BR7404755D0 - Alto-falante tendo uma bobina fonica e um transdutor piezeletrico de realimentacao - Google Patents
Alto-falante tendo uma bobina fonica e um transdutor piezeletrico de realimentacaoInfo
- Publication number
- BR7404755D0 BR7404755D0 BR4755/74A BR475574A BR7404755D0 BR 7404755 D0 BR7404755 D0 BR 7404755D0 BR 4755/74 A BR4755/74 A BR 4755/74A BR 475574 A BR475574 A BR 475574A BR 7404755 D0 BR7404755 D0 BR 7404755D0
- Authority
- BR
- Brazil
- Prior art keywords
- piezeletric
- phonic
- transducer
- speaker
- feedback
- Prior art date
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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Circuit For Audible Band Transducer (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7308103A NL7308103A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1973-06-12 | 1973-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR7404755D0 true BR7404755D0 (pt) | 1975-01-21 |
Family
ID=19819047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR4755/74A BR7404755D0 (pt) | 1973-06-12 | 1974-06-10 | Alto-falante tendo uma bobina fonica e um transdutor piezeletrico de realimentacao |
Country Status (16)
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5852780Y2 (ja) * | 1980-07-19 | 1983-12-01 | パイオニア株式会社 | マイクロホン |
| JPS58182998A (ja) * | 1982-04-20 | 1983-10-26 | Pioneer Electronic Corp | Ｍｆｂ型スピ−カ |
| US4573189A (en) * | 1983-10-19 | 1986-02-25 | Velodyne Acoustics, Inc. | Loudspeaker with high frequency motional feedback |
| DE3429147C2 (de) * | 1984-08-08 | 1987-04-02 | Friedrich 6650 Homburg Müller | Anordnung zur akustischen Gegenkopplung von Lautsprechern |
| JPS6249395U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1985-09-17 | 1987-03-26 | ||
| US4718098A (en) * | 1986-07-22 | 1988-01-05 | Ashworth William J | Multi-diaphragm artificial reverberation device |
| US4823391A (en) * | 1986-07-22 | 1989-04-18 | Schwartz David M | Sound reproduction system |
| US5889871A (en) * | 1993-10-18 | 1999-03-30 | The United States Of America As Represented By The Secretary Of The Navy | Surface-laminated piezoelectric-film sound transducer |
| US5652801A (en) * | 1994-05-02 | 1997-07-29 | Aura Systems, Inc. | Resonance damper for piezoelectric transducer |
| US5727076A (en) * | 1994-05-02 | 1998-03-10 | Aura Systems, Inc. | Audio transducer having piezoelectric device |
| US5901231A (en) * | 1995-09-25 | 1999-05-04 | Noise Cancellation Technologies, Inc. | Piezo speaker for improved passenger cabin audio systems |
| US6243472B1 (en) * | 1997-09-17 | 2001-06-05 | Frank Albert Bilan | Fully integrated amplified loudspeaker |
| US6584204B1 (en) | 1997-12-11 | 2003-06-24 | The Regents Of The University Of California | Loudspeaker system with feedback control for improved bandwidth and distortion reduction |
| DE19843079A1 (de) * | 1998-09-19 | 2000-03-23 | Nokia Deutschland Gmbh | Multiresonanzplatte |
| EP1425934B1 (en) * | 2001-09-10 | 2007-08-15 | Sonion A/S | Miniature speaker with integrated signal processing electronics |
| CA2408045A1 (en) * | 2001-10-16 | 2003-04-16 | Audio Products International Corp. | Loudspeaker with large displacement motional feedback |
| US7120270B2 (en) * | 2002-09-18 | 2006-10-10 | Bose Corporation | Audio device heat transferring |
| JP4141853B2 (ja) * | 2003-01-30 | 2008-08-27 | 三菱電機株式会社 | スピーカ |
| US9084051B2 (en) * | 2011-02-18 | 2015-07-14 | The Rockefeller University | Unidirectional mechanical amplification in a microphone |
| USD776086S1 (en) * | 2014-04-23 | 2017-01-10 | Martin Audio Limited | Loudspeaker |
| CN107079225B (zh) * | 2014-12-02 | 2019-12-10 | 索尼公司 | 扬声器装置 |
| USD848402S1 (en) | 2014-12-11 | 2019-05-14 | Sony Corporation | Speaker |
| USD791106S1 (en) * | 2014-12-11 | 2017-07-04 | Sony Corporation | Speaker |
| GB201620294D0 (en) | 2016-11-30 | 2017-01-11 | Ge Healthcare Bio Sciences Ab | Optical flow cell |
| GB2620787A (en) | 2022-07-22 | 2024-01-24 | Gp Acoustics Uk Ltd | Loudspeakers |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1932460A (en) * | 1932-04-16 | 1933-10-31 | Patent Engineering Corp | Speaker amplifier |
| US2860183A (en) * | 1954-02-01 | 1958-11-11 | Conrad Ivan Willard | Sound reproducing system |
| US2948778A (en) * | 1956-05-07 | 1960-08-09 | Warner W Clements | Sound reproducing means |
| FR1370980A (fr) * | 1962-11-28 | 1964-08-28 | Brown Ltd S G | Perfectionnements aux transducteurs piézo-électriques |
| NL294443A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1963-06-21 | |||
| JPS4120247Y1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1964-07-18 | 1966-09-26 |
-
1973
- 1973-06-12 NL NL7308103A patent/NL7308103A/xx not_active Application Discontinuation
-
1974
- 1974-05-29 US US05/474,450 patent/US3941932A/en not_active Expired - Lifetime
- 1974-05-30 ZA ZA00743498A patent/ZA743498B/xx unknown
- 1974-05-31 DE DE19742426474 patent/DE2426474B2/de active Granted
- 1974-06-07 CA CA201,910A patent/CA1003554A/en not_active Expired
- 1974-06-07 SE SE7407496A patent/SE395103B/xx unknown
- 1974-06-07 GB GB2545374A patent/GB1471190A/en not_active Expired
- 1974-06-07 DK DK307774AA patent/DK139450B/da not_active IP Right Cessation
- 1974-06-10 AT AT476274A patent/AT332919B/de not_active IP Right Cessation
- 1974-06-10 IT IT68820/74A patent/IT1011942B/it active
- 1974-06-10 JP JP49065132A patent/JPS5034223A/ja active Pending
- 1974-06-10 ES ES427139A patent/ES427139A1/es not_active Expired
- 1974-06-10 CH CH790874A patent/CH569397A5/xx not_active IP Right Cessation
- 1974-06-10 BR BR4755/74A patent/BR7404755D0/pt unknown
- 1974-06-10 BE BE145262A patent/BE816140A/xx not_active IP Right Cessation
- 1974-06-11 FR FR7420130A patent/FR2233784B1/fr not_active Expired
-
1981
- 1981-01-14 JP JP1981002900U patent/JPS605678Y2/ja not_active Expired
Also Published As
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