CH589994A5 - - Google Patents

Info

Publication number
CH589994A5
CH589994A5 CH1057375A CH1057375A CH589994A5 CH 589994 A5 CH589994 A5 CH 589994A5 CH 1057375 A CH1057375 A CH 1057375A CH 1057375 A CH1057375 A CH 1057375A CH 589994 A5 CH589994 A5 CH 589994A5
Authority
CH
Switzerland
Application number
CH1057375A
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 CH589994A5 publication Critical patent/CH589994A5/xx

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)
CH1057375A 1974-08-15 1975-08-14 CH589994A5 (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 (1)

Publication Number Publication Date
CH589994A5 true CH589994A5 (en) 1977-07-29

Family

ID=20321900

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1057375A CH589994A5 (en) 1974-08-15 1975-08-14

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
GB1510833A (en) 1978-05-17
NO752839L (en) 1976-02-17
DK147670C (en) 1985-05-20
FI57680B (en) 1980-05-30
DE2532980A1 (en) 1976-03-04
NO136387B (en) 1977-05-16
DE2532980C3 (en) 1985-07-11
FR2282195A1 (en) 1976-03-12
SE382297B (en) 1976-01-19
NL7509703A (en) 1976-02-17
FR2282195B1 (en) 1979-05-11
DE2532980B2 (en) 1976-08-05
FI57680C (en) 1980-09-10
SE7410408L (en) 1976-01-19
FI752120A (en) 1976-02-16
IT1042081B (en) 1980-01-30
DK147670B (en) 1984-11-05
DK368875A (en) 1976-02-16
ES440246A1 (en) 1977-03-01
NO136387C (en) 1977-08-31

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Legal Events

Date Code Title Description
PL Patent ceased