SE8206383L - Elektroakustisk omvandlare - Google Patents

Elektroakustisk omvandlare

Info

Publication number: SE8206383L
Authority: SE; Sweden
Prior art keywords: electret; electroacustic; converter; thickness; electret foil
Prior art date: 1981-11-20

Application number

SE8206383A

Other languages

Unknown language ( )

English (en)

Other versions

SE453349B (sv

SE8206383D0 (sv

Inventor

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

1983-05-21

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

1982-11-10 Publication of SE8206383D0 publication Critical patent/SE8206383D0/sv

1983-05-21 Publication of SE8206383L publication Critical patent/SE8206383L/sv

1988-01-25 Publication of SE453349B publication Critical patent/SE453349B/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
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/32—Sound-focusing or directing, e.g. scanning characterised by the shape of the source
- 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
- 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)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
General Physics & Mathematics (AREA)
Signal Processing (AREA)
Multimedia (AREA)
Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Piezo-Electric Transducers For Audible Bands (AREA)

SE8206383A 1981-11-20 1982-11-10 Akustisk omvandlare med ett riktningsdiagram innehallande en huvudlob och ett flertal i huvudsak vid en forutbestemd troskelniva liggande sidolober SE453349B (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US06/323,696 US4429192A (en)	1981-11-20	1981-11-20	Electret transducer with variable electret foil thickness

Publications (3)

Publication Number	Publication Date
SE8206383D0 SE8206383D0 (sv)	1982-11-10
SE8206383L true SE8206383L (sv)	1983-05-21
SE453349B SE453349B (sv)	1988-01-25

Family

ID=23260342

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE8206383A SE453349B (sv)	1981-11-20	1982-11-10	Akustisk omvandlare med ett riktningsdiagram innehallande en huvudlob och ett flertal i huvudsak vid en forutbestemd troskelniva liggande sidolober

Country Status (7)

Country	Link
US (1)	US4429192A (sv)
JP (1)	JPS5896497A (sv)
CA (1)	CA1186047A (sv)
DE (1)	DE3242554A1 (sv)
FR (1)	FR2517161B1 (sv)
NL (1)	NL8204512A (sv)
SE (1)	SE453349B (sv)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5388163A (en) *	1991-12-23	1995-02-07	At&T Corp.	Electret transducer array and fabrication technique
US5619476A (en) *	1994-10-21	1997-04-08	The Board Of Trustees Of The Leland Stanford Jr. Univ.	Electrostatic ultrasonic transducer
US5894452A (en) *	1994-10-21	1999-04-13	The Board Of Trustees Of The Leland Stanford Junior University	Microfabricated ultrasonic immersion transducer
AU2923397A (en) *	1996-04-18	1997-11-07	California Institute Of Technology	Thin film electret microphone
US5952645A (en) *	1996-08-27	1999-09-14	California Institute Of Technology	Light-sensing array with wedge-like reflective optical concentrators
US5982709A (en) *	1998-03-31	1999-11-09	The Board Of Trustees Of The Leland Stanford Junior University	Acoustic transducers and method of microfabrication
US6310429B1 (en) *	1998-05-18	2001-10-30	Nortel Networks Limited	Acoustic wave transducer device
DK79198A (da) *	1998-06-11	1999-12-12	Microtronic As	Fremgangsmåde til fremstilling af en transducer med en membran med en forudbestemt opspændingskraft
AU5030100A (en) *	1999-05-19	2000-12-05	California Institute Of Technology	High performance mems thin-film teflon electret microphone

Family Cites Families (3)

* 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
US3372245A (en) *	1963-01-25	1968-03-05	Matsushita Electric Ind Co Ltd	Electrostatic electro-acoustic transducer
US4311874A (en) *	1979-12-17	1982-01-19	Bell Telephone Laboratories, Incorporated	Teleconference microphone arrays

1981
- 1981-11-20 US US06/323,696 patent/US4429192A/en not_active Expired - Lifetime
1982
- 1982-11-10 SE SE8206383A patent/SE453349B/sv not_active IP Right Cessation
- 1982-11-15 CA CA000415614A patent/CA1186047A/en not_active Expired
- 1982-11-18 FR FR8219315A patent/FR2517161B1/fr not_active Expired
- 1982-11-18 DE DE19823242554 patent/DE3242554A1/de not_active Ceased
- 1982-11-19 NL NL8204512A patent/NL8204512A/nl not_active Application Discontinuation
- 1982-11-20 JP JP57202911A patent/JPS5896497A/ja active Pending

Also Published As

Publication number	Publication date
FR2517161A1 (fr)	1983-05-27
US4429192A (en)	1984-01-31
DE3242554A1 (de)	1983-05-26
CA1186047A (en)	1985-04-23
SE453349B (sv)	1988-01-25
SE8206383D0 (sv)	1982-11-10
FR2517161B1 (fr)	1986-03-14
JPS5896497A (ja)	1983-06-08
NL8204512A (nl)	1983-06-16

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Legal Events

Date	Code	Title	Description
1995-01-31	NUG	Patent has lapsed	Ref document number: 8206383-5 Effective date: 19920604 Format of ref document f/p: F

Date

Code

Title

Description

1995-01-31

NUG

Patent has lapsed

Ref document number: 8206383-5

Effective date: 19920604

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