BR7208381D0 - Microfone eletrete - Google Patents

Microfone eletrete

Info

Publication number
BR7208381D0
BR7208381D0 BR008381/72A BR838172A BR7208381D0 BR 7208381 D0 BR7208381 D0 BR 7208381D0 BR 008381/72 A BR008381/72 A BR 008381/72A BR 838172 A BR838172 A BR 838172A BR 7208381 D0 BR7208381 D0 BR 7208381D0
Authority
BR
Brazil
Prior art keywords
eletrete
microphone
eletrete microphone
Prior art date
Application number
BR008381/72A
Other languages
English (en)
Inventor
J Hedman
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 BR7208381D0 publication Critical patent/BR7208381D0/pt

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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006—Interconnection of transducer parts
    • 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
    • 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
    • Y10T29/49005—Acoustic transducer
    • 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
BR008381/72A 1971-12-02 1972-11-29 Microfone eletrete BR7208381D0 (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15456/71A SE362571B (pt) 1971-12-02 1971-12-02

Publications (1)

Publication Number Publication Date
BR7208381D0 true BR7208381D0 (pt) 1973-08-30

Family

ID=20300673

Family Applications (1)

Application Number Title Priority Date Filing Date
BR008381/72A BR7208381D0 (pt) 1971-12-02 1972-11-29 Microfone eletrete

Country Status (16)

Country Link
US (1) US3812575A (pt)
JP (1) JPS5816000B2 (pt)
AU (1) AU467222B2 (pt)
BR (1) BR7208381D0 (pt)
CA (1) CA961974A (pt)
CH (1) CH555123A (pt)
DE (1) DE2257358C3 (pt)
DK (1) DK141150B (pt)
ES (1) ES409005A1 (pt)
FI (1) FI57679C (pt)
FR (1) FR2162194B1 (pt)
GB (1) GB1365257A (pt)
IT (1) IT971396B (pt)
NL (1) NL7216115A (pt)
NO (1) NO132015C (pt)
SE (1) SE362571B (pt)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896274A (en) * 1973-10-04 1975-07-22 Thermo Electron Corp Electret earphone
SE7410408L (sv) * 1974-08-15 1976-01-19 Ericsson Telefon Ab L M Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap.
JPS5636233Y2 (pt) * 1974-12-27 1981-08-26
US4070741A (en) * 1976-09-27 1978-01-31 Genrad Inc. Method of making an electret acoustic transducer
JPS53100228U (pt) * 1976-12-27 1978-08-14
SE398588B (sv) * 1977-03-23 1977-12-27 Ericsson Telefon Ab L M Temperaturstabil elektretmikrofon
JPS5754399Y2 (pt) * 1978-02-20 1982-11-25
GB2079053B (en) * 1980-06-30 1984-03-28 Tokyo Shibaura Electric Co Electret device
GB2079056B (en) * 1980-06-30 1985-04-17 Tokyo Shibaura Electric Co Electret device
US4429190A (en) * 1981-11-20 1984-01-31 Bell Telephone Laboratories, Incorporated Continuous strip electret transducer array
DE8531503U1 (pt) * 1985-11-07 1987-03-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
US4767973A (en) * 1987-07-06 1988-08-30 Sarcos Incorporated Systems and methods for sensing position and movement
JPH02149199A (ja) * 1988-11-30 1990-06-07 Matsushita Electric Ind Co Ltd エレクトレットコンデンサマイクロホン
US5408534A (en) * 1992-03-05 1995-04-18 Knowles Electronics, Inc. Electret microphone assembly, and method of manufacturer
US5647007A (en) * 1994-12-22 1997-07-08 Helen Of Troy Limited Optimized sound components for hair dryer stereo system
AT410498B (de) * 2001-02-20 2003-05-26 Akg Acoustics Gmbh Elektroakustische kapsel
TW200629954A (en) * 2004-11-02 2006-08-16 Hosiden Corp Condenser microphone and method for manufacturing substrate for the same
JP4245625B2 (ja) * 2006-09-29 2009-03-25 ホシデン株式会社 エレクトレットコンデンサマイクロホン
JP5172198B2 (ja) * 2007-04-27 2013-03-27 三洋電機株式会社 エレクトレット素子および静電動作装置
JP4944760B2 (ja) * 2007-12-27 2012-06-06 ホシデン株式会社 エレクトレットコンデンサマイクロホン
TWI378733B (en) * 2008-10-27 2012-12-01 Htc Corp Method for manufacturing electret diaphragm
KR101276350B1 (ko) * 2011-07-04 2013-06-18 주식회사 비에스이 스프링 베이스를 이용한 접합형 콘덴서 마이크로폰

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118022A (en) * 1961-08-07 1964-01-14 Bell Telephone Labor Inc Electroacoustic transducer
FR1330592A (fr) * 1961-08-07 1963-06-21 Western Electric Co Transducteur électrostatique
FR1354631A (fr) * 1962-05-22 1964-03-06 Western Electric Co Transducteur électroacoustique
US3436492A (en) * 1966-01-17 1969-04-01 Northern Electric Co Field effect electroacoustic transducer
US3612778A (en) * 1967-05-15 1971-10-12 Thermo Electron Corp Electret acoustic transducer and method of making

Also Published As

Publication number Publication date
FR2162194A1 (pt) 1973-07-13
US3812575A (en) 1974-05-28
DE2257358B2 (de) 1976-01-15
DK141150C (pt) 1980-07-07
NO132015B (pt) 1975-05-26
FR2162194B1 (pt) 1976-06-04
FI57679B (fi) 1980-05-30
AU467222B2 (en) 1975-11-27
DE2257358A1 (de) 1973-06-14
DE2257358C3 (de) 1980-09-25
SE362571B (pt) 1973-12-10
CH555123A (de) 1974-10-15
IT971396B (it) 1974-04-30
NO132015C (pt) 1975-09-03
DK141150B (da) 1980-01-21
NL7216115A (pt) 1973-06-05
FI57679C (fi) 1980-09-10
JPS4864917A (pt) 1973-09-07
CA961974A (en) 1975-01-28
AU4917672A (en) 1974-05-23
JPS5816000B2 (ja) 1983-03-29
ES409005A1 (es) 1975-10-16
GB1365257A (en) 1974-08-29

Similar Documents

Publication Publication Date Title
SE418572B (sv) Oronpropp
SE377990C (sv) Hogtalande telefonapparat
CH528198A (de) Hörgerät
AT333623B (de) Sportschuh
BE780107A (fr) Garde-temps
AT335885B (de) Sportschuh
BE777856A (fr) Cryocable
BR7208381D0 (pt) Microfone eletrete
DK135896B (da) ??
AT329438B (de) Lufthebeforderer
BE780405A (fr) Fotografisch materiaal
AT325420B (de) Koronagenerator
BE779073A (fr) Bitumineuze emulsies
AT342779B (de) Zahnpasten
BE778428A (fr) Vatenklem
BE779891A (fr) Balai laveur-essoreur
AT325692B (de) Elektrodynamisches mikrophon
BE780088A (fr) Cirkelhooier
BE773645A (fr) Ladenkast
BE777205R (fr) Braguette
BE778507A (fr) Beta-alcoylthio-aldehydes
BE779012A (fr) Supraconducteurs
BE780395A (fr) Doorzichtige plaat
BE780015A (fr) Ketel
AT308862B (de) Hörgerät