FR2195144A1 - - Google Patents
Info
- Publication number
- FR2195144A1 FR2195144A1 FR7328571A FR7328571A FR2195144A1 FR 2195144 A1 FR2195144 A1 FR 2195144A1 FR 7328571 A FR7328571 A FR 7328571A FR 7328571 A FR7328571 A FR 7328571A FR 2195144 A1 FR2195144 A1 FR 2195144A1
- Authority
- FR
- France
- 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)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Transducers For Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP47078103A JPS5121791B2 (US08197722-20120612-C00093.png) | 1972-08-04 | 1972-08-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2195144A1 true FR2195144A1 (US08197722-20120612-C00093.png) | 1974-03-01 |
| FR2195144B1 FR2195144B1 (US08197722-20120612-C00093.png) | 1978-08-11 |
Family
ID=13652531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7328571A Expired FR2195144B1 (US08197722-20120612-C00093.png) | 1972-08-04 | 1973-08-03 |
Country Status (9)
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51115933U (US08197722-20120612-C00093.png) * | 1975-03-17 | 1976-09-20 | ||
| US4081626A (en) * | 1976-11-12 | 1978-03-28 | Polaroid Corporation | Electrostatic transducer having narrowed directional characteristic |
| JPS53148425A (en) * | 1977-05-31 | 1978-12-25 | Kenkichi Tsukamoto | Electric sound transducer |
| JPS5846800A (ja) * | 1981-09-14 | 1983-03-18 | Matsushita Electric Works Ltd | 静電型超音波振動子 |
| US4439642A (en) * | 1981-12-28 | 1984-03-27 | Polaroid Corporation | High energy ultrasonic transducer |
| US4495385A (en) * | 1982-12-02 | 1985-01-22 | Honeywell Inc. | Acoustic microphone |
| US4891843A (en) * | 1983-02-24 | 1990-01-02 | At&T Technologies, Inc. | Electret microphone |
| US4533794A (en) * | 1983-05-23 | 1985-08-06 | Beveridge Harold N | Electrode for electrostatic transducer |
| US6044160A (en) * | 1998-01-13 | 2000-03-28 | American Technology Corporation | Resonant tuned, ultrasonic electrostatic emitter |
| 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 |
| US6775388B1 (en) | 1998-07-16 | 2004-08-10 | Massachusetts Institute Of Technology | Ultrasonic transducers |
| US6850623B1 (en) | 1999-10-29 | 2005-02-01 | American Technology Corporation | Parametric loudspeaker with improved phase characteristics |
| US20060233404A1 (en) * | 2000-03-28 | 2006-10-19 | American Technology Corporation. | Horn array emitter |
| US6925187B2 (en) * | 2000-03-28 | 2005-08-02 | American Technology Corporation | Horn array emitter |
| US6771785B2 (en) * | 2001-10-09 | 2004-08-03 | Frank Joseph Pompei | Ultrasonic transducer for parametric array |
| 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 |
| JP4998299B2 (ja) * | 2008-02-04 | 2012-08-15 | ヤマハ株式会社 | 静電型スピーカ |
| GB2490931A (en) * | 2011-05-19 | 2012-11-21 | Warwick Audio Technologies Ltd | Electrostatic acoustic transducer |
| EP2858829B1 (en) | 2012-06-12 | 2021-05-19 | Frank Joseph Pompei | Ultrasonic transducer |
| GB2522932A (en) | 2014-02-11 | 2015-08-12 | Warwick Audio Technologies Ltd | Improved electrostatic transducer |
| GB2522931A (en) | 2014-02-11 | 2015-08-12 | Warwick Audio Technologies Ltd | Improved electrostatic transducer |
| WO2017053716A1 (en) * | 2015-09-24 | 2017-03-30 | Frank Joseph Pompei | Ultrasonic transducers |
| GB201906425D0 (en) | 2019-05-07 | 2019-06-19 | Warwick Acoustics Ltd | Electrostatic transducer and diaphragm |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR634695A (fr) * | 1926-05-21 | 1928-02-23 | Dispositif vibratoire électrostatique | |
| FR1330592A (fr) * | 1961-08-07 | 1963-06-21 | Western Electric Co | Transducteur électrostatique |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL22541C (US08197722-20120612-C00093.png) * | 1926-10-20 | |||
| US1745937A (en) * | 1928-03-12 | 1930-02-04 | United Reproducers Patents Cor | Acoustic device |
| US1851240A (en) * | 1928-11-02 | 1932-03-29 | United Reproducers Patents Cor | Electrostatic sound producer |
| US2130946A (en) * | 1936-12-29 | 1938-09-20 | William A Brune | Microphone |
| US3041418A (en) * | 1960-01-14 | 1962-06-26 | Rca Corp | Transducers |
-
1972
- 1972-08-04 JP JP47078103A patent/JPS5121791B2/ja not_active Expired
-
1973
- 1973-07-30 US US383990A patent/US3908098A/en not_active Expired - Lifetime
- 1973-08-02 GB GB3677273A patent/GB1430827A/en not_active Expired
- 1973-08-03 FR FR7328571A patent/FR2195144B1/fr not_active Expired
- 1973-08-03 CA CA178,072A patent/CA1008170A/en not_active Expired
- 1973-08-03 BR BR5950/73A patent/BR7305950D0/pt unknown
- 1973-08-03 DE DE2339433A patent/DE2339433B2/de active Pending
- 1973-08-03 IT IT27521/73A patent/IT992831B/it active
- 1973-08-06 NL NL7310856A patent/NL7310856A/xx not_active Application Discontinuation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR634695A (fr) * | 1926-05-21 | 1928-02-23 | Dispositif vibratoire électrostatique | |
| FR1330592A (fr) * | 1961-08-07 | 1963-06-21 | Western Electric Co | Transducteur électrostatique |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7310856A (US08197722-20120612-C00093.png) | 1974-02-06 |
| US3908098A (en) | 1975-09-23 |
| CA1008170A (en) | 1977-04-05 |
| BR7305950D0 (pt) | 1974-07-11 |
| JPS5121791B2 (US08197722-20120612-C00093.png) | 1976-07-05 |
| FR2195144B1 (US08197722-20120612-C00093.png) | 1978-08-11 |
| DE2339433B2 (de) | 1974-12-19 |
| IT992831B (it) | 1975-09-30 |
| DE2339433A1 (de) | 1974-02-14 |
| GB1430827A (en) | 1976-04-07 |
| JPS4936321A (US08197722-20120612-C00093.png) | 1974-04-04 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |