SE8206382L - Elektroakustisk omvandlare - Google Patents
Elektroakustisk omvandlareInfo
- Publication number
- SE8206382L SE8206382L SE8206382A SE8206382A SE8206382L SE 8206382 L SE8206382 L SE 8206382L SE 8206382 A SE8206382 A SE 8206382A SE 8206382 A SE8206382 A SE 8206382A SE 8206382 L SE8206382 L SE 8206382L
- Authority
- SE
- Sweden
- Prior art keywords
- air gap
- actual air
- gap thickness
- varying
- thickness
- Prior art date
Links
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
-
- 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
- Y10T29/49005—Acoustic transducer
-
- 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)
- Pressure Sensors (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/323,684 US4434327A (en) | 1981-11-20 | 1981-11-20 | Electret transducer with variable actual air gap |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8206382D0 SE8206382D0 (sv) | 1982-11-10 |
SE8206382L true SE8206382L (sv) | 1983-05-21 |
SE454124B SE454124B (sv) | 1988-03-28 |
Family
ID=23260287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8206382A SE454124B (sv) | 1981-11-20 | 1982-11-10 | Akustisk omvandlare innefattande en elektretfolie och en motelektrodplatta med en metallyta |
Country Status (7)
Country | Link |
---|---|
US (1) | US4434327A (sv) |
JP (1) | JPS5895500A (sv) |
CA (1) | CA1186045A (sv) |
DE (1) | DE3242578A1 (sv) |
FR (1) | FR2517160B1 (sv) |
NL (1) | NL8204511A (sv) |
SE (1) | SE454124B (sv) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4567382A (en) * | 1984-04-10 | 1986-01-28 | Microtel B.V. | Electret transducer and a method for manufacturing an assembly of backplate, electret foil and diaphragm plate |
AT385386B (de) * | 1986-07-24 | 1988-03-25 | Akg Akustische Kino Geraete | Elektrostatischer wandler |
US5388163A (en) * | 1991-12-23 | 1995-02-07 | At&T Corp. | Electret transducer array and fabrication technique |
US5473683A (en) * | 1992-02-13 | 1995-12-05 | Northern Telecom Limited | Post assembly process for adjusting the gain of an electret microphone within a communications apparatus |
US5450498A (en) * | 1993-07-14 | 1995-09-12 | The University Of British Columbia | High pressure low impedance electrostatic transducer |
US20020076069A1 (en) * | 1998-01-07 | 2002-06-20 | American Technology Corporation | Sonic emitter with foam stator |
US6304662B1 (en) * | 1998-01-07 | 2001-10-16 | American Technology Corporation | Sonic emitter with foam stator |
US6310429B1 (en) * | 1998-05-18 | 2001-10-30 | Nortel Networks Limited | Acoustic wave transducer device |
US6850623B1 (en) * | 1999-10-29 | 2005-02-01 | American Technology Corporation | Parametric loudspeaker with improved phase characteristics |
US20050100181A1 (en) * | 1998-09-24 | 2005-05-12 | Particle Measuring Systems, Inc. | Parametric transducer having an emitter film |
US20050195985A1 (en) * | 1999-10-29 | 2005-09-08 | American Technology Corporation | Focused parametric array |
FI108204B (sv) * | 1999-11-25 | 2001-11-30 | Kari Johannes Kirjavainen | Film för transformering av energier |
US7142688B2 (en) * | 2001-01-22 | 2006-11-28 | American Technology Corporation | Single-ended planar-magnetic speaker |
US6934402B2 (en) * | 2001-01-26 | 2005-08-23 | American Technology Corporation | Planar-magnetic speakers with secondary magnetic structure |
US6526149B1 (en) * | 2001-06-28 | 2003-02-25 | Earthworks, Inc. | System and method for reducing non linear electrical distortion in an electroacoustic device |
US20060280315A1 (en) * | 2003-06-09 | 2006-12-14 | American Technology Corporation | System and method for delivering audio-visual content along a customer waiting line |
WO2005043771A1 (en) * | 2003-10-23 | 2005-05-12 | American Technology Corporation | Method of adusting linear parameters of a parametric ultrasonic signal to reduce non-linearities in decoupled audio output waves and system including same |
US8275137B1 (en) | 2007-03-22 | 2012-09-25 | Parametric Sound Corporation | Audio distortion correction for a parametric reproduction system |
US9332344B2 (en) | 2013-06-13 | 2016-05-03 | Turtle Beach Corporation | Self-bias emitter circuit |
Family Cites Families (5)
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 |
US3778561A (en) * | 1972-06-21 | 1973-12-11 | Bell Canada Northern Electric | Electret microphone |
US4081626A (en) * | 1976-11-12 | 1978-03-28 | Polaroid Corporation | Electrostatic transducer having narrowed directional characteristic |
US4311874A (en) * | 1979-12-17 | 1982-01-19 | Bell Telephone Laboratories, Incorporated | Teleconference microphone arrays |
-
1981
- 1981-11-20 US US06/323,684 patent/US4434327A/en not_active Expired - Lifetime
-
1982
- 1982-11-10 SE SE8206382A patent/SE454124B/sv not_active IP Right Cessation
- 1982-11-15 CA CA000415535A patent/CA1186045A/en not_active Expired
- 1982-11-18 DE DE19823242578 patent/DE3242578A1/de not_active Ceased
- 1982-11-18 FR FR8219314A patent/FR2517160B1/fr not_active Expired
- 1982-11-19 NL NL8204511A patent/NL8204511A/nl not_active Application Discontinuation
- 1982-11-20 JP JP57202909A patent/JPS5895500A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US4434327A (en) | 1984-02-28 |
NL8204511A (nl) | 1983-06-16 |
FR2517160B1 (fr) | 1985-10-25 |
DE3242578A1 (de) | 1983-05-26 |
SE8206382D0 (sv) | 1982-11-10 |
JPS5895500A (ja) | 1983-06-07 |
SE454124B (sv) | 1988-03-28 |
FR2517160A1 (fr) | 1983-05-27 |
CA1186045A (en) | 1985-04-23 |
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Legal Events
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NUG | Patent has lapsed |
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