CA989972A - Electroacoustic transducer - Google Patents

Electroacoustic transducer

Info

Publication number
CA989972A
CA989972A CA155,743A CA155743A CA989972A CA 989972 A CA989972 A CA 989972A CA 155743 A CA155743 A CA 155743A CA 989972 A CA989972 A CA 989972A
Authority
CA
Canada
Prior art keywords
electroacoustic transducer
electroacoustic
transducer
Prior art date
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.)
Expired
Application number
CA155,743A
Other languages
English (en)
Other versions
CA155743S (en
Inventor
Takao Oikawa
Naohiro Murayama
Kenichi Nakamura
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.)
Kureha Corp
Original Assignee
Kureha Corp
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 Kureha Corp filed Critical Kureha Corp
Application granted granted Critical
Publication of CA989972A publication Critical patent/CA989972A/en
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
    • H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer
    • 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
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/013—Electrostatic transducers characterised by the use of electrets for loudspeakers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S310/00—Electrical generator or motor structure
    • Y10S310/80—Piezoelectric polymers, e.g. PVDF

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Headphones And Earphones (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
CA155,743A 1971-11-04 1972-10-31 Electroacoustic transducer Expired CA989972A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46087854A JPS5221364B2 (pt) 1971-11-04 1971-11-04

Publications (1)

Publication Number Publication Date
CA989972A true CA989972A (en) 1976-05-25

Family

ID=13926458

Family Applications (1)

Application Number Title Priority Date Filing Date
CA155,743A Expired CA989972A (en) 1971-11-04 1972-10-31 Electroacoustic transducer

Country Status (6)

Country Link
US (1) US3894198A (pt)
JP (1) JPS5221364B2 (pt)
CA (1) CA989972A (pt)
FR (1) FR2158571B1 (pt)
GB (1) GB1405789A (pt)
NL (1) NL7214888A (pt)

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FR2199430A5 (pt) * 1972-09-08 1974-04-05 Anvar
JPS5745760Y2 (pt) * 1974-02-18 1982-10-08
JPS50117412A (pt) * 1974-02-18 1975-09-13
US3980838A (en) * 1974-02-20 1976-09-14 Tokyo Shibaura Electric Co., Ltd. Plural electret electroacoustic transducer
JPS5215972B2 (pt) * 1974-02-28 1977-05-06
US3970862A (en) * 1974-06-25 1976-07-20 The United States Of America As Represented By The Secretary Of The Navy Polymeric sensor of vibration and dynamic pressure
JPS51101927U (pt) * 1975-02-14 1976-08-16
JPS5215319A (en) * 1975-07-25 1977-02-04 Matsushita Electric Ind Co Ltd Electric sound convertor
GB1520118A (en) * 1975-08-11 1978-08-02 Rank Organisation Ltd Transducers
US4146800A (en) * 1975-10-08 1979-03-27 Gregory Stephen E Apparatus and method of generating electricity from wind energy
US4170185A (en) * 1978-01-09 1979-10-09 Lectret S.A. Preventing marine fouling
US4207442A (en) * 1978-05-15 1980-06-10 Freeman Miller L Driver circuit for electrostatic transducers
JPS5512508A (en) * 1978-07-10 1980-01-29 Kureha Chem Ind Co Ltd Information recording sheet
US4331840A (en) * 1980-02-22 1982-05-25 Lectret S.A. Electret transducer with tapered acoustic chamber
GB2079054B (en) * 1980-06-30 1984-02-22 Tokyo Shibaura Electric Co Electret device
US4440027A (en) * 1982-05-26 1984-04-03 Ford Motor Company Velocity and mass air flow sensor
DE3437488A1 (de) * 1984-10-12 1986-04-17 Richard Wolf Gmbh, 7134 Knittlingen Schallsender
US4868447A (en) * 1987-09-11 1989-09-19 Cornell Research Foundation, Inc. Piezoelectric polymer laminates for torsional and bending modal control
US4985926A (en) * 1988-02-29 1991-01-15 Motorola, Inc. High impedance piezoelectric transducer
US5558298A (en) * 1994-12-05 1996-09-24 General Electric Company Active noise control of aircraft engine discrete tonal noise
US5949892A (en) * 1995-12-07 1999-09-07 Advanced Micro Devices, Inc. Method of and apparatus for dynamically controlling operating characteristics of a microphone
US6140740A (en) * 1997-12-30 2000-10-31 Remon Medical Technologies, Ltd. Piezoelectric transducer
US20030036746A1 (en) 2001-08-16 2003-02-20 Avi Penner Devices for intrabody delivery of molecules and systems and methods utilizing same
US6760455B2 (en) * 2000-07-13 2004-07-06 American Technology Corporation Electrostatic loudspeaker with a distributed filter
AT410498B (de) * 2001-02-20 2003-05-26 Akg Acoustics Gmbh Elektroakustische kapsel
US6978032B2 (en) * 2001-11-29 2005-12-20 Matsushita Electric Industrial Co., Ltd. Piezoelectric speaker
GB0204572D0 (en) * 2002-02-27 2002-04-10 Univ Warwick Non contacting air-coupled ultrasonic inspection system for food and drinks
JP5121011B2 (ja) * 2004-11-24 2013-01-16 レモン メディカル テクノロジーズ リミテッド 音響トランスデューサを組み込んだインプラント可能な医療機器
US7522962B1 (en) 2004-12-03 2009-04-21 Remon Medical Technologies, Ltd Implantable medical device with integrated acoustic transducer
EP1880403B1 (en) * 2005-05-02 2012-06-13 Epcos Ag Capacitive rf-mems device with integrated decoupling capacitor
US20080212807A1 (en) * 2005-06-08 2008-09-04 General Mems Corporation Micromachined Acoustic Transducers
US7570998B2 (en) * 2005-08-26 2009-08-04 Cardiac Pacemakers, Inc. Acoustic communication transducer in implantable medical device header
US7615012B2 (en) * 2005-08-26 2009-11-10 Cardiac Pacemakers, Inc. Broadband acoustic sensor for an implantable medical device
JP2008042869A (ja) * 2005-10-05 2008-02-21 Seiko Epson Corp 静電型超音波トランスデューサ、超音波スピーカ、音声信号再生方法、超指向性音響システム及び表示装置
WO2008011577A2 (en) 2006-07-21 2008-01-24 Cardiac Pacemakers, Inc. Ultrasonic transducer for a metallic cavity implanted medical device
US7912548B2 (en) * 2006-07-21 2011-03-22 Cardiac Pacemakers, Inc. Resonant structures for implantable devices
US8825161B1 (en) 2007-05-17 2014-09-02 Cardiac Pacemakers, Inc. Acoustic transducer for an implantable medical device
AU2008266678B2 (en) 2007-06-14 2013-06-20 Cardiac Pacemakers, Inc. Multi-element acoustic recharging system
TWI343756B (en) * 2009-08-10 2011-06-11 Ind Tech Res Inst Flat loudspeaker structure
US20100103115A1 (en) * 2008-10-24 2010-04-29 Sony Ericsson Mobile Communications Ab Display arrangement and electronic device
CN101754078A (zh) * 2008-12-12 2010-06-23 志丰电子股份有限公司 驻极体背极式双振膜电声致动器及其制法
US8520869B2 (en) * 2010-03-29 2013-08-27 Panasonic Corporation Piezoelectric acoustic transducer
JP5195895B2 (ja) * 2010-12-27 2013-05-15 株式会社村田製作所 圧電発音部品
CN102651836A (zh) * 2011-02-28 2012-08-29 千如电机工业股份有限公司 用于平板型电声致动器的音讯驱动器
EP2512029A1 (en) * 2011-04-11 2012-10-17 ABC Taiwan Electronics Corp. Audio signal driver for flat sound generator
DE102012221833A1 (de) * 2012-11-29 2014-06-05 Robert Bosch Gmbh Wandler mit zumindest einer Elektrode eines ersten Typs, einer Elektrode eines zweiten Typs und zumindest einem Ferroelektret
JP6278619B2 (ja) * 2013-06-14 2018-02-14 古河電気工業株式会社 振動発電体
DE102013222231A1 (de) * 2013-10-31 2015-04-30 Sennheiser Electronic Gmbh & Co. Kg Hörer
KR20160068059A (ko) 2014-12-04 2016-06-15 삼성디스플레이 주식회사 다공성 압전 박막을 포함하는 압전 소자
US10120449B2 (en) 2015-08-25 2018-11-06 Immersion Corporation Parallel plate actuator
KR101703608B1 (ko) * 2015-08-28 2017-02-07 현대자동차 주식회사 탈착형 마이크로폰 및 그 제조 방법

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE524082C (de) * 1928-09-07 1931-05-01 Siemens & Halske Akt Ges Lautsprecher mit mehreren nach verschiedenartigen Prinzipien arbeitenden elektrischen Antriebssystemen
US2478223A (en) * 1946-03-01 1949-08-09 Clarkstan Corp Electrostrictive translator
JPS4815867B1 (pt) * 1969-08-28 1973-05-17
US3646413A (en) * 1970-09-25 1972-02-29 Avco Corp Piezoelectric-driven variable capacitor

Also Published As

Publication number Publication date
JPS5221364B2 (pt) 1977-06-10
US3894198A (en) 1975-07-08
GB1405789A (en) 1975-09-10
NL7214888A (pt) 1973-05-08
DE2253721B2 (de) 1976-02-12
FR2158571A1 (pt) 1973-06-15
DE2253721A1 (de) 1973-05-24
JPS4853713A (pt) 1973-07-28
FR2158571B1 (pt) 1978-11-03

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