IT982996B - IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS WITH ACTIVE ELEMENT OF PIEZOELECTRIC TYPE - Google Patents
IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS WITH ACTIVE ELEMENT OF PIEZOELECTRIC TYPEInfo
- Publication number
- IT982996B IT982996B IT49299/73A IT4929973A IT982996B IT 982996 B IT982996 B IT 982996B IT 49299/73 A IT49299/73 A IT 49299/73A IT 4929973 A IT4929973 A IT 4929973A IT 982996 B IT982996 B IT 982996B
- Authority
- IT
- Italy
- Prior art keywords
- improvement
- active element
- piezoelectric type
- electroacoustic transducers
- electroacoustic
- 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
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24250172A | 1972-04-10 | 1972-04-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
IT982996B true IT982996B (en) | 1974-10-21 |
Family
ID=22915023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT49299/73A IT982996B (en) | 1972-04-10 | 1973-04-06 | IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS WITH ACTIVE ELEMENT OF PIEZOELECTRIC TYPE |
Country Status (11)
Country | Link |
---|---|
US (1) | US3786202A (en) |
JP (1) | JPS5338924B2 (en) |
AU (1) | AU5415873A (en) |
BE (1) | BE798009A (en) |
CA (1) | CA991304A (en) |
DE (2) | DE7313564U (en) |
FR (1) | FR2179883B1 (en) |
GB (1) | GB1399766A (en) |
HK (1) | HK74978A (en) |
IT (1) | IT982996B (en) |
NL (1) | NL173699C (en) |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4035672A (en) * | 1975-02-06 | 1977-07-12 | Cts Corporation | Acoustic transducer with a dual purpose piezoelectric element |
JPS5437135U (en) * | 1977-08-18 | 1979-03-10 | ||
GB2018548B (en) * | 1978-04-07 | 1982-06-16 | Matsushita Electric Ind Co Ltd | Piezoelectric speaker |
JPS5825677Y2 (en) * | 1978-04-07 | 1983-06-02 | 松下電器産業株式会社 | piezoelectric speaker |
DE2831377A1 (en) * | 1978-07-17 | 1980-01-31 | Siemens Ag | ELECTROACOUSTIC CONVERTER |
DE2831362A1 (en) * | 1978-07-17 | 1980-01-31 | Siemens Ag | ELECTROACOUSTIC CONVERTER |
JPS5911237B2 (en) * | 1979-08-16 | 1984-03-14 | 株式会社精工舎 | piezoelectric speaker |
DE3005708C2 (en) * | 1980-02-15 | 1984-08-30 | Siemens AG, 1000 Berlin und 8000 München | Transducer plate for piezoelectric transducers |
EP0057193A1 (en) * | 1980-08-11 | 1982-08-11 | Motorola, Inc. | Apparatus and method for enhancing the frequency response of a loudspeaker |
JPS6025956B2 (en) * | 1980-12-10 | 1985-06-21 | 松下電器産業株式会社 | Ultrasonic transducer |
JPS5851697A (en) * | 1981-09-22 | 1983-03-26 | Matsushita Electric Ind Co Ltd | Ultrasonic wave transceiver |
US4607186A (en) * | 1981-11-17 | 1986-08-19 | Matsushita Electric Industrial Co. Ltd. | Ultrasonic transducer with a piezoelectric element |
US4458170A (en) * | 1981-12-08 | 1984-07-03 | Matsushita Electric Industrial Co., Ltd. | Ultrasonic transmitter-receiver |
US4418248A (en) * | 1981-12-11 | 1983-11-29 | Koss Corporation | Dual element headphone |
US4414436A (en) * | 1982-04-19 | 1983-11-08 | Pioneer Speaker Components, Inc. | Narrow-frequency band acoustic transducer |
US4461930A (en) * | 1982-09-23 | 1984-07-24 | Pioneer Speaker Components, Inc. | Acoustic transducer with honeycomb diaphragm |
JPS59130126U (en) * | 1983-02-18 | 1984-09-01 | 小糸工業株式会社 | data collection storage device |
DE3306801A1 (en) * | 1983-02-26 | 1984-09-06 | Rainer J. 5000 Köln Haas | Spherical high-frequency loudspeaker with piezoelectric drive |
FR2574609A1 (en) * | 1984-09-05 | 1986-06-13 | Sawafuji Dynameca Co Ltd | Piezoelectric element for radio loudspeaker - includes piezoelectric plate with main and auxiliary weights attached to visco-elastic layers on opposed faces |
GB2166022A (en) * | 1984-09-05 | 1986-04-23 | Sawafuji Dynameca Co Ltd | Piezoelectric vibrator |
FR2574610A1 (en) * | 1984-09-05 | 1986-06-13 | Sawafuji Dynameca Co Ltd | Piezoelectric loudspeaker - with two weights joined by viscoelastic layers and connecting rod |
US5193119A (en) * | 1985-09-02 | 1993-03-09 | Franco Tontini | Multiple loudspeaker |
JPH0749914Y2 (en) * | 1986-01-29 | 1995-11-13 | 株式会社村田製作所 | Ultrasonic transducer |
DE4120681A1 (en) * | 1990-08-04 | 1992-02-06 | Bosch Gmbh Robert | ULTRASONIC CONVERTER |
US5652801A (en) * | 1994-05-02 | 1997-07-29 | Aura Systems, Inc. | Resonance damper for piezoelectric transducer |
US5828768A (en) * | 1994-05-11 | 1998-10-27 | Noise Cancellation Technologies, Inc. | Multimedia personal computer with active noise reduction and piezo speakers |
US5638456A (en) * | 1994-07-06 | 1997-06-10 | Noise Cancellation Technologies, Inc. | Piezo speaker and installation method for laptop personal computer and other multimedia applications |
US5444324A (en) * | 1994-07-25 | 1995-08-22 | Western Atlas International, Inc. | Mechanically amplified piezoelectric acoustic transducer |
FR2734685B1 (en) * | 1995-05-23 | 1997-08-14 | Silec Liaisons Elec | PIEZOELECTRIC SPEAKER |
US5901231A (en) | 1995-09-25 | 1999-05-04 | Noise Cancellation Technologies, Inc. | Piezo speaker for improved passenger cabin audio systems |
JPH10294995A (en) * | 1997-04-21 | 1998-11-04 | Matsushita Electric Ind Co Ltd | Dripproof ultrasonic wave transmitter |
US6181797B1 (en) | 1999-01-09 | 2001-01-30 | Noise Cancellation Technologies, Inc. | Piezo speaker for improved passenger cabin audio systems |
GB2404779B (en) * | 2003-08-07 | 2005-08-03 | Sonic Age Ltd | Electro-acoustic device for creating patterns of particulate matter |
US8354773B2 (en) * | 2003-08-22 | 2013-01-15 | Siemens Medical Solutions Usa, Inc. | Composite acoustic absorber for ultrasound transducer backing material |
JP4696487B2 (en) * | 2004-07-15 | 2011-06-08 | リコープリンティングシステムズ株式会社 | RECORDING HEAD AND INKJET RECORDING DEVICE HAVING THE SAME |
US7415121B2 (en) * | 2004-10-29 | 2008-08-19 | Sonion Nederland B.V. | Microphone with internal damping |
CN102124643B (en) * | 2008-07-14 | 2014-04-02 | 株式会社村田制作所 | Piezoelectric power generation device |
WO2010064712A1 (en) * | 2008-12-04 | 2010-06-10 | 株式会社村田製作所 | Ultrasonic wave transmitter/receiver |
KR20120068613A (en) * | 2010-12-17 | 2012-06-27 | 삼성전기주식회사 | Piezoelectric actuator |
CN104335602B (en) * | 2012-08-10 | 2017-11-14 | 京瓷株式会社 | Sound equipment generator, sound equipment generation device and electronic equipment |
US9880671B2 (en) * | 2013-10-08 | 2018-01-30 | Sentons Inc. | Damping vibrational wave reflections |
WO2016118874A1 (en) * | 2015-01-23 | 2016-07-28 | Knowles Electronics, Llc | Piezoelectric speaker driver |
KR101756673B1 (en) * | 2016-06-07 | 2017-07-25 | 주식회사 이엠텍 | Microspeaker enclosure with porous material in resonance space |
KR101788111B1 (en) * | 2016-06-09 | 2017-10-20 | 주식회사 이엠텍 | Microspeaker enclosure with porous material in resonance space |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2518331A (en) * | 1948-05-06 | 1950-08-08 | Bell Telephone Labor Inc | Piezoelectric crystal mounting |
FR1376306A (en) * | 1963-02-07 | 1964-10-23 | Brown Ltd S G | Improvements to electro-acoustic transducers |
GB1159337A (en) * | 1966-06-13 | 1969-07-23 | Motorola Inc | Piezoelectric Transducers |
US3588381A (en) * | 1967-08-28 | 1971-06-28 | Motorola Inc | Transducer having spaced apart oppositely flexing piezoelectric members |
NL6813996A (en) * | 1968-09-30 | 1970-04-01 | ||
US3698993A (en) * | 1971-03-29 | 1972-10-17 | Sonix Inc | Sound deadening sheet material |
-
1972
- 1972-04-10 US US00242501A patent/US3786202A/en not_active Expired - Lifetime
-
1973
- 1973-03-14 CA CA166,055A patent/CA991304A/en not_active Expired
- 1973-03-16 GB GB1283473A patent/GB1399766A/en not_active Expired
- 1973-04-05 AU AU54158/73A patent/AU5415873A/en not_active Expired
- 1973-04-06 IT IT49299/73A patent/IT982996B/en active
- 1973-04-10 NL NLAANVRAGE7305005,A patent/NL173699C/en not_active IP Right Cessation
- 1973-04-10 BE BE129846A patent/BE798009A/en not_active IP Right Cessation
- 1973-04-10 FR FR7312775A patent/FR2179883B1/fr not_active Expired
- 1973-04-10 DE DE19737313564U patent/DE7313564U/en not_active Expired
- 1973-04-10 JP JP4007673A patent/JPS5338924B2/ja not_active Expired
- 1973-04-10 DE DE2318027A patent/DE2318027C3/en not_active Expired
-
1978
- 1978-12-20 HK HK749/78A patent/HK74978A/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE7313564U (en) | 1973-11-22 |
BE798009A (en) | 1973-10-10 |
HK74978A (en) | 1978-12-29 |
US3786202A (en) | 1974-01-15 |
FR2179883A1 (en) | 1973-11-23 |
JPS4910719A (en) | 1974-01-30 |
DE2318027B2 (en) | 1975-03-20 |
CA991304A (en) | 1976-06-15 |
AU5415873A (en) | 1974-10-10 |
GB1399766A (en) | 1975-07-02 |
NL173699C (en) | 1984-02-16 |
DE2318027A1 (en) | 1973-11-08 |
DE2318027C3 (en) | 1975-10-30 |
NL7305005A (en) | 1973-10-12 |
FR2179883B1 (en) | 1979-09-28 |
JPS5338924B2 (en) | 1978-10-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
IT982996B (en) | IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS WITH ACTIVE ELEMENT OF PIEZOELECTRIC TYPE | |
AT349796B (en) | PIEZOELECTRIC PRESSURE TRANSDUCER | |
IT1002250B (en) | UNDERWATER ELECTROACOUSTIC TRANSDUCER | |
FR1522700A (en) | Piezoelectric transducer | |
AT351301B (en) | PIEZO TRANSDUCER-AMPLIFIER ARRANGEMENT | |
IT986369B (en) | ELECTROACOUSTIC TRANSDUCER | |
IT1008673B (en) | IMPROVEMENT IN ELECTRO ACOUSTIC TRANSDUCERS | |
IT972504B (en) | PERFECTION IN ELECTROACOUSTIC TRANSDUCERS | |
CH515499A (en) | Piezoelectric pressure transducer | |
IT989118B (en) | ELECTROACOUSTIC TRANSDUCER | |
IT945061B (en) | IMPROVEMENT IN ELECTROMECHANICAL OR ELECTROACOUSTIC TRANSDUCERS OF THE PIEZOELECTRIC TYPE | |
IT976236B (en) | MAGNETOELASTIC TRANSDUCER | |
IT989265B (en) | IMPROVEMENT IN HARROWS | |
IT990177B (en) | IMPROVEMENT IN ANTI-EXPLOSION PRESSURE TRANSDUCERS | |
AT327294B (en) | PIEZOELECTRIC FILTER ARRANGEMENT | |
IT961893B (en) | IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS OF THE ELECTRO-STATIC TYPE | |
IT984711B (en) | VIBRATING ELEMENT TO GENERATE DIRECTIONAL VIBRATIONS | |
IT977362B (en) | IMPROVEMENT IN ANGULAR POSITION TRANSDUCERS | |
IT979752B (en) | PIEZOELECTRIC TRANSDUCER | |
AT341577B (en) | PIEZOELECTRIC RESONATOR | |
CH540722A (en) | Piezoelectric transducer | |
IT965193B (en) | IMPROVEMENT IN PIEZOELECTRIC TRANSDUCERS | |
BE796100A (en) | ELECTROACOUSTIC TRANSDUCER | |
IT990176B (en) | IMPROVEMENT IN BOURDON TYPE MANOMETERS | |
IT999333B (en) | TRANSDUCERS |