FR70574E - Improvements to electrostatic loudspeakers - Google Patents

Improvements to electrostatic loudspeakers

Info

Publication number
FR70574E
FR70574E FR70574DA FR70574E FR 70574 E FR70574 E FR 70574E FR 70574D A FR70574D A FR 70574DA FR 70574 E FR70574 E FR 70574E
Authority
FR
France
Prior art keywords
electrostatic loudspeakers
loudspeakers
electrostatic
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
Other languages
French (fr)
Inventor
Peter James Walker
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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
Priority claimed from GB2107054A external-priority patent/GB815978A/en
Application filed by Ferranti PLC filed Critical Ferranti PLC
Application granted granted Critical
Publication of FR70574E publication Critical patent/FR70574E/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
    • H04R19/00—Electrostatic transducers
    • H04R19/02—Loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR70574D 1954-07-20 1956-10-10 Improvements to electrostatic loudspeakers Expired FR70574E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2107054A GB815978A (en) 1954-07-20 Improvements relating to electrostatic loudspeakers

Publications (1)

Publication Number Publication Date
FR70574E true FR70574E (en) 1959-05-29

Family

ID=10156690

Family Applications (2)

Application Number Title Priority Date Filing Date
FR1134837D Expired FR1134837A (en) 1954-07-20 1955-07-18 Improvements to electrostatic loudspeakers
FR70574D Expired FR70574E (en) 1954-07-20 1956-10-10 Improvements to electrostatic loudspeakers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR1134837D Expired FR1134837A (en) 1954-07-20 1955-07-18 Improvements to electrostatic loudspeakers

Country Status (3)

Country Link
US (2) US3008013A (en)
DE (2) DE1088546B (en)
FR (2) FR1134837A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135838A (en) * 1958-12-10 1964-06-02 Wright St George Lab Inc Electrostatic loudspeaker

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US3403234A (en) * 1964-09-11 1968-09-24 Northrop Corp Acoustic transducer
US3389226A (en) * 1964-12-29 1968-06-18 Gen Electric Electrostatic loudspeaker
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US3422324A (en) * 1967-05-17 1969-01-14 Webb James E Pressure variable capacitor
US3562429A (en) * 1968-04-29 1971-02-09 Teachout West Electro Acoustic Sound transmitter with feedback and polarization circuitry
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US3668336A (en) * 1969-12-08 1972-06-06 Dayton Wright Associates Ltd Audio system including electrostatic loudspeaker
US3783202A (en) * 1971-01-07 1974-01-01 Pond C Speaker system and electrostatic speaker
JPS5632839B1 (en) * 1971-03-11 1981-07-30
US3859477A (en) * 1971-06-24 1975-01-07 Tesla Np Electrostatic transducer
AT323823B (en) * 1973-06-19 1975-07-25 Akg Akustische Kino Geraete SOUND TRANSMITTERS ACCORDING TO THE TWO-WAY SYSTEM, IN PARTICULAR FOR HEADPHONES
US3778562A (en) * 1973-10-21 1973-12-11 Dayton Wright Ass Ltd Electrostatic loudspeaker having acoustic wavefront modifying device
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US4006317A (en) * 1975-02-14 1977-02-01 Freeman Miller L Electrostatic transducer and acoustic and electric signal integrator
US4081626A (en) * 1976-11-12 1978-03-28 Polaroid Corporation Electrostatic transducer having narrowed directional characteristic
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DE3003178C2 (en) * 1980-01-30 1983-08-04 Sennheiser Electronic Kg, 3002 Wedemark Electroacoustic converter based on the electrostatic principle
US4330691A (en) * 1980-01-31 1982-05-18 The Futures Group, Inc. Integral ceiling tile-loudspeaker system
JPS57125600A (en) * 1981-02-21 1982-08-04 Bulgarsko Radio Electrostatic acoustic converter
US5054081B1 (en) * 1985-04-02 1994-06-28 Roger A West Electrostatic transducer with improved bass response utilizing distributed bass resonance energy
US4703509A (en) * 1985-06-19 1987-10-27 Zavod Za Elektronni Preobrazuvatelni Elementi Electrostatic acoustic converter with stationary electrode having a progressively increasing surface resistance
NL8601772A (en) * 1986-07-08 1988-02-01 Philips Nv DEVICE FOR CONVERTING AN ELECTRIC SIGNAL TO AN ACOUSTIC SIGNAL, INCLUDING AN ELECTROSTATIC CONVERTER.
KR880004711A (en) * 1986-09-30 1988-06-07 임경춘 Piezoelectric Film Speaker Stereo System
US5206557A (en) * 1990-11-27 1993-04-27 Mcnc Microelectromechanical transducer and fabrication method
US5479061A (en) * 1992-12-31 1995-12-26 University Of North Carolina Pleated sheet microelectromechanical transducer
FI104611B (en) * 1993-06-21 2000-02-29 Panphonics Oy Pleated energy converter
US5434464A (en) * 1994-05-23 1995-07-18 Mcnc Unidirectional supporting structure for microelectromechanical transducers
FI116873B (en) * 1996-02-26 2006-03-15 Panphonics Oy Acoustic element and sound processing method
US6304662B1 (en) 1998-01-07 2001-10-16 American Technology Corporation Sonic emitter with foam stator
US20020076069A1 (en) * 1998-01-07 2002-06-20 American Technology Corporation Sonic emitter with foam stator
US6188772B1 (en) * 1998-01-07 2001-02-13 American Technology Corporation Electrostatic speaker with foam stator
US6175636B1 (en) * 1998-06-26 2001-01-16 American Technology Corporation Electrostatic speaker with moveable diaphragm edges
US20050100181A1 (en) * 1998-09-24 2005-05-12 Particle Measuring Systems, Inc. Parametric transducer having an emitter film
US6850623B1 (en) 1999-10-29 2005-02-01 American Technology Corporation Parametric loudspeaker with improved phase characteristics
FI116605B (en) * 1999-11-05 2005-12-30 Panphonics Oy Acoustic element
JP2002135896A (en) * 2000-10-25 2002-05-10 Sony Corp Speaker device
US7142688B2 (en) * 2001-01-22 2006-11-28 American Technology Corporation Single-ended planar-magnetic speaker
US6934402B2 (en) * 2001-01-26 2005-08-23 American Technology Corporation Planar-magnetic speakers with secondary magnetic structure
US6760462B1 (en) 2003-01-09 2004-07-06 Eminent Technology Incorporated Planar diaphragm loudspeakers with non-uniform air resistive loading for low frequency modal control
US7889877B2 (en) * 2003-06-30 2011-02-15 Nxp B.V. Device for generating a medium stream
WO2005043771A1 (en) 2003-10-23 2005-05-12 American Technology Corporation Method of adusting linear parameters of a parametric ultrasonic signal to reduce non-linearities in decoupled audio output waves and system including same
DE102004048990A1 (en) * 2004-10-04 2006-04-06 Volkswagen Ag Speaker arrangement in a motor vehicle
WO2007115358A1 (en) * 2006-04-10 2007-10-18 Immersion Technology Property Limited An electrostatic loudspeaker
US8670581B2 (en) 2006-04-14 2014-03-11 Murray R. Harman Electrostatic loudspeaker capable of dispersing sound both horizontally and vertically
US8184832B2 (en) * 2006-04-14 2012-05-22 Harman Murray R Electrostatic loudspeaker capable of dispersing sound both horizontally and vertically
US8275137B1 (en) 2007-03-22 2012-09-25 Parametric Sound Corporation Audio distortion correction for a parametric reproduction system
ATE498977T1 (en) * 2007-11-13 2011-03-15 Akg Acoustics Gmbh MICROPHONE ARRANGEMENT
EP2262277B1 (en) * 2007-11-13 2012-01-04 AKG Acoustics GmbH Microphone arrangement
CN101911722B (en) * 2007-11-13 2013-10-30 Akg声学有限公司 Microphone arrangement, having two pressure gradient transducers
US8184833B2 (en) * 2007-12-14 2012-05-22 Sony Ericsson Mobile Communications Ab Electrostatic speaker arrangement for a mobile device
TWI350116B (en) * 2007-12-18 2011-10-01 Princeton Technology Corp Audio playing module and method of the same
WO2009105793A1 (en) * 2008-02-26 2009-09-03 Akg Acoustics Gmbh Transducer assembly
JP5825737B2 (en) 2010-06-14 2015-12-02 パラメトリック サウンド コーポレーション Parametric signal processing / radiation system and related methods
US8831248B2 (en) * 2010-08-04 2014-09-09 Nokia Corporation Apparatus with directivity pattern
WO2013106596A1 (en) 2012-01-10 2013-07-18 Parametric Sound Corporation Amplification systems, carrier tracking systems and related methods for use in parametric sound systems
WO2013158298A1 (en) 2012-04-18 2013-10-24 Parametric Sound Corporation Parametric transducers related methods
US8934650B1 (en) 2012-07-03 2015-01-13 Turtle Beach Corporation Low profile parametric transducers and related methods
US20140247955A1 (en) * 2013-03-04 2014-09-04 Sony Corporation Folded electrostatic speaker
US8903104B2 (en) 2013-04-16 2014-12-02 Turtle Beach Corporation Video gaming system with ultrasonic speakers
US8988911B2 (en) 2013-06-13 2015-03-24 Turtle Beach Corporation Self-bias emitter circuit
US9332344B2 (en) 2013-06-13 2016-05-03 Turtle Beach Corporation Self-bias emitter circuit
WO2015027168A1 (en) * 2013-08-23 2015-02-26 Google Inc. Method and system for speech intellibility enhancement in noisy environments
FR3027762B1 (en) * 2014-10-27 2018-01-19 Universite Du Maine ELECTROACOUSTIC TRANSDUCER, ASSEMBLY AND SYSTEM THEREFOR
WO2016127119A1 (en) * 2015-02-06 2016-08-11 Clean Energy Labs, Llc Loudspeaker having electrically conductive membrane transducers
US9602930B2 (en) * 2015-03-31 2017-03-21 Qualcomm Incorporated Dual diaphragm microphone
US10231060B2 (en) * 2015-12-23 2019-03-12 Sennheiser Electronic Gmbh & Co. Kg Electrostatic headphones

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DE368900C (en) * 1921-11-28
GB222507A (en) * 1924-09-29 1925-10-15 Hermann Meusser Improvements in or relating to electric condensers
FR613417A (en) * 1925-03-31 1926-11-17
US1622039A (en) * 1925-05-02 1927-03-22 Frederick W Lee Apparatus for and method of reproducing sound
US1631583A (en) * 1926-02-12 1927-06-07 Ignatz Lauter Capacitatively-actuated loud speaker
DE531299C (en) * 1928-01-14 1931-08-07 Vogt Hans Method of manufacturing the solid capacitor plates for electrostatic telephones and microphones
GB322744A (en) * 1928-09-10 1929-12-10 Vogt Hans Improvements in condenser telephones
US1881107A (en) * 1928-05-16 1932-10-04 Vogt Hans Sounding condenser
US1762981A (en) * 1928-06-06 1930-06-10 Bell Telephone Labor Inc Acoustic device
BE373730A (en) * 1929-09-27
DE573873C (en) * 1929-10-30 1933-04-06 Albert Rauser Electrostatic loudspeaker with a membrane polarized by a bias voltage
GB348573A (en) * 1930-02-12 1931-05-12 Albert Rauser Improvements relating to electrostatic loud-speakers
DE581339C (en) * 1931-04-30 1933-07-26 Vogt Hans Circuit arrangement for the connection of several different frequency ranges preferring roaring capacitors
US1930518A (en) * 1930-07-30 1933-10-17 Westinghouse Electric & Mfg Co Electrostatic loud speaker
GB370248A (en) * 1931-06-01 1932-04-07 Albert Rauser Improvements in electrostatic loud-speakers
BE464634A (en) * 1946-01-22 S E M S A R L Ets
US2631196A (en) * 1949-10-05 1953-03-10 Arthur A Janszen Electrostatic loud-speaker
US2796467A (en) * 1951-12-12 1957-06-18 Bell Telephone Labor Inc Directional transducer
US2855467A (en) * 1953-12-11 1958-10-07 Curry Electronics Inc Loud speakers
US2864899A (en) * 1954-11-29 1958-12-16 Henry W Parker Transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135838A (en) * 1958-12-10 1964-06-02 Wright St George Lab Inc Electrostatic loudspeaker

Also Published As

Publication number Publication date
US3008013A (en) 1961-11-07
FR1134837A (en) 1957-04-18
US3008014A (en) 1961-11-07
DE1088546B (en) 1960-09-08
DE1139548B (en) 1962-11-15

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