SE454124B - Akustisk omvandlare innefattande en elektretfolie och en motelektrodplatta med en metallyta - Google Patents
Akustisk omvandlare innefattande en elektretfolie och en motelektrodplatta med en metallytaInfo
- Publication number
- SE454124B SE454124B SE8206382A SE8206382A SE454124B SE 454124 B SE454124 B SE 454124B SE 8206382 A SE8206382 A SE 8206382A SE 8206382 A SE8206382 A SE 8206382A SE 454124 B SE454124 B SE 454124B
- Authority
- SE
- Sweden
- Prior art keywords
- foil
- plate
- counter electrode
- electret
- electrode plate
- 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)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (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 SE8206382L (sv) | 1983-05-21 |
SE454124B true 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 (de) |
JP (1) | JPS5895500A (de) |
CA (1) | CA1186045A (de) |
DE (1) | DE3242578A1 (de) |
FR (1) | FR2517160B1 (de) |
NL (1) | NL8204511A (de) |
SE (1) | SE454124B (de) |
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 |
US6304662B1 (en) * | 1998-01-07 | 2001-10-16 | American Technology Corporation | Sonic emitter with foam stator |
US20020076069A1 (en) * | 1998-01-07 | 2002-06-20 | 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 (fi) * | 1999-11-25 | 2001-11-30 | Kari Johannes Kirjavainen | Kalvo energioiden muuntamiseksi |
WO2002063922A2 (en) * | 2001-01-22 | 2002-08-15 | American Technology Corporation | Improved 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 |
JP2007517420A (ja) * | 2003-06-09 | 2007-06-28 | アメリカン・テクノロジー・コーポレーション | 顧客の待ち列に沿って視聴覚コンテンツを配信するシステムおよび方法 |
US7564981B2 (en) * | 2003-10-23 | 2009-07-21 | American Technology Corporation | Method of adjusting 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 |
---|---|
FR2517160A1 (fr) | 1983-05-27 |
DE3242578A1 (de) | 1983-05-26 |
CA1186045A (en) | 1985-04-23 |
NL8204511A (nl) | 1983-06-16 |
SE8206382D0 (sv) | 1982-11-10 |
SE8206382L (sv) | 1983-05-21 |
US4434327A (en) | 1984-02-28 |
FR2517160B1 (fr) | 1985-10-25 |
JPS5895500A (ja) | 1983-06-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE454124B (sv) | Akustisk omvandlare innefattande en elektretfolie och en motelektrodplatta med en metallyta | |
SE453552B (sv) | Akustisk omvandlare innefattande en elektretfolie och en metalliserad motelektrodplatta | |
US5703761A (en) | Shielding for flat modules | |
US4089003A (en) | Multifrequency microstrip antenna | |
CA1173552A (en) | Electret transducer | |
KR860000640B1 (ko) | 전기 음향변환기 및 그제작방법 | |
US4233477A (en) | Flexible, shapeable, composite acoustic transducer | |
SE453349B (sv) | Akustisk omvandlare med ett riktningsdiagram innehallande en huvudlob och ett flertal i huvudsak vid en forutbestemd troskelniva liggande sidolober | |
SE457924B (sv) | Akustisk riktningsomvandlare, som innefattar en motelektrod och en elektretfolie | |
SE454123B (sv) | Akustisk riktningsomvandlare innefattande en elektretfolie, som har en metallyta och som strecker sig over en motelektrodplatta, som har en metallyta | |
KR0168744B1 (ko) | 전자기 방사 측정 장치 | |
DE3419256C2 (de) | Elektroakustische Wandlereinrichtung | |
DE3269003D1 (en) | Electrostatic acoustical transducer | |
GB1563882A (en) | Sound reproducing apparatus | |
US3321699A (en) | Device for quadratically converting a linear displacement into an electrical quantity | |
GB2110054A (en) | Directional acoustic transducers | |
GB1157479A (en) | A Magnetostriction Device. | |
CA2100146A1 (en) | Apparatus with interconnection arrangement | |
US1631254A (en) | Means of and apparatus for transmitting messages through submarine and other like cables | |
KR20200107823A (ko) | 이방도전성 시트 | |
JPS5738472A (en) | Device electrostatically transcribing particle | |
JPH02139816A (ja) | スイッチ装置 | |
JPH07176263A (ja) | 自己放電式除電器の板状放電電極 | |
JPS6196642A (ja) | 光信号伝送装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
Ref document number: 8206382-7 Effective date: 19920604 Format of ref document f/p: F |