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 (fr
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/fr
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 Procede de fabrication d'un microphone a electret Granted FR2282195A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7410408A SE7410408L (sv) 1974-08-15 1974-08-15 Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap.

Publications (2)

Publication Number Publication Date
FR2282195A1 FR2282195A1 (fr) 1976-03-12
FR2282195B1 true FR2282195B1 (enrdf_load_stackoverflow) 1979-05-11

Family

ID=20321900

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7525443A Granted FR2282195A1 (fr) 1974-08-15 1975-08-14 Procede de fabrication d'un microphone a electret

Country Status (11)

Country Link
CH (1) CH589994A5 (enrdf_load_stackoverflow)
DE (1) DE2532980C3 (enrdf_load_stackoverflow)
DK (1) DK147670C (enrdf_load_stackoverflow)
ES (1) ES440246A1 (enrdf_load_stackoverflow)
FI (1) FI57680C (enrdf_load_stackoverflow)
FR (1) FR2282195A1 (enrdf_load_stackoverflow)
GB (1) GB1510833A (enrdf_load_stackoverflow)
IT (1) IT1042081B (enrdf_load_stackoverflow)
NL (1) NL7509703A (enrdf_load_stackoverflow)
NO (1) NO136387C (enrdf_load_stackoverflow)
SE (1) SE7410408L (enrdf_load_stackoverflow)

Families Citing this family (6)

* 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
US4365283A (en) 1980-10-16 1982-12-21 Pennwalt Corporation Corona discharge poling process
US4418246A (en) 1980-10-29 1983-11-29 Tibbetts Industries, Inc. Cell assembly for electret transducer
GB2136207B (en) * 1983-03-07 1987-06-17 Harold Wilson Meredith Pook Manufacture of electrets
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 (enrdf_load_stackoverflow) * 1971-07-28 1976-05-18
SE362571B (enrdf_load_stackoverflow) * 1971-12-02 1973-12-10 Ericsson Telefon Ab L M
NL7210088A (enrdf_load_stackoverflow) * 1972-07-21 1974-01-23

Also Published As

Publication number Publication date
FI752120A7 (enrdf_load_stackoverflow) 1976-02-16
FR2282195A1 (fr) 1976-03-12
GB1510833A (en) 1978-05-17
DK147670C (da) 1985-05-20
NO136387C (no) 1977-08-31
SE382297B (sv) 1976-01-19
DE2532980B2 (de) 1976-08-05
NO136387B (enrdf_load_stackoverflow) 1977-05-16
FI57680C (fi) 1980-09-10
SE7410408L (sv) 1976-01-19
NL7509703A (nl) 1976-02-17
NO752839L (enrdf_load_stackoverflow) 1976-02-17
DE2532980C3 (de) 1985-07-11
DK147670B (da) 1984-11-05
IT1042081B (it) 1980-01-30
FI57680B (fi) 1980-05-30
DE2532980A1 (de) 1976-03-04
CH589994A5 (enrdf_load_stackoverflow) 1977-07-29
DK368875A (da) 1976-02-16
ES440246A1 (es) 1977-03-01

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Legal Events

Date Code Title Description
ST Notification of lapse