FR2179883A1 - - Google Patents

Info

Publication number
FR2179883A1
FR2179883A1 FR7312775A FR7312775A FR2179883A1 FR 2179883 A1 FR2179883 A1 FR 2179883A1 FR 7312775 A FR7312775 A FR 7312775A FR 7312775 A FR7312775 A FR 7312775A FR 2179883 A1 FR2179883 A1 FR 2179883A1
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
Application number
FR7312775A
Other languages
French (fr)
Other versions
FR2179883B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of FR2179883A1 publication Critical patent/FR2179883A1/fr
Application granted granted Critical
Publication of FR2179883B1 publication Critical patent/FR2179883B1/fr
Expired legal-status Critical Current

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
FR7312775A 1972-04-10 1973-04-10 Expired FR2179883B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24250172A 1972-04-10 1972-04-10

Publications (2)

Publication Number Publication Date
FR2179883A1 true FR2179883A1 (en) 1973-11-23
FR2179883B1 FR2179883B1 (en) 1979-09-28

Family

ID=22915023

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7312775A Expired FR2179883B1 (en) 1972-04-10 1973-04-10

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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463562A1 (en) * 1979-08-16 1981-02-20 Seikosha Kk PIEZO-ELECTRIC SPEAKER
EP0034730A1 (en) * 1980-02-15 1981-09-02 Siemens Aktiengesellschaft Transducer disk for piezo-electric transducers
FR2574610A1 (en) * 1984-09-05 1986-06-13 Sawafuji Dynameca Co Ltd Piezoelectric loudspeaker - with two weights joined by viscoelastic layers and connecting rod
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

Families Citing this family (40)

* Cited by examiner, † Cited by third party
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
WO1982000543A1 (en) * 1980-08-11 1982-02-18 Inc Motorola 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
GB2166022A (en) * 1984-09-05 1986-04-23 Sawafuji Dynameca Co Ltd Piezoelectric vibrator
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
WO2010007735A1 (en) * 2008-07-14 2010-01-21 株式会社村田製作所 Piezoelectric power generation device
DE112009003590B4 (en) * 2008-12-04 2018-06-14 Murata Manufacturing Co., Ltd. ultrasound transducer
KR20120068613A (en) * 2010-12-17 2012-06-27 삼성전기주식회사 Piezoelectric actuator
JP5960828B2 (en) 2012-08-10 2016-08-02 京セラ株式会社 SOUND GENERATOR, SOUND GENERATOR, AND ELECTRONIC DEVICE
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

Citations (4)

* Cited by examiner, † Cited by third party
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
FR1522700A (en) * 1966-06-13 1968-04-26 Motorola Inc Piezoelectric transducer
FR1578513A (en) * 1967-08-28 1969-08-14

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6813996A (en) * 1968-09-30 1970-04-01
US3698993A (en) * 1971-03-29 1972-10-17 Sonix Inc Sound deadening sheet material

Patent Citations (4)

* Cited by examiner, † Cited by third party
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
FR1522700A (en) * 1966-06-13 1968-04-26 Motorola Inc Piezoelectric transducer
FR1578513A (en) * 1967-08-28 1969-08-14

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463562A1 (en) * 1979-08-16 1981-02-20 Seikosha Kk PIEZO-ELECTRIC SPEAKER
EP0034730A1 (en) * 1980-02-15 1981-09-02 Siemens Aktiengesellschaft Transducer disk for piezo-electric transducers
EP0034730B1 (en) * 1980-02-15 1984-12-05 Siemens Aktiengesellschaft Transducer disk for piezo-electric transducers
FR2574610A1 (en) * 1984-09-05 1986-06-13 Sawafuji Dynameca Co Ltd Piezoelectric loudspeaker - with two weights joined by viscoelastic layers and connecting rod
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

Also Published As

Publication number Publication date
CA991304A (en) 1976-06-15
NL7305005A (en) 1973-10-12
HK74978A (en) 1978-12-29
US3786202A (en) 1974-01-15
FR2179883B1 (en) 1979-09-28
JPS5338924B2 (en) 1978-10-18
JPS4910719A (en) 1974-01-30
IT982996B (en) 1974-10-21
BE798009A (en) 1973-10-10
DE2318027B2 (en) 1975-03-20
DE2318027A1 (en) 1973-11-08
DE7313564U (en) 1973-11-22
AU5415873A (en) 1974-10-10
GB1399766A (en) 1975-07-02
NL173699C (en) 1984-02-16
DE2318027C3 (en) 1975-10-30

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Legal Events

Date Code Title Description
ST Notification of lapse