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ES468174A1 - Microfono de electreto perfeccionado, termoestable - Google Patents

Microfono de electreto perfeccionado, termoestable

Info

Publication number
ES468174A1
ES468174A1 ES468174A ES468174A ES468174A1 ES 468174 A1 ES468174 A1 ES 468174A1 ES 468174 A ES468174 A ES 468174A ES 468174 A ES468174 A ES 468174A ES 468174 A1 ES468174 A1 ES 468174A1
Authority
ES
Spain
Prior art keywords
electret
temperature
embossed
stable
plastic film
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
ES468174A
Other languages
English (en)
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 ES468174A1 publication Critical patent/ES468174A1/es
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
    • 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

Micrófono de electrodo perfeccionado, termo estable con una película de plástico metalizada estirada sobre una película de plástico de polarizada y fijada a un electrodo fijo subyacente, estando la película de plástico polarizada en al menos un lado realzada con un dibujo en relieve, caracterizado porque la película de plástico polarizada tiene un área menor que el electrodo fijo subyacente y está concéntricamente fijada a éste por la película de plástico metalizada.
ES468174A 1977-03-23 1978-03-22 Microfono de electreto perfeccionado, termoestable Expired ES468174A1 (es)

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
ES468174A1 true ES468174A1 (es) 1979-01-01

Family

ID=20330819

Family Applications (1)

Application Number Title Priority Date Filing Date
ES468174A Expired ES468174A1 (es) 1977-03-23 1978-03-22 Microfono de electreto perfeccionado, termoestable

Country Status (13)

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

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
WO2005050680A1 (ja) 2003-11-20 2005-06-02 Matsushita Electric Industrial Co., Ltd. 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
WO2011001195A1 (en) 2009-06-29 2011-01-06 Nokia Corporation Temperature compensated microphone

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 (es) * 1971-12-02 1973-12-10 Ericsson Telefon Ab L M
SE382297B (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
CH626765A5 (es) 1981-11-30
AU3425478A (en) 1979-09-20
NL7803009A (nl) 1978-09-26
NO781052L (no) 1978-09-26
US4142073A (en) 1979-02-27
IT7821534A0 (it) 1978-03-23
AU516257B2 (en) 1981-05-28
DK142340C (es) 1981-03-23
DK142340B (da) 1980-10-13
DE2810813A1 (de) 1978-09-28
DK128378A (es) 1978-09-24
IT1093606B (it) 1985-07-19
NO140450B (no) 1979-05-21
GB1575874A (en) 1980-10-01
FR2385288A1 (fr) 1978-10-20
FR2385288B1 (es) 1984-03-23
SE398588B (sv) 1977-12-27
CA1084153A (en) 1980-08-19
NO140450C (no) 1979-08-29

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