FR2455416A1 - Transducteur electrostatique a sensibilite et amortissement optimaux - Google Patents
Transducteur electrostatique a sensibilite et amortissement optimauxInfo
- Publication number
- FR2455416A1 FR2455416A1 FR8009074A FR8009074A FR2455416A1 FR 2455416 A1 FR2455416 A1 FR 2455416A1 FR 8009074 A FR8009074 A FR 8009074A FR 8009074 A FR8009074 A FR 8009074A FR 2455416 A1 FR2455416 A1 FR 2455416A1
- Authority
- FR
- France
- Prior art keywords
- damping
- transducer
- electrostatic transducer
- optimal sensitivity
- indentations
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
TRANSDUCTEUR ELECTROSTATIQUE DE TYPE CAPACITIF COMBINANT LA TRANSMISSION ET LA RECEPTION. ON OBTIENT GRACE A L'INVENTION UN TEL TRANSDUCTEUR PAR LA FORMATION DE PLAGES ET D'INDENTATIONS EN NOMBRE ET DIMENSIONS CHOISIS SUR LES CRETES 52 DE SAILLIES ESPACEES LES UNES DES AUTRES DANS LA PLAQUE ARRIERE 46 RELATIVEMENT INFLEXIBLE DU TRANSDUCTEUR. APPLICATION, NOTAMMENT AUX SYSTEMES DE TELEMETRIE PAR ULTRASONS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/032,951 US4246449A (en) | 1979-04-24 | 1979-04-24 | Electrostatic transducer having optimum sensitivity and damping |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2455416A1 true FR2455416A1 (fr) | 1980-11-21 |
FR2455416B1 FR2455416B1 (fr) | 1984-04-06 |
Family
ID=21867760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8009074A Granted FR2455416A1 (fr) | 1979-04-24 | 1980-04-23 | Transducteur electrostatique a sensibilite et amortissement optimaux |
Country Status (6)
Country | Link |
---|---|
US (1) | US4246449A (fr) |
JP (1) | JPS55149600A (fr) |
CA (1) | CA1143049A (fr) |
DE (1) | DE3014684A1 (fr) |
FR (1) | FR2455416A1 (fr) |
GB (1) | GB2050756B (fr) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4495385A (en) * | 1982-12-02 | 1985-01-22 | Honeywell Inc. | Acoustic microphone |
CA1277415C (fr) * | 1986-04-11 | 1990-12-04 | Lorne A. Whitehead | Transducteur electrostatique amelioree au moyen d'une membrane d'elastomere |
US4730283A (en) * | 1986-09-15 | 1988-03-08 | Industrial Research Products, Inc. | Acoustic transducer with improved electrode spacing |
US4887248A (en) * | 1988-07-07 | 1989-12-12 | Cleveland Machine Controls, Inc. | Electrostatic transducer and method of making and using same |
US5335286A (en) * | 1992-02-18 | 1994-08-02 | Knowles Electronics, Inc. | Electret assembly |
US5450498A (en) * | 1993-07-14 | 1995-09-12 | The University Of British Columbia | High pressure low impedance electrostatic transducer |
JP2567806B2 (ja) * | 1993-09-29 | 1996-12-25 | 株式会社荏原製作所 | 縦型ガスタービンを用いたポンプ装置 |
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 |
DE19620133C2 (de) * | 1996-05-18 | 2001-09-13 | Endress Hauser Gmbh Co | Schall- oder Ultraschallsensor |
US5982709A (en) * | 1998-03-31 | 1999-11-09 | The Board Of Trustees Of The Leland Stanford Junior University | Acoustic transducers and method of microfabrication |
JP2000050387A (ja) * | 1998-07-16 | 2000-02-18 | Massachusetts Inst Of Technol <Mit> | パラメトリックオ―ディオシステム |
US7391872B2 (en) * | 1999-04-27 | 2008-06-24 | Frank Joseph Pompei | Parametric audio system |
US20040114770A1 (en) * | 2002-10-30 | 2004-06-17 | Pompei Frank Joseph | Directed acoustic sound system |
US6930487B2 (en) * | 2002-12-12 | 2005-08-16 | Howard L. North, Jr. | Method for electronic damping of electrostatic positioners |
JP2005354582A (ja) * | 2004-06-14 | 2005-12-22 | Seiko Epson Corp | 超音波トランスデューサ及びこれを用いた超音波スピーカ |
CN1997243B (zh) * | 2005-12-31 | 2011-07-27 | 财团法人工业技术研究院 | 可挠式扬声器及其制法 |
AU2006341769A1 (en) * | 2006-04-10 | 2007-10-18 | Immersion Technology Property Limited | An electrostatic loudspeaker and stator |
US8329133B2 (en) * | 2008-11-03 | 2012-12-11 | Gt Crystal Systems, Llc | Method and apparatus for refining metallurgical grade silicon to produce solar grade silicon |
US9686618B2 (en) | 2012-06-12 | 2017-06-20 | Frank Joseph Pompei | Ultrasonic transducer |
CN105917667B (zh) * | 2013-11-13 | 2019-06-07 | 乌龟海岸公司 | 超声波音频扬声器和发射器 |
KR20160060231A (ko) | 2014-11-19 | 2016-05-30 | 삼성디스플레이 주식회사 | 휴대 단말기 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE892773C (de) * | 1941-04-17 | 1953-10-12 | Siemens Ag | Kondensator-Mikrofon |
GB1317924A (en) * | 1969-08-04 | 1973-05-23 | Marconi Co Ltd | Capacitive transducers |
US4147425A (en) * | 1978-05-01 | 1979-04-03 | Polaroid Corporation | Photographic processing roller having a surface roughened by electric discharge machining |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081626A (en) * | 1976-11-12 | 1978-03-28 | Polaroid Corporation | Electrostatic transducer having narrowed directional characteristic |
US4085297A (en) * | 1977-06-13 | 1978-04-18 | Polaroid Corporation | Spring force biasing means for electroacoustical transducer components |
-
1979
- 1979-04-24 US US06/032,951 patent/US4246449A/en not_active Expired - Lifetime
-
1980
- 1980-03-03 CA CA000346839A patent/CA1143049A/fr not_active Expired
- 1980-03-26 GB GB8010164A patent/GB2050756B/en not_active Expired
- 1980-04-16 DE DE19803014684 patent/DE3014684A1/de not_active Withdrawn
- 1980-04-23 JP JP5411280A patent/JPS55149600A/ja active Granted
- 1980-04-23 FR FR8009074A patent/FR2455416A1/fr active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE892773C (de) * | 1941-04-17 | 1953-10-12 | Siemens Ag | Kondensator-Mikrofon |
GB1317924A (en) * | 1969-08-04 | 1973-05-23 | Marconi Co Ltd | Capacitive transducers |
US4147425A (en) * | 1978-05-01 | 1979-04-03 | Polaroid Corporation | Photographic processing roller having a surface roughened by electric discharge machining |
Also Published As
Publication number | Publication date |
---|---|
JPS55149600A (en) | 1980-11-20 |
CA1143049A (fr) | 1983-03-15 |
DE3014684A1 (de) | 1980-11-06 |
GB2050756B (en) | 1983-06-08 |
GB2050756A (en) | 1981-01-07 |
JPH0114760B2 (fr) | 1989-03-14 |
US4246449A (en) | 1981-01-20 |
FR2455416B1 (fr) | 1984-04-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2455416A1 (fr) | Transducteur electrostatique a sensibilite et amortissement optimaux | |
IT7824073A0 (it) | Disposizione di trasduttori lineari per formare immagini acustiche olografiche e/o ad eco di impulsi. | |
JPS5362519A (en) | Electrostatic sound transducer | |
IT8025397A0 (it) | Trasduttore piezoelettrico di tangenza a risonanza. | |
FR2668836B1 (fr) | Transducteur acoustique de puits. | |
NL7903908A (nl) | Elektro-akoustische transducent. | |
IT8024775A0 (it) | Trasduttore di pressione capacitivo e relativo dispositivo di valutazione. | |
BE863590A (fr) | Resonateur d'ondes de surface acoustiques | |
IT1128189B (it) | Trasduttore piezoelettrico per generare un segnale dipendente dalla trazione di un filo tessile | |
IT7920932A0 (it) | Rivelatore di prossimita' induttivo che fornisce un segnale di uscita proporzionale alla distanza. | |
ATE7429T1 (de) | Akustischer wandler. | |
ES296513U (es) | Fluidimetro para liquidos | |
IT8119889A0 (it) | Trasduttore acustico. | |
IT7829523A0 (it) | Giunto d'accoppiamento a molla di torsione. | |
NL191225C (nl) | Elektro-akoestische transducent. | |
FR2695771B1 (fr) | Transducteur d'ondes unidirectionnel. | |
IT1079368B (it) | Dispositivo permettente di migliorare il contrasto tra un segnale d'eco principale ed un segnale d'eco secondario ricevuto da un radar in particolare un radar a compressione di impulsi | |
DE3576258D1 (de) | Verbessertes filter mit akustischen oberflaechenwellen. | |
IT1132624B (it) | Dispositivo per determinare l'istante di ricezione di un'onda acustica | |
BR8005981A (pt) | Transdutor piezoeletrico | |
SU769409A1 (ru) | Способ определени коэффициента внешнего трени сыпучих материалов | |
FR2653632B1 (fr) | Transducteur d'ondes de surface unidirectionnel. | |
SU582485A1 (ru) | Ультразвуковой преобразователь | |
NL7808030A (nl) | Reeks verbonden zakenformulieren. | |
SU570733A1 (ru) | Самонастраивающа с фрикционна муфта |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |