IT982996B - Perfezionamento nei trasduttori elettroacustici con elemento attivo di tipo piezoelettrico - Google Patents

Perfezionamento nei trasduttori elettroacustici con elemento attivo di tipo piezoelettrico

Info

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
Application number
IT49299/73A
Other languages
English (en)
Italian (it)
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
Application granted granted Critical
Publication of IT982996B publication Critical patent/IT982996B/it

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)
IT49299/73A 1972-04-10 1973-04-06 Perfezionamento nei trasduttori elettroacustici con elemento attivo di tipo piezoelettrico IT982996B (it)

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 (it) 1974-10-21

Family

ID=22915023

Family Applications (1)

Application Number Title Priority Date Filing Date
IT49299/73A IT982996B (it) 1972-04-10 1973-04-06 Perfezionamento nei trasduttori elettroacustici con elemento attivo di tipo piezoelettrico

Country Status (11)

Country Link
US (1) US3786202A (xx)
JP (1) JPS5338924B2 (xx)
AU (1) AU5415873A (xx)
BE (1) BE798009A (xx)
CA (1) CA991304A (xx)
DE (2) DE7313564U (xx)
FR (1) FR2179883B1 (xx)
GB (1) GB1399766A (xx)
HK (1) HK74978A (xx)
IT (1) IT982996B (xx)
NL (1) NL173699C (xx)

Families Citing this family (44)

* 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 (xx) * 1977-08-18 1979-03-10
GB2018548B (en) * 1978-04-07 1982-06-16 Matsushita Electric Ind Co Ltd Piezoelectric speaker
JPS5825677Y2 (ja) * 1978-04-07 1983-06-02 松下電器産業株式会社 圧電形スピ−カ
DE2831362A1 (de) * 1978-07-17 1980-01-31 Siemens Ag Elektroakustischer wandler
DE2831377A1 (de) * 1978-07-17 1980-01-31 Siemens Ag Elektroakustischer wandler
JPS5911237B2 (ja) * 1979-08-16 1984-03-14 株式会社精工舎 圧電スピ−カ
DE3005708C2 (de) * 1980-02-15 1984-08-30 Siemens AG, 1000 Berlin und 8000 München Wandlerplatte für piezoelektrische Wandler
EP0057193A1 (en) * 1980-08-11 1982-08-11 Motorola, Inc. Apparatus and method for enhancing the frequency response of a loudspeaker
JPS6025956B2 (ja) * 1980-12-10 1985-06-21 松下電器産業株式会社 超音波送受波器
JPS5851697A (ja) * 1981-09-22 1983-03-26 Matsushita Electric Ind Co Ltd 超音波送受波器
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 (ja) * 1983-02-18 1984-09-01 小糸工業株式会社 データ収集記憶装置
DE3306801A1 (de) * 1983-02-26 1984-09-06 Rainer J. 5000 Köln Haas Kugelfoermiger hochtonlautsprecher mit piezoelektrischern antrieb
FR2574610A1 (fr) * 1984-09-05 1986-06-13 Sawafuji Dynameca Co Ltd Elements piezoelectriques vibrants et transducteurs piezoelectriques electroacoustiques utilisant de tels elements
GB2166022A (en) * 1984-09-05 1986-04-23 Sawafuji Dynameca Co Ltd Piezoelectric vibrator
FR2574609A1 (fr) * 1984-09-05 1986-06-13 Sawafuji Dynameca Co Ltd Elements piezoelectriques vibrants et transducteurs piezoelectriques electroacoustiques utilisant de tels elements
US5193119A (en) * 1985-09-02 1993-03-09 Franco Tontini Multiple loudspeaker
JPH0749914Y2 (ja) * 1986-01-29 1995-11-13 株式会社村田製作所 超音波トランスデユ−サ
DE4120681A1 (de) * 1990-08-04 1992-02-06 Bosch Gmbh Robert Ultraschallwandler
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 (fr) * 1995-05-23 1997-08-14 Silec Liaisons Elec Haut-parleur piezoelectrique
US5901231A (en) 1995-09-25 1999-05-04 Noise Cancellation Technologies, Inc. Piezo speaker for improved passenger cabin audio systems
JPH10294995A (ja) * 1997-04-21 1998-11-04 Matsushita Electric Ind Co Ltd 防滴型超音波送信器
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 (ja) * 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 記録ヘッド及びこれを備えたインクジェット記録装置
US7415121B2 (en) * 2004-10-29 2008-08-19 Sonion Nederland B.V. Microphone with internal damping
EP2312740B1 (en) * 2008-07-14 2014-06-04 Murata Manufacturing Co. Ltd. Piezoelectric power generation device
WO2010064712A1 (ja) * 2008-12-04 2010-06-10 株式会社村田製作所 超音波送受波器
KR20120068613A (ko) * 2010-12-17 2012-06-27 삼성전기주식회사 압전 액추에이터
WO2014024551A1 (ja) * 2012-08-10 2014-02-13 京セラ株式会社 音響発生器、音響発生装置および電子機器
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 (ko) * 2016-06-07 2017-07-25 주식회사 이엠텍 다공성 물질을 구비하는 마이크로스피커 인클로져
KR101788111B1 (ko) * 2016-06-09 2017-10-20 주식회사 이엠텍 다공성 물질을 구비하는 마이크로스피커 인클로져

Family Cites Families (6)

* 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 (fr) * 1963-02-07 1964-10-23 Brown Ltd S G Perfectionnements aux transducteurs électro-acoustiques
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 (xx) * 1968-09-30 1970-04-01
US3698993A (en) * 1971-03-29 1972-10-17 Sonix Inc Sound deadening sheet material

Also Published As

Publication number Publication date
FR2179883A1 (xx) 1973-11-23
HK74978A (en) 1978-12-29
US3786202A (en) 1974-01-15
CA991304A (en) 1976-06-15
DE7313564U (de) 1973-11-22
NL173699C (nl) 1984-02-16
AU5415873A (en) 1974-10-10
JPS5338924B2 (xx) 1978-10-18
DE2318027C3 (de) 1975-10-30
DE2318027A1 (de) 1973-11-08
BE798009A (fr) 1973-10-10
NL7305005A (xx) 1973-10-12
GB1399766A (en) 1975-07-02
FR2179883B1 (xx) 1979-09-28
DE2318027B2 (de) 1975-03-20
JPS4910719A (xx) 1974-01-30

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