DK147670C - PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH AN EXACTLY DETERMINED AIR SPACE - Google Patents

PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH AN EXACTLY DETERMINED AIR SPACE

Info

Publication number
DK147670C
DK147670C DK368875A DK368875A DK147670C DK 147670 C DK147670 C DK 147670C DK 368875 A DK368875 A DK 368875A DK 368875 A DK368875 A DK 368875A DK 147670 C DK147670 C DK 147670C
Authority
DK
Denmark
Prior art keywords
procedure
manufacturing
air space
determined air
exactly determined
Prior art date
Application number
DK368875A
Other languages
Danish (da)
Other versions
DK147670B (en
DK368875A (en
Inventor
Nils Aake Martin Andersson
Rolf Bertil Goeran Joensson
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 DK368875A publication Critical patent/DK368875A/en
Publication of DK147670B publication Critical patent/DK147670B/en
Application granted granted Critical
Publication of DK147670C publication Critical patent/DK147670C/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)
DK368875A 1974-08-15 1975-08-14 PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH AN EXACTLY DETERMINED AIR SPACE DK147670C (en)

Applications Claiming Priority (2)

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.
SE7410408 1974-08-15

Publications (3)

Publication Number Publication Date
DK368875A DK368875A (en) 1976-02-16
DK147670B DK147670B (en) 1984-11-05
DK147670C true DK147670C (en) 1985-05-20

Family

ID=20321900

Family Applications (1)

Application Number Title Priority Date Filing Date
DK368875A DK147670C (en) 1974-08-15 1975-08-14 PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH AN EXACTLY DETERMINED AIR SPACE

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
DE2532980C3 (en) 1985-07-11
SE382297B (en) 1976-01-19
FI752120A (en) 1976-02-16
DK147670B (en) 1984-11-05
DK368875A (en) 1976-02-16
NL7509703A (en) 1976-02-17
FI57680B (en) 1980-05-30
ES440246A1 (en) 1977-03-01
DE2532980A1 (en) 1976-03-04
IT1042081B (en) 1980-01-30
NO136387B (en) 1977-05-16
NO752839L (en) 1976-02-17
NO136387C (en) 1977-08-31
GB1510833A (en) 1978-05-17
FR2282195B1 (en) 1979-05-11
CH589994A5 (en) 1977-07-29
FR2282195A1 (en) 1976-03-12
DE2532980B2 (en) 1976-08-05
FI57680C (en) 1980-09-10
SE7410408L (en) 1976-01-19

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Legal Events

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