IT1042081B - Procedimento di fabbricazione di microfoni ad elettrete - Google Patents

Procedimento di fabbricazione di microfoni ad elettrete

Info

Publication number: IT1042081B
Authority: IT; Italy
Prior art keywords: manufacturing procedure; microphone manufacturing; electronic microphone; electronic; procedure
Prior art date: 1974-08-15

Application number

IT26359/75A

Other languages

English (en)

Inventor

N Andersson

R 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.)

1974-08-15

Filing date

1975-08-14

Publication date

1980-01-30

1975-08-14 Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M

1980-01-30 Application granted granted Critical

1980-01-30 Publication of IT1042081B publication Critical patent/IT1042081B/it

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)

IT26359/75A 1974-08-15 1975-08-14 Procedimento di fabbricazione di microfoni ad elettrete IT1042081B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
SE7410408A SE382297B (sv)	1974-08-15	1974-08-15	Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap.

Publications (1)

Publication Number	Publication Date
IT1042081B true IT1042081B (it)	1980-01-30

Family

ID=20321900

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT26359/75A IT1042081B (it)	1974-08-15	1975-08-14	Procedimento di fabbricazione di microfoni ad elettrete

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)	SE382297B (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

1974
- 1974-08-15 SE SE7410408A patent/SE382297B/xx not_active IP Right Cessation
1975
- 1975-07-23 DE DE2532980A patent/DE2532980C3/de not_active Expired
- 1975-07-24 FI FI752120A patent/FI57680C/sv not_active IP Right Cessation
- 1975-08-12 GB GB33607/75A patent/GB1510833A/en not_active Expired
- 1975-08-14 DK DK368875A patent/DK147670C/da not_active IP Right Cessation
- 1975-08-14 NL NL7509703A patent/NL7509703A/xx not_active Application Discontinuation
- 1975-08-14 CH CH1057375A patent/CH589994A5/xx not_active IP Right Cessation
- 1975-08-14 IT IT26359/75A patent/IT1042081B/it active
- 1975-08-14 ES ES440246A patent/ES440246A1/es not_active Expired
- 1975-08-14 NO NO752839A patent/NO136387C/no unknown
- 1975-08-14 FR FR7525443A patent/FR2282195A1/fr active Granted

Also Published As

Publication number	Publication date
DK147670C (da)	1985-05-20
NO136387C (no)	1977-08-31
FI57680B (fi)	1980-05-30
NO752839L (it)	1976-02-17
SE7410408L (sv)	1976-01-19
DE2532980A1 (de)	1976-03-04
GB1510833A (en)	1978-05-17
DK368875A (da)	1976-02-16
FI752120A (it)	1976-02-16
FR2282195A1 (fr)	1976-03-12
DE2532980C3 (de)	1985-07-11
FI57680C (fi)	1980-09-10
ES440246A1 (es)	1977-03-01
FR2282195B1 (it)	1979-05-11
CH589994A5 (it)	1977-07-29
NO136387B (it)	1977-05-16
NL7509703A (nl)	1976-02-17
DK147670B (da)	1984-11-05
SE382297B (sv)	1976-01-19
DE2532980B2 (de)	1976-08-05

Publication	Publication Date	Title
SE7413047L (sv)	1976-04-20	Mikrofon
TR18704A (tr)	1977-08-10	Triazol tuerevleri
DK409175A (da)	1976-03-17	Hovedtelefon
FR2278208A1 (fr)	1976-02-06	Circuit integre
AT373724B (de)	1984-02-10	Integrierte schaltung
IT1039561B (it)	1979-12-10	Trasduttori ad estensimetro
DE2559729A1 (de)	1977-08-25	Integrierte schaltung
IT1064349B (it)	1985-02-18	Procedimento di fabbricazione di idrossi-arilaldeidi
AT351283B (de)	1979-07-10	Akustisches mikroskop
FR2296341A1 (fr)	1976-07-23	Microphone a condensateur
SE7607437L (sv)	1977-01-09	Elektroniskt telefonnet
SE397142B (sv)	1977-10-17	Elektrostaisk kopieringsmaskin
SE7501673L (sv)	1975-12-08	Hogtalare
AT350107B (de)	1979-05-10	Verstaerkerschaltung
NL7402575A (nl)	1975-08-28	Elektronisch telefoontoestel.
NL7416395A (nl)	1976-06-21	Elektronenmikroskoop.
SE384959B (sv)	1976-05-24	Telefontillsats
IT1041872B (it)	1980-01-10	Apparecchio telefonico
IT1042081B (it)	1980-01-30	Procedimento di fabbricazione di microfoni ad elettrete
SE7506416L (sv)	1975-12-09	Elektronisk taxameter.
FR2282203A1 (fr)	1976-03-12	Haut-parleur
SE7513387L (sv)	1976-05-31	Elektronisk kopplingsapparat
IT1044741B (it)	1980-04-21	Produzione di nitruro di borocubico
SE413061B (sv)	1980-03-31	Elektrisk kondensator
DK290875A (da)	1975-12-28	Elektrisk lagkondensator