SE7410408L - Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap. - Google Patents

Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap.

Info

Publication number
SE7410408L
SE7410408L SE7410408A SE7410408A SE7410408L SE 7410408 L SE7410408 L SE 7410408L SE 7410408 A SE7410408 A SE 7410408A SE 7410408 A SE7410408 A SE 7410408A SE 7410408 L SE7410408 L SE 7410408L
Authority
SE
Sweden
Prior art keywords
layer
electret
procedure
manufacturing
air gap
Prior art date
Application number
SE7410408A
Other languages
Unknown language ( )
English (en)
Swedish (sv)
Other versions
SE382297B (sv
Inventor
N A M Andersson
R B G Jonsson
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
Priority to SE7410408A priority Critical patent/SE7410408L/
Priority to DE2532980A priority patent/DE2532980C3/de
Priority to FI752120A priority patent/FI57680C/sv
Priority to GB33607/75A priority patent/GB1510833A/en
Priority to ES440246A priority patent/ES440246A1/es
Priority to NO752839A priority patent/NO136387C/no
Priority to FR7525443A priority patent/FR2282195A1/fr
Priority to CH1057375A priority patent/CH589994A5/xx
Priority to DK368875A priority patent/DK147670C/da
Priority to IT26359/75A priority patent/IT1042081B/it
Priority to NL7509703A priority patent/NL7509703A/xx
Publication of SE382297B publication Critical patent/SE382297B/xx
Publication of SE7410408L publication Critical patent/SE7410408L/

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)
SE7410408A 1974-08-15 1974-08-15 Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap. SE7410408L (sv)

Priority Applications (11)

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.
DE2532980A DE2532980C3 (de) 1974-08-15 1975-07-23 Verfahren zur Herstellung eines Elektretmikrophons mit genau bestimmtem Luftspalt
FI752120A FI57680C (fi) 1974-08-15 1975-07-24 Foerfarande foer framstaellning av en elektret-mikrofon med ett noggrant bestaemt luftgap
GB33607/75A GB1510833A (en) 1974-08-15 1975-08-12 Process for manufacturing an electret microphone
ES440246A 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.
NO752839A NO136387C (no) 1974-08-15 1975-08-14 Fremgangsm}te for fremstilling av en elektretmikrofon med et n¦yaktig bestemt luftgap
FR7525443A FR2282195A1 (fr) 1974-08-15 1975-08-14 Procede de fabrication d'un microphone a electret
CH1057375A CH589994A5 (enExample) 1974-08-15 1975-08-14
DK368875A DK147670C (da) 1974-08-15 1975-08-14 Fremgangsmaade til fremstilling af en elektretmikrofon med en noejagtigt bestemt luftspalte
IT26359/75A IT1042081B (it) 1974-08-15 1975-08-14 Procedimento di fabbricazione di microfoni ad elettrete
NL7509703A NL7509703A (nl) 1974-08-15 1975-08-14 Werkwijze voor het vervaardigen van een microfoon van de als elektreet aangeduide soort, en een microfoon vervaardigd volgens zulk een werkwijze.

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
SE382297B SE382297B (sv) 1976-01-19
SE7410408L true SE7410408L (sv) 1976-01-19

Family

ID=20321900

Family Applications (1)

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

Country Status (11)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418246A (en) 1980-10-29 1983-11-29 Tibbetts Industries, Inc. Cell assembly for electret transducer

Families Citing this family (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418246A (en) 1980-10-29 1983-11-29 Tibbetts Industries, Inc. Cell assembly for electret transducer

Also Published As

Publication number Publication date
DK368875A (da) 1976-02-16
DE2532980B2 (de) 1976-08-05
SE382297B (sv) 1976-01-19
DK147670C (da) 1985-05-20
GB1510833A (en) 1978-05-17
FI57680B (fi) 1980-05-30
NL7509703A (nl) 1976-02-17
CH589994A5 (enExample) 1977-07-29
FR2282195A1 (fr) 1976-03-12
IT1042081B (it) 1980-01-30
FI57680C (fi) 1980-09-10
FR2282195B1 (enExample) 1979-05-11
NO752839L (enExample) 1976-02-17
NO136387C (no) 1977-08-31
DE2532980A1 (de) 1976-03-04
FI752120A7 (enExample) 1976-02-16
ES440246A1 (es) 1977-03-01
NO136387B (enExample) 1977-05-16
DK147670B (da) 1984-11-05
DE2532980C3 (de) 1985-07-11

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