IT1088489B - Trasduttore sonico elettrostatico - Google Patents

Trasduttore sonico elettrostatico

Info

Publication number
IT1088489B
IT1088489B IT29423/77A IT2942377A IT1088489B IT 1088489 B IT1088489 B IT 1088489B IT 29423/77 A IT29423/77 A IT 29423/77A IT 2942377 A IT2942377 A IT 2942377A IT 1088489 B IT1088489 B IT 1088489B
Authority
IT
Italy
Prior art keywords
sonic transducer
electrostatic
electrostatic sonic
transducer
sonic
Prior art date
Application number
IT29423/77A
Other languages
English (en)
Original Assignee
Polaroid 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 Polaroid Corp filed Critical Polaroid Corp
Application granted granted Critical
Publication of IT1088489B publication Critical patent/IT1088489B/it

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/16Mounting or tensioning of diaphragms or cones
    • H04R7/24Tensioning by means acting directly on free portions of diaphragm or cone
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01HMEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00Electrostatic transducers
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00Communications, electrical: acoustic wave systems and devices
    • Y10S367/905Side lobe reduction or shading

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
IT29423/77A 1976-11-12 1977-11-08 Trasduttore sonico elettrostatico IT1088489B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/741,228 US4081626A (en) 1976-11-12 1976-11-12 Electrostatic transducer having narrowed directional characteristic

Publications (1)

Publication Number Publication Date
IT1088489B true IT1088489B (it) 1985-06-10

Family

ID=24979863

Family Applications (1)

Application Number Title Priority Date Filing Date
IT29423/77A IT1088489B (it) 1976-11-12 1977-11-08 Trasduttore sonico elettrostatico

Country Status (10)

Country Link
US (1) US4081626A (it)
JP (1) JPS5362519A (it)
AT (1) AT371257B (it)
AU (1) AU513326B2 (it)
CA (1) CA1119710A (it)
CH (1) CH626763A5 (it)
DE (1) DE2749987C3 (it)
FR (1) FR2371115A1 (it)
GB (1) GB1589446A (it)
IT (1) IT1088489B (it)

Families Citing this family (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085297A (en) * 1977-06-13 1978-04-18 Polaroid Corporation Spring force biasing means for electroacoustical transducer components
GB2044037B (en) * 1978-12-23 1983-03-23 Tokyo Shibaura Electric Co Electrostatic microphone
US4246449A (en) * 1979-04-24 1981-01-20 Polaroid Corporation Electrostatic transducer having optimum sensitivity and damping
US4311881A (en) * 1979-07-05 1982-01-19 Polaroid Corporation Electrostatic transducer backplate having open ended grooves
US4317005A (en) * 1979-10-15 1982-02-23 Bruyne Pieter De Position-determining system
JPS5799100A (en) * 1980-12-12 1982-06-19 Matsushita Electric Works Ltd Electrostatic type electro-acoustic converter
JPS5846800A (ja) * 1981-09-14 1983-03-18 Matsushita Electric Works Ltd 静電型超音波振動子
US4434327A (en) * 1981-11-20 1984-02-28 Bell Telephone Laboratories, Incorporated Electret transducer with variable actual air gap
US4429193A (en) * 1981-11-20 1984-01-31 Bell Telephone Laboratories, Incorporated Electret transducer with variable effective air gap
US4439642A (en) * 1981-12-28 1984-03-27 Polaroid Corporation High energy ultrasonic transducer
US4490814A (en) * 1982-09-30 1984-12-25 Polaroid Corporation Sonic autofocus camera having variable sonic beamwidth
US4440482A (en) * 1982-09-30 1984-04-03 Polaroid Corporation Sonic autofocus camera having variable sonic beamwidth
EP0132039A3 (en) * 1983-06-09 1986-07-23 Robert Bacon Pepper Moisture resistant cover for an electroacoustic transducer
US4887246A (en) * 1983-09-15 1989-12-12 Ultrasonic Arrays, Inc. Ultrasonic apparatus, system and method
AU573655B2 (en) * 1983-12-05 1988-06-16 Kay, L. Transducer array
US4872148A (en) * 1984-03-08 1989-10-03 Polaroid Corporation Ultrasonic transducer for use in a corrosive/abrasive environment
US4695986A (en) * 1985-03-28 1987-09-22 Ultrasonic Arrays, Inc. Ultrasonic transducer component and process for making the same and assembly
US4858203A (en) * 1985-09-26 1989-08-15 Position Orientation Systems, Inc. Omnidirectional distance measurement system
JPS62149299A (ja) * 1985-12-24 1987-07-03 Agency Of Ind Science & Technol アレイ型超音波トランスデユ−サ
CH669676A5 (it) * 1986-01-23 1989-03-31 Zellweger Uster Ag
CA1277415C (en) * 1986-04-11 1990-12-04 Lorne A. Whitehead Elastomer membrane enhanced electrostatic transducer
US4799077A (en) * 1987-11-23 1989-01-17 Polaroid Corporation Common drive for shutter blades and objective lens assembly
WO1989005558A1 (en) * 1987-12-10 1989-06-15 Ultrasonic Arrays, Inc. Ultrasonic transducer with tensioned diaphragm and method
US4980873A (en) * 1987-12-10 1990-12-25 Gross William C Ultrasonic transducer with tensioned diaphragm and method
US4887248A (en) * 1988-07-07 1989-12-12 Cleveland Machine Controls, Inc. Electrostatic transducer and method of making and using same
US5764782A (en) * 1993-03-23 1998-06-09 Hayes; Joseph Francis Acoustic reflector
US5450498A (en) * 1993-07-14 1995-09-12 The University Of British Columbia High pressure low impedance electrostatic transducer
GB2301507B (en) * 1994-03-08 1997-11-19 Jonathan Neil Smith Electromagnetic loudspeaker
GB9404585D0 (en) * 1994-03-08 1994-04-20 Smith Jonathan N Loudspeaker
US5442595A (en) * 1994-04-22 1995-08-15 Xecutek Corporation Capacitance-type ultrasonic transducer
US5619476A (en) * 1994-10-21 1997-04-08 The Board Of Trustees Of The Leland Stanford Jr. Univ. Electrostatic ultrasonic transducer
US5894452A (en) * 1994-10-21 1999-04-13 The Board Of Trustees Of The Leland Stanford Junior University Microfabricated ultrasonic immersion transducer
US5600610A (en) * 1995-01-31 1997-02-04 Gas Research Institute Electrostatic transducer and method for manufacturing same
DE19626293A1 (de) * 1996-07-01 1998-01-08 Teves Gmbh Alfred Ultraschallwandler mit Kontaktglied
EP0825585B1 (de) * 1996-08-21 2005-07-20 Volkswagen Aktiengesellschaft Vorrichtung zur Bestimmung des Abstandes von Objekten
US5982709A (en) * 1998-03-31 1999-11-09 The Board Of Trustees Of The Leland Stanford Junior University Acoustic transducers and method of microfabrication
JP2000050387A (ja) * 1998-07-16 2000-02-18 Massachusetts Inst Of Technol <Mit> パラメトリックオ―ディオシステム
US6775388B1 (en) 1998-07-16 2004-08-10 Massachusetts Institute Of Technology Ultrasonic transducers
US7391872B2 (en) * 1999-04-27 2008-06-24 Frank Joseph Pompei Parametric audio system
JP2003018696A (ja) * 2001-06-29 2003-01-17 Azden Corp エレクトレットコンデンサマイクロホン
WO2003032678A2 (en) 2001-10-09 2003-04-17 Frank Joseph Pompei Ultrasonic transducer for parametric array
US20040114770A1 (en) * 2002-10-30 2004-06-17 Pompei Frank Joseph Directed acoustic sound system
DE10260307B4 (de) * 2002-12-20 2007-02-22 Siemens Audiologische Technik Gmbh Elektroakustischer Miniaturwandler für ein Hörhilfegerät
US7530952B2 (en) * 2004-04-01 2009-05-12 The Board Of Trustees Of The Leland Stanford Junior University Capacitive ultrasonic transducers with isolation posts
JP4642541B2 (ja) * 2005-05-06 2011-03-02 株式会社オーディオテクニカ マイクロホン
JP4618165B2 (ja) * 2006-03-06 2011-01-26 株式会社デンソー 超音波センサ
WO2007115350A1 (en) * 2006-04-10 2007-10-18 Immersion Technology Property Limited An electrostatic loudspeaker
AT509922B1 (de) 2011-06-24 2013-10-15 Avl List Gmbh Kapazitiver ultraschallwandler
EP2858829B1 (en) * 2012-06-12 2021-05-19 Frank Joseph Pompei Ultrasonic transducer
CN203747990U (zh) * 2013-12-11 2014-07-30 瑞声光电科技(常州)有限公司 扬声器
JP6547272B2 (ja) * 2014-10-16 2019-07-24 ヤマハ株式会社 電気音響変換器
US10120449B2 (en) 2015-08-25 2018-11-06 Immersion Corporation Parallel plate actuator
WO2017151878A1 (en) * 2016-03-04 2017-09-08 Frank Joseph Pompei Ultrasonic transducer with tensioned film

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE452961C (de) * 1925-11-12 1927-11-25 Eugen Reisz Resonanzfreie Membran
DE507741C (de) * 1929-01-03 1930-10-06 Gustav Hoffmann Vom Schiessstand aus mittels Seilzuges o. dgl. zu betaetigender Scheibenstand
FR749076A (fr) * 1932-07-16 1933-07-18 Microphone
US3008013A (en) * 1954-07-20 1961-11-07 Ferranti Ltd Electrostatic loudspeakers
GB849487A (en) * 1956-03-14 1960-09-28 Telefunken Gmbh Improvements in or relating to electrostatic sound transducers
US2910539A (en) * 1956-07-27 1959-10-27 William L Hartsfield Microphones
US3041418A (en) * 1960-01-14 1962-06-26 Rca Corp Transducers
NL281794A (it) * 1961-08-07
JPS455746Y1 (it) * 1965-12-28 1970-03-19
US3430146A (en) * 1966-11-02 1969-02-25 Admiral Corp Remote control microphone biasing circuit
JPS4888018U (it) * 1972-01-24 1973-10-24
US3816671A (en) * 1972-04-06 1974-06-11 Thermo Electron Corp Electret transducer cartridge and case
US3814864A (en) * 1972-07-14 1974-06-04 J Victoreen Condenser microphone having a plurality of discrete vibratory surfaces
JPS5121791B2 (it) * 1972-08-04 1976-07-05
JPS50115517A (it) * 1974-02-20 1975-09-10
JPS50115519A (it) * 1974-02-20 1975-09-10
US3958662A (en) * 1975-02-18 1976-05-25 Bell Telephone Laboratories, Incorporated Tensioned diaphragm mounting for an electroacoustic transducer

Also Published As

Publication number Publication date
JPS5362519A (en) 1978-06-05
FR2371115A1 (fr) 1978-06-09
ATA793277A (de) 1982-10-15
US4081626A (en) 1978-03-28
AU513326B2 (en) 1980-11-27
DE2749987B2 (de) 1980-09-04
AU2904577A (en) 1979-03-29
FR2371115B1 (it) 1981-10-23
CA1119710A (en) 1982-03-09
CH626763A5 (it) 1981-11-30
DE2749987C3 (de) 1981-04-16
JPS552800B2 (it) 1980-01-22
AT371257B (de) 1983-06-10
DE2749987A1 (de) 1978-05-18
GB1589446A (en) 1981-05-13

Similar Documents

Publication Publication Date Title
IT1088489B (it) Trasduttore sonico elettrostatico
DK416277A (da) Elektro-akustisk transducer
IT1072762B (it) Trasduttore ultrasonico
DK153608C (da) Piezo-elektrisk transducer
MX148756A (es) Transductor ultrasonico mejorado
FR2306592A1 (fr) Transducteur ultrasonore
IT1055287B (it) Transduttori
FR2462837B1 (fr) Transducteur ultrasonore
SE7710241L (sv) Ljuddempat skerorgan
FR2332525A1 (fr) Transducteur
FR2472899B1 (fr) Transducteur electro-acoustique
DK581977A (da) Magnetisk transducer
ATA467577A (de) Kraftaufnehmer
BR7902346A (pt) Transdutor
IT1086574B (it) Trasduttore acustico elettrodinamico
FR2289089A1 (fr) Transducteur electrostatique
IT1057208B (it) Trasduttore elettroacustico
BE863315A (fr) Transducteur
BR8005981A (pt) Transdutor piezoeletrico
BE855622A (fr) Ultrasons
FR2309105A1 (fr) Transducteurs piezoelectriques sous-marins
IT1080558B (it) Trasduttore elettroacustico
AT383682B (de) Kraftmesswandler
FR2340013A1 (fr) Transducteur acoustique electromagnetique
BR8005910A (pt) Transdutores eletroacusticos