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GB1387453A - Electrostatic electro-acoustic transducer - Google Patents

Electrostatic electro-acoustic transducer

Info

Publication number
GB1387453A
GB1387453A GB939772A GB939772A GB1387453A GB 1387453 A GB1387453 A GB 1387453A GB 939772 A GB939772 A GB 939772A GB 939772 A GB939772 A GB 939772A GB 1387453 A GB1387453 A GB 1387453A
Authority
GB
United Kingdom
Prior art keywords
electrodes
electret
conductive layer
layer
plastics
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
GB939772A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1387453A publication Critical patent/GB1387453A/en
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
    • H04R19/013—Electrostatic transducers characterised by the use of electrets for loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
GB939772A 1971-03-11 1972-02-29 Electrostatic electro-acoustic transducer Expired GB1387453A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1382871A JPS5632839B1 (fr) 1971-03-11 1971-03-11

Publications (1)

Publication Number Publication Date
GB1387453A true GB1387453A (en) 1975-03-19

Family

ID=11844119

Family Applications (1)

Application Number Title Priority Date Filing Date
GB939772A Expired GB1387453A (en) 1971-03-11 1972-02-29 Electrostatic electro-acoustic transducer

Country Status (6)

Country Link
US (1) US3833770A (fr)
JP (1) JPS5632839B1 (fr)
CA (1) CA947856A (fr)
DE (1) DE2211729A1 (fr)
FR (1) FR2186799B1 (fr)
GB (1) GB1387453A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010036390A1 (fr) * 2008-09-26 2010-04-01 Sony Ericsson Mobile Communications Ab Dispositif de communication portable pourvu d'un clavier haptique entraine electroluminescent

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7313455A (nl) * 1973-10-01 1975-04-03 Philips Nv Mikrofoon met elektrostatische capsule.
US3921167A (en) * 1974-06-14 1975-11-18 Ibm Capacitive circuitboard
US4331840A (en) * 1980-02-22 1982-05-25 Lectret S.A. Electret transducer with tapered acoustic chamber
NL8004351A (nl) * 1980-07-30 1982-03-01 Philips Nv Elektreetomzetter.
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
US8559660B2 (en) * 2007-07-12 2013-10-15 Industrial Technology Research Institute Electrostatic electroacoustic transducers
TWI343756B (en) * 2009-08-10 2011-06-11 Ind Tech Res Inst Flat loudspeaker structure
US8184833B2 (en) * 2007-12-14 2012-05-22 Sony Ericsson Mobile Communications Ab Electrostatic speaker arrangement for a mobile device
WO2019218697A1 (fr) * 2018-05-14 2019-11-21 Dong Yaobin Générateur électronique, dispositif de génération de charge nette et haut-parleur électrostatique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3008013A (en) * 1954-07-20 1961-11-07 Ferranti Ltd Electrostatic loudspeakers
US3160715A (en) * 1960-11-15 1964-12-08 Gussing Nils Torsten Alson Electrostatic loudspeakers
US3118022A (en) * 1961-08-07 1964-01-14 Bell Telephone Labor Inc Electroacoustic transducer
FR1354631A (fr) * 1962-05-22 1964-03-06 Western Electric Co Transducteur électroacoustique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010036390A1 (fr) * 2008-09-26 2010-04-01 Sony Ericsson Mobile Communications Ab Dispositif de communication portable pourvu d'un clavier haptique entraine electroluminescent

Also Published As

Publication number Publication date
DE2211729A1 (de) 1972-09-28
US3833770A (en) 1974-09-03
CA947856A (en) 1974-05-21
JPS5632839B1 (fr) 1981-07-30
FR2186799B1 (fr) 1975-03-07
FR2186799A1 (fr) 1974-01-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years