FR2282195B1 - - Google Patents

Info

Publication number
FR2282195B1
FR2282195B1 FR7525443A FR7525443A FR2282195B1 FR 2282195 B1 FR2282195 B1 FR 2282195B1 FR 7525443 A FR7525443 A FR 7525443A FR 7525443 A FR7525443 A FR 7525443A FR 2282195 B1 FR2282195 B1 FR 2282195B1
Authority
FR
France
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
FR7525443A
Other languages
French (fr)
Other versions
FR2282195A1 (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 FR2282195A1 publication Critical patent/FR2282195A1/en
Application granted granted Critical
Publication of FR2282195B1 publication Critical patent/FR2282195B1/fr
Granted 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
    • 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)
FR7525443A 1974-08-15 1975-08-14 METHOD OF MANUFACTURING AN ELECTRET MICROPHONE Granted FR2282195A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7410408A SE7410408L (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
FR2282195A1 FR2282195A1 (en) 1976-03-12
FR2282195B1 true FR2282195B1 (en) 1979-05-11

Family

ID=20321900

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7525443A Granted FR2282195A1 (en) 1974-08-15 1975-08-14 METHOD OF MANUFACTURING AN ELECTRET MICROPHONE

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) SE7410408L (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
FR2282195A1 (en) 1976-03-12
GB1510833A (en) 1978-05-17
DE2532980A1 (en) 1976-03-04
DK147670C (en) 1985-05-20
DK147670B (en) 1984-11-05
NO136387B (en) 1977-05-16
FI752120A (en) 1976-02-16
ES440246A1 (en) 1977-03-01
SE382297B (en) 1976-01-19
NO136387C (en) 1977-08-31
SE7410408L (en) 1976-01-19
CH589994A5 (en) 1977-07-29
NO752839L (en) 1976-02-17
NL7509703A (en) 1976-02-17
DK368875A (en) 1976-02-16
DE2532980B2 (en) 1976-08-05
FI57680C (en) 1980-09-10
IT1042081B (en) 1980-01-30
FI57680B (en) 1980-05-30
DE2532980C3 (en) 1985-07-11

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Legal Events

Date Code Title Description
ST Notification of lapse