GB1510833A - Process for manufacturing an electret microphone - Google Patents

Process for manufacturing an electret microphone

Info

Publication number
GB1510833A
GB1510833A GB33607/75A GB3360775A GB1510833A GB 1510833 A GB1510833 A GB 1510833A GB 33607/75 A GB33607/75 A GB 33607/75A GB 3360775 A GB3360775 A GB 3360775A GB 1510833 A GB1510833 A GB 1510833A
Authority
GB
United Kingdom
Prior art keywords
layer
electret
aug
manufacturing
electret microphone
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
GB33607/75A
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 GB1510833A publication Critical patent/GB1510833A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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)
GB33607/75A 1974-08-15 1975-08-12 Process for manufacturing an electret microphone Expired GB1510833A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7410408A SE382297B (sv) 1974-08-15 1974-08-15 Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap.

Publications (1)

Publication Number Publication Date
GB1510833A true GB1510833A (en) 1978-05-17

Family

ID=20321900

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33607/75A Expired GB1510833A (en) 1974-08-15 1975-08-12 Process for manufacturing an electret microphone

Country Status (11)

Country Link
CH (1) CH589994A5 (cg-RX-API-DMAC7.html)
DE (1) DE2532980C3 (cg-RX-API-DMAC7.html)
DK (1) DK147670C (cg-RX-API-DMAC7.html)
ES (1) ES440246A1 (cg-RX-API-DMAC7.html)
FI (1) FI57680C (cg-RX-API-DMAC7.html)
FR (1) FR2282195A1 (cg-RX-API-DMAC7.html)
GB (1) GB1510833A (cg-RX-API-DMAC7.html)
IT (1) IT1042081B (cg-RX-API-DMAC7.html)
NL (1) NL7509703A (cg-RX-API-DMAC7.html)
NO (1) NO136387C (cg-RX-API-DMAC7.html)
SE (1) SE382297B (cg-RX-API-DMAC7.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365283A (en) 1980-10-16 1982-12-21 Pennwalt Corporation Corona discharge poling process
GB2136207A (en) * 1983-03-07 1984-09-12 Harold Wilson Meredith Pook Manufacture of electrets

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE398588B (sv) * 1977-03-23 1977-12-27 Ericsson Telefon Ab L M Temperaturstabil elektretmikrofon
GB2079055B (en) * 1980-06-30 1985-02-20 Tokyo Shibaura Electric Co Electret device
US4418246A (en) 1980-10-29 1983-11-29 Tibbetts Industries, Inc. Cell assembly for electret transducer
DE3927254A1 (de) * 1989-08-18 1991-02-21 Reifenhaeuser Masch Verfahren und spinnduesenaggregat fuer die herstellung von kunststoff-faeden und/oder kunststoff-fasern im zuge der herstellung von einem spinnvlies aus thermoplastischem kunststoff

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA832651A (en) * 1970-01-20 Thermo Electron Corporation Electroacoustic transducers and method of making the same
DE844306C (de) * 1948-10-02 1952-07-17 Siemens Ag Kondensatormikrophon mit sehr kleinem Abstand zwischen Membran und Gegenflaeche
FR1324076A (fr) * 1962-05-30 1963-04-12 Accumulatoren Fabrik Ag Accumulateur dont l'énergie électrique est accumulée dans un diélectrique et procédé pour sa fabrication
US3373251A (en) * 1965-02-23 1968-03-12 Shure Bros Electrostatic transducer
NL146969B (nl) * 1969-11-12 1975-08-15 Tno Verbetering van werkwijze voor het formeren van een eenzijdig gemetalliseerde elektreetfoelie.
JPS5115599B1 (cg-RX-API-DMAC7.html) * 1971-07-28 1976-05-18
SE362571B (cg-RX-API-DMAC7.html) * 1971-12-02 1973-12-10 Ericsson Telefon Ab L M
NL7210088A (cg-RX-API-DMAC7.html) * 1972-07-21 1974-01-23

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365283A (en) 1980-10-16 1982-12-21 Pennwalt Corporation Corona discharge poling process
GB2136207A (en) * 1983-03-07 1984-09-12 Harold Wilson Meredith Pook Manufacture of electrets

Also Published As

Publication number Publication date
IT1042081B (it) 1980-01-30
FR2282195B1 (cg-RX-API-DMAC7.html) 1979-05-11
NO136387C (no) 1977-08-31
FI57680B (fi) 1980-05-30
NO136387B (cg-RX-API-DMAC7.html) 1977-05-16
DK147670C (da) 1985-05-20
DE2532980C3 (de) 1985-07-11
FI752120A7 (cg-RX-API-DMAC7.html) 1976-02-16
ES440246A1 (es) 1977-03-01
FI57680C (fi) 1980-09-10
DE2532980A1 (de) 1976-03-04
SE7410408L (sv) 1976-01-19
DE2532980B2 (de) 1976-08-05
NO752839L (cg-RX-API-DMAC7.html) 1976-02-17
DK368875A (da) 1976-02-16
CH589994A5 (cg-RX-API-DMAC7.html) 1977-07-29
NL7509703A (nl) 1976-02-17
DK147670B (da) 1984-11-05
FR2282195A1 (fr) 1976-03-12
SE382297B (sv) 1976-01-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee