SE8206381D0 - Elektroakustisk omvandlare - Google Patents

Elektroakustisk omvandlare

Info

Publication number: SE8206381D0
Authority: SE; Sweden
Prior art keywords: electret; backplate; metal layer; rough surface; electret transducer
Prior art date: 1981-11-20

Application number

SE8206381A

Other languages

English (en)

Other versions

SE454123B (sv

SE8206381L (sv

Inventor

D A Berkley

I J Busch-Vishniac

Jr R L Wallace

J E West

Original Assignee

Western Electric Co

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.)

1981-11-20

Filing date

1982-11-10

Publication date

1982-11-10

1982-11-10 Application filed by Western Electric Co filed Critical Western Electric Co

1982-11-10 Publication of SE8206381D0 publication Critical patent/SE8206381D0/sv

1983-05-21 Publication of SE8206381L publication Critical patent/SE8206381L/sv

1988-03-28 Publication of SE454123B publication Critical patent/SE454123B/sv

Classifications

- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/326—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for microphones
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49226—Electret making

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

SE8206381A 1981-11-20 1982-11-10 Akustisk riktningsomvandlare innefattande en elektretfolie, som har en metallyta och som strecker sig over en motelektrodplatta, som har en metallyta SE454123B (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US06/323,667 US4429189A (en)	1981-11-20	1981-11-20	Electret transducer with a selectively metalized backplate

Publications (3)

Publication Number	Publication Date
SE8206381D0 true SE8206381D0 (sv)	1982-11-10
SE8206381L SE8206381L (sv)	1983-05-21
SE454123B SE454123B (sv)	1988-03-28

Family

ID=23260204

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE8206381A SE454123B (sv)	1981-11-20	1982-11-10	Akustisk riktningsomvandlare innefattande en elektretfolie, som har en metallyta och som strecker sig over en motelektrodplatta, som har en metallyta

Country Status (7)

Country	Link
US (1)	US4429189A (sv)
JP (1)	JPH0646838B2 (sv)
CA (1)	CA1186044A (sv)
DE (1)	DE3242556A1 (sv)
FR (1)	FR2517158B1 (sv)
NL (1)	NL8204510A (sv)
SE (1)	SE454123B (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4495385A (en) *	1982-12-02	1985-01-22	Honeywell Inc.	Acoustic microphone
US5388163A (en) *	1991-12-23	1995-02-07	At&T Corp.	Electret transducer array and fabrication technique
WO1997044987A1 (en) *	1996-05-24	1997-11-27	Lesinski S George	Improved microphones for an implantable hearing aid

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR874440A (fr) *	1940-02-12	1942-08-06	Atlas Werke Ag	Appareil pour émissions ou réceptions dirigées d'énergie ondulatoire
GB893444A (en) *	1959-10-15	1962-04-11	Joseph Guy Enock	Improvements in or relating to loudspeakers
US3372245A (en) *	1963-01-25	1968-03-05	Matsushita Electric Ind Co Ltd	Electrostatic electro-acoustic transducer
SE7411457L (sv) *	1973-09-15	1975-03-17	Bowers And Wilkins Electronics
JPS5593180U (sv) *	1978-12-19	1980-06-27
US4311874A (en) *	1979-12-17	1982-01-19	Bell Telephone Laboratories, Incorporated	Teleconference microphone arrays

1981
- 1981-11-20 US US06/323,667 patent/US4429189A/en not_active Expired - Lifetime
1982
- 1982-11-10 SE SE8206381A patent/SE454123B/sv not_active IP Right Cessation
- 1982-11-15 CA CA000415522A patent/CA1186044A/en not_active Expired
- 1982-11-18 FR FR8219312A patent/FR2517158B1/fr not_active Expired
- 1982-11-18 DE DE19823242556 patent/DE3242556A1/de active Granted
- 1982-11-19 NL NL8204510A patent/NL8204510A/nl not_active Application Discontinuation
- 1982-11-20 JP JP57202908A patent/JPH0646838B2/ja not_active Expired - Lifetime

Also Published As

Publication number	Publication date
SE454123B (sv)	1988-03-28
FR2517158A1 (fr)	1983-05-27
US4429189A (en)	1984-01-31
FR2517158B1 (fr)	1986-11-14
DE3242556A1 (de)	1983-05-26
JPS5895499A (ja)	1983-06-07
SE8206381L (sv)	1983-05-21
JPH0646838B2 (ja)	1994-06-15
DE3242556C2 (sv)	1993-08-26
CA1186044A (en)	1985-04-23
NL8204510A (nl)	1983-06-16

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Legal Events

Date	Code	Title	Description
1995-01-31	NAL	Patent in force	Ref document number: 8206381-9 Format of ref document f/p: F
2003-01-07	NUG	Patent has lapsed

Date

Code

Title

Description

1995-01-31

NAL

Patent in force

Ref document number: 8206381-9

Format of ref document f/p: F

2003-01-07

NUG

Patent has lapsed