SE7410408L - PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH A CAREFULLY DETERMINED AIR GAP. - Google Patents

PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH A CAREFULLY DETERMINED AIR GAP.

Info

Publication number
SE7410408L
SE7410408L SE7410408A SE7410408A SE7410408L SE 7410408 L SE7410408 L SE 7410408L SE 7410408 A SE7410408 A SE 7410408A SE 7410408 A SE7410408 A SE 7410408A SE 7410408 L SE7410408 L SE 7410408L
Authority
SE
Sweden
Prior art keywords
layer
electret
procedure
manufacturing
air gap
Prior art date
Application number
SE7410408A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE382297B (en
Inventor
N A M Andersson
R B G Jonsson
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
Priority to SE7410408A priority Critical patent/SE382297B/en
Priority to DE2532980A priority patent/DE2532980C3/en
Priority to FI752120A priority patent/FI57680C/en
Priority to GB33607/75A priority patent/GB1510833A/en
Priority to IT26359/75A priority patent/IT1042081B/en
Priority to NO752839A priority patent/NO136387C/en
Priority to DK368875A priority patent/DK147670C/en
Priority to FR7525443A priority patent/FR2282195A1/en
Priority to CH1057375A priority patent/CH589994A5/xx
Priority to ES440246A priority patent/ES440246A1/en
Priority to NL7509703A priority patent/NL7509703A/en
Publication of SE7410408L publication Critical patent/SE7410408L/en
Publication of SE382297B publication Critical patent/SE382297B/en

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
    • 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)

Abstract

1510833 Electret microphones TELEFONAKTIEBOLAGET L M ERICSSON 12 Aug 1975 [15 Aug 1974] 33607/75 Heading H4J [Also in Division H1] In an electret microphone wherein the movable electrode comprises PTFE electret layer 3 and polyester layer 2 bearing metallized layer 4, air gaps are provided between electret layer 3, fixed plate 1 and layer 2 by hot embossing a mesh pattern on each side of the electret layer before completion of polarization using a glass web.
SE7410408A 1974-08-15 1974-08-15 PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH A CAREFULLY DETERMINED AIR GAP. SE382297B (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
SE7410408A SE382297B (en) 1974-08-15 1974-08-15 PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH A CAREFULLY DETERMINED AIR GAP.
DE2532980A DE2532980C3 (en) 1974-08-15 1975-07-23 Process for the production of an electret microphone with a precisely determined air gap
FI752120A FI57680C (en) 1974-08-15 1975-07-24 FREQUENCY REQUIREMENT FOR ELECTRIC MICROPHONE WITH ETC GRAPHIC BUTTON
GB33607/75A GB1510833A (en) 1974-08-15 1975-08-12 Process for manufacturing an electret microphone
IT26359/75A IT1042081B (en) 1974-08-15 1975-08-14 ELECTRONIC MICROPHONE MANUFACTURING PROCEDURE
NO752839A NO136387C (en) 1974-08-15 1975-08-14 PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH AN EXACTLY DETERMINED AIR GAP
DK368875A DK147670C (en) 1974-08-15 1975-08-14 PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH AN EXACTLY DETERMINED AIR SPACE
FR7525443A FR2282195A1 (en) 1974-08-15 1975-08-14 METHOD OF MANUFACTURING AN ELECTRET MICROPHONE
CH1057375A CH589994A5 (en) 1974-08-15 1975-08-14
ES440246A ES440246A1 (en) 1974-08-15 1975-08-14 Process for manufacturing an electret microphone
NL7509703A NL7509703A (en) 1974-08-15 1975-08-14 PROCESS OF MANUFACTURING A MICROPHONE OF THE TYPE SPECIFIED AS ELECTRICAL, AND A MICROPHONE MANUFACTURED IN ACCORDANCE WITH SUCH PROCESS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7410408A SE382297B (en) 1974-08-15 1974-08-15 PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH A CAREFULLY DETERMINED AIR GAP.

Publications (2)

Publication Number Publication Date
SE7410408L true SE7410408L (en) 1976-01-19
SE382297B SE382297B (en) 1976-01-19

Family

ID=20321900

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7410408A SE382297B (en) 1974-08-15 1974-08-15 PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH A CAREFULLY DETERMINED AIR GAP.

Country Status (11)

Country Link
CH (1) CH589994A5 (en)
DE (1) DE2532980C3 (en)
DK (1) DK147670C (en)
ES (1) ES440246A1 (en)
FI (1) FI57680C (en)
FR (1) FR2282195A1 (en)
GB (1) GB1510833A (en)
IT (1) IT1042081B (en)
NL (1) NL7509703A (en)
NO (1) NO136387C (en)
SE (1) SE382297B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE398588B (en) * 1977-03-23 1977-12-27 Ericsson Telefon Ab L M TEMPERATURE STABLE ELECTRIC MICROPHONE
GB2079055B (en) * 1980-06-30 1985-02-20 Tokyo Shibaura Electric Co Electret device
GB2136207B (en) * 1983-03-07 1987-06-17 Harold Wilson Meredith Pook Manufacture of electrets
DE3927254A1 (en) * 1989-08-18 1991-02-21 Reifenhaeuser Masch METHOD AND SPINNING NOZZLE UNIT FOR THE PRODUCTION OF PLASTIC THREADS AND / OR PLASTIC FIBERS INTO THE PRODUCTION OF A SPINNING FLEECE FROM THERMOPLASTIC PLASTIC

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 (en) * 1948-10-02 1952-07-17 Siemens Ag Condenser microphone with a very small distance between membrane and counter surface
FR1324076A (en) * 1962-05-30 1963-04-12 Accumulatoren Fabrik Ag Accumulator, the electrical energy of which is stored in a dielectric and method for its manufacture
US3373251A (en) * 1965-02-23 1968-03-12 Shure Bros Electrostatic transducer
NL146969B (en) * 1969-11-12 1975-08-15 Tno IMPROVEMENT OF METHOD FOR FORMING A ONE-SIDED METALLIZED ELECTRICAL FOIL.
JPS5115599B1 (en) * 1971-07-28 1976-05-18
SE362571B (en) * 1971-12-02 1973-12-10 Ericsson Telefon Ab L M
NL7210088A (en) * 1972-07-21 1974-01-23

Also Published As

Publication number Publication date
NO752839L (en) 1976-02-17
ES440246A1 (en) 1977-03-01
GB1510833A (en) 1978-05-17
NO136387B (en) 1977-05-16
DK147670C (en) 1985-05-20
IT1042081B (en) 1980-01-30
DK147670B (en) 1984-11-05
CH589994A5 (en) 1977-07-29
FR2282195B1 (en) 1979-05-11
FI752120A (en) 1976-02-16
NL7509703A (en) 1976-02-17
DE2532980A1 (en) 1976-03-04
FI57680C (en) 1980-09-10
FR2282195A1 (en) 1976-03-12
NO136387C (en) 1977-08-31
FI57680B (en) 1980-05-30
DE2532980C3 (en) 1985-07-11
SE382297B (en) 1976-01-19
DK368875A (en) 1976-02-16
DE2532980B2 (en) 1976-08-05

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