Electroacoustic transducer especially electrostatic speakers and systems
SE362571B (ko) * 1971-12-02 1973-12-10 Ericsson Telefon Ab L M
SE7410408L (sv) * 1974-08-15 1976-01-19 Ericsson Telefon Ab L M Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap.
US4070741A (en) * 1976-09-27 1978-01-31 Genrad Inc. Method of making an electret acoustic transducer
US4063050A (en) * 1976-12-30 1977-12-13 Industrial Research Products, Inc. Acoustic transducer with improved electret assembly

Also Published As

Publication number Publication date
ES468174A1 (es) 1979-01-01
DK128378A (ko) 1978-09-24
IT7821534A0 (it) 1978-03-23
IT1093606B (it) 1985-07-19
FR2385288B1 (ko) 1984-03-23
AU3425478A (en) 1979-09-20
NO781052L (no) 1978-09-26
NO140450B (no) 1979-05-21
FR2385288A1 (fr) 1978-10-20
GB1575874A (en) 1980-10-01
CA1084153A (en) 1980-08-19
DK142340B (da) 1980-10-13
US4142073A (en) 1979-02-27
DK142340C (ko) 1981-03-23
AU516257B2 (en) 1981-05-28
NL7803009A (nl) 1978-09-26
NO140450C (no) 1979-08-29
DE2810813A1 (de) 1978-09-28
SE398588B (sv) 1977-12-27

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Legal Events

Date Code Title Description
PL Patent ceased