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ES440246A1 - Procedimiento para la fabricacion de un microfono de elec- treto con un espacio de aire exactamente determinado. - Google Patents

Procedimiento para la fabricacion de un microfono de elec- treto con un espacio de aire exactamente determinado.

Info

Publication number
ES440246A1
ES440246A1 ES440246A ES440246A ES440246A1 ES 440246 A1 ES440246 A1 ES 440246A1 ES 440246 A ES440246 A ES 440246A ES 440246 A ES440246 A ES 440246A ES 440246 A1 ES440246 A1 ES 440246A1
Authority
ES
Spain
Prior art keywords
manufacturing
plastic film
electret microphone
treatment operation
plastic
Prior art date
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
ES440246A
Other languages
English (en)
Spanish (es)
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 ES440246A1 publication Critical patent/ES440246A1/es
Expired 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)
ES440246A 1974-08-15 1975-08-14 Procedimiento para la fabricacion de un microfono de elec- treto con un espacio de aire exactamente determinado. Expired ES440246A1 (es)

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 (1)

Publication Number Publication Date
ES440246A1 true ES440246A1 (es) 1977-03-01

Family

ID=20321900

Family Applications (1)

Application Number Title Priority Date Filing Date
ES440246A Expired ES440246A1 (es) 1974-08-15 1975-08-14 Procedimiento para la fabricacion de un microfono de elec- treto con un espacio de aire exactamente determinado.

Country Status (11)

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

Families Citing this family (4)

* 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
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 (it) * 1971-07-28 1976-05-18
SE362571B (it) * 1971-12-02 1973-12-10 Ericsson Telefon Ab L M
NL7210088A (it) * 1972-07-21 1974-01-23

Also Published As

Publication number Publication date
SE382297B (sv) 1976-01-19
FR2282195B1 (it) 1979-05-11
DK368875A (da) 1976-02-16
DK147670B (da) 1984-11-05
DE2532980B2 (de) 1976-08-05
FI752120A (it) 1976-02-16
FR2282195A1 (fr) 1976-03-12
CH589994A5 (it) 1977-07-29
NO752839L (it) 1976-02-17
NL7509703A (nl) 1976-02-17
DK147670C (da) 1985-05-20
DE2532980A1 (de) 1976-03-04
FI57680B (fi) 1980-05-30
FI57680C (fi) 1980-09-10
GB1510833A (en) 1978-05-17
SE7410408L (sv) 1976-01-19
NO136387B (it) 1977-05-16
DE2532980C3 (de) 1985-07-11
IT1042081B (it) 1980-01-30
NO136387C (no) 1977-08-31

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