GB1033001A - Electroacoustic transducers - Google Patents

Electroacoustic transducers

Info

Publication number
GB1033001A
GB1033001A GB19468/63A GB1946863A GB1033001A GB 1033001 A GB1033001 A GB 1033001A GB 19468/63 A GB19468/63 A GB 19468/63A GB 1946863 A GB1946863 A GB 1946863A GB 1033001 A GB1033001 A GB 1033001A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
electrodes
rings
temperature
aluminium
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
GB19468/63A
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.)
AT&T Corp
Original Assignee
Western Electric Co 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
Priority claimed from US129629A external-priority patent/US3118979A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1033001A publication Critical patent/GB1033001A/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
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/025—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • 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
    • 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
    • Y10S55/00—Gas separation
    • Y10S55/39—Electrets separator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

1,033,001. Electrostatic transducers. WESTERN ELECTRIC CO. Inc. May 16, 1963 [May 22, 1962], No. 19468/63. Heading H4J. An electrostatic transducer comprises two plane conductive electrodes 15, 16 between which a multi-layer permanently polarized diaphragm 10 is free to vibrate. In the telephone receiver described, brass electrodes 15, 16 having mutually aligned holes therein are restrained between rings 25, 26 by means of adjustment rings 17, 18 and rubber rings 20, 21 located in aluminium clamping members 11, 12 and the diaphragm is clamped at its periphery by the groove and socket arrangement 13, 14. The diaphragm which is of the type described in Specification 1,014,781, consists of several layers of polyethylene terephthalate at least one of which is coated with aluminium and it is prepolarized by supporting it between electrodes carrying a potential of 3500 volts and subjecting it to a temperature of 120‹ C. for 15 minutes after which the temperature is gradually reduced to room temperature. The resultant electret has a polarization equivalent to that produced by a 200 volt bias supply. The electrodes are fed from a push-pull signal source, the diaphragm being connected to a neutral point of the source. A suitable balanced circuit configuration (transformer/ capacitor bridge) is depicted in Fig. 4 (not shown). ). The use of such a transducer as a highfrequency tweeter is also discussed.
GB19468/63A 1961-08-07 1963-05-16 Electroacoustic transducers Expired GB1033001A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US129629A US3118979A (en) 1961-08-07 1961-08-07 Electrostatic transducer
US196670A US3118022A (en) 1961-08-07 1962-05-22 Electroacoustic transducer

Publications (1)

Publication Number Publication Date
GB1033001A true GB1033001A (en) 1966-06-15

Family

ID=26827772

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19468/63A Expired GB1033001A (en) 1961-08-07 1963-05-16 Electroacoustic transducers

Country Status (3)

Country Link
US (1) US3118022A (en)
DE (1) DE1437486B2 (en)
GB (1) GB1033001A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102798852A (en) * 2011-05-25 2012-11-28 罗伯特·博世有限公司 Sound wave based sensor

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247401B (en) * 1964-10-24 1967-08-17 Tesla Np Electret microphone and its assembly method
US3497642A (en) * 1966-02-28 1970-02-24 Intron Int Inc Transducer diaphragm imbedded with conductively-coated ferromagnetic particles
USRE28420E (en) * 1967-05-15 1975-05-13 Blbctret acoustic transducer
US3612778A (en) * 1967-05-15 1971-10-12 Thermo Electron Corp Electret acoustic transducer and method of making
JPS4840084B1 (en) * 1969-11-19 1973-11-28
US3668417A (en) * 1970-12-28 1972-06-06 Bell Telephone Labor Inc Touch-sensitive switch employing electret foil
JPS5632839B1 (en) * 1971-03-11 1981-07-30
US3736552A (en) * 1971-07-27 1973-05-29 Bell Telephone Labor Inc Acoustic imaging device using multiple element electret transducer
SE362571B (en) * 1971-12-02 1973-12-10 Ericsson Telefon Ab L M
US3760126A (en) * 1972-04-17 1973-09-18 Gte Sylvania Inc Electret phonograph pickup
JPS5223333Y2 (en) * 1972-06-17 1977-05-27
US3778561A (en) * 1972-06-21 1973-12-11 Bell Canada Northern Electric Electret microphone
DE2330800C3 (en) * 1973-06-16 1981-10-01 Sennheiser Electronic Kg, 3002 Wedemark Electroacoustic transducer based on the electrostatic principle and process for its manufacture
JPS5419172B2 (en) * 1973-07-23 1979-07-13
US3896274A (en) * 1973-10-04 1975-07-22 Thermo Electron Corp Electret earphone
JPS5910046B2 (en) * 1977-03-28 1984-03-06 新田ベルト株式会社 Charge retention structure of electrified air filter media
US4513049A (en) * 1983-04-26 1985-04-23 Mitsui Petrochemical Industries, Ltd. Electret article
US4524247A (en) * 1983-07-07 1985-06-18 At&T Bell Laboratories Integrated electroacoustic transducer with built-in bias
US4533795A (en) * 1983-07-07 1985-08-06 American Telephone And Telegraph Integrated electroacoustic transducer
FR2563959B1 (en) * 1984-05-04 1990-08-10 Lewiner Jacques IMPROVEMENTS ON ELECTRE-ACOUSTIC TRANSDUCERS WITH ELECTRET
US5570428A (en) * 1994-09-27 1996-10-29 Tibbetts Industries, Inc. Transducer assembly
US6513184B1 (en) 2000-06-28 2003-02-04 S. C. Johnson & Son, Inc. Particle entrapment system
US6550639B2 (en) 2000-12-05 2003-04-22 S.C. Johnson & Son, Inc. Triboelectric system
WO2002073673A1 (en) * 2001-03-13 2002-09-19 Rochester Institute Of Technology A micro-electro-mechanical switch and a method of using and making thereof
JP2002345092A (en) * 2001-05-15 2002-11-29 Citizen Electronics Co Ltd Manufacturing method for condenser microphone
US7195393B2 (en) * 2001-05-31 2007-03-27 Rochester Institute Of Technology Micro fluidic valves, agitators, and pumps and methods thereof
US7211923B2 (en) 2001-10-26 2007-05-01 Nth Tech Corporation Rotational motion based, electrostatic power source and methods thereof
US7378775B2 (en) * 2001-10-26 2008-05-27 Nth Tech Corporation Motion based, electrostatic power source and methods thereof
WO2003047307A2 (en) * 2001-11-27 2003-06-05 Corporation For National Research Initiatives A miniature condenser microphone and fabrication method therefor
US7217582B2 (en) * 2003-08-29 2007-05-15 Rochester Institute Of Technology Method for non-damaging charge injection and a system thereof
US7287328B2 (en) * 2003-08-29 2007-10-30 Rochester Institute Of Technology Methods for distributed electrode injection
US8581308B2 (en) * 2004-02-19 2013-11-12 Rochester Institute Of Technology High temperature embedded charge devices and methods thereof
US20070074731A1 (en) * 2005-10-05 2007-04-05 Nth Tech Corporation Bio-implantable energy harvester systems and methods thereof
US9285930B2 (en) 2007-05-09 2016-03-15 Wacom Co., Ltd. Electret stylus for touch-sensor device
US8081784B2 (en) * 2007-09-04 2011-12-20 Industrial Technology Research Institute Electrostatic electroacoustic transducers
EP2220875A4 (en) * 2007-11-20 2013-10-30 Cochlear Ltd Implantable electret microphone
US7514626B1 (en) 2007-12-14 2009-04-07 John Jerome Snyder Method and apparatus for electrostatic pickup for stringed musical instruments
US8901943B1 (en) 2008-05-13 2014-12-02 Ronald J. Kita Gravitational attenuating material
US8855350B2 (en) * 2009-04-28 2014-10-07 Cochlear Limited Patterned implantable electret microphone
FR2954626B1 (en) 2009-12-23 2013-12-06 Commissariat Energie Atomique ACOUSTIC RESONATOR COMPRISING AN ELECTRET, AND METHOD OF MANUFACTURING THE RESONATOR, APPLICATION TO SWITCHABLE FILTERS WITH COUPLED RESONATORS
WO2011123552A1 (en) 2010-03-30 2011-10-06 Otologics, Llc Low noise electret microphone
AT509922B1 (en) * 2011-06-24 2013-10-15 Avl List Gmbh CAPACITIVE ULTRASOUND TRANSFORMER
US9788093B2 (en) 2014-08-06 2017-10-10 Nokia Technologies Oy Audio transducer electrical connectivity
CN104768111B (en) * 2015-03-31 2018-01-30 歌尔股份有限公司 Suppress the speaker unit and adjustment vibrating diaphragm equilbrium position and pliable method of polarization
DE102015111527A1 (en) 2015-07-16 2017-01-19 Lofelt Gmbh Vibrating actuator
DE102016108690A1 (en) 2016-05-11 2017-11-16 Lofelt Gmbh Vibrating actuator
USD867346S1 (en) * 2018-01-19 2019-11-19 Dynamic Ear Company B.V. Ambient filter
EP4074071A1 (en) 2019-12-11 2022-10-19 Lofelt GmbH Linear vibration actuator having moving coil and moving magnet
US11558695B2 (en) 2020-03-31 2023-01-17 Shure Acquisition Holdings, Inc. Condenser microphone pattern adjustment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB348573A (en) * 1930-02-12 1931-05-12 Albert Rauser Improvements relating to electrostatic loud-speakers
BE464634A (en) * 1946-01-22 S E M S A R L Ets
GB838021A (en) * 1956-10-11 1960-06-22 Pye Ltd Improvements in electrostatic loudspeakers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102798852A (en) * 2011-05-25 2012-11-28 罗伯特·博世有限公司 Sound wave based sensor
GB2491257A (en) * 2011-05-25 2012-11-28 Bosch Gmbh Robert Sound wave based sensor
GB2491257B (en) * 2011-05-25 2015-02-18 Bosch Gmbh Robert Sound wave based sensor

Also Published As

Publication number Publication date
DE1437486B2 (en) 1971-05-19
DE1437486A1 (en) 1969-05-29
US3118022A (en) 1964-01-14

Similar Documents

Publication Publication Date Title
GB1033001A (en) Electroacoustic transducers
US3300585A (en) Self-polarized electrostatic microphone-semiconductor amplifier combination
US3894199A (en) Electret electrostatic electroacoustic transducer
KR840007501A (en) Speaker unit
US2920140A (en) Electrostatic microphone circuits
US2387845A (en) Electroacoustic transducer
GB1504971A (en) Electrostatic type electroacoustic transducer
GB1445220A (en) Microphone
GB832276A (en) Improvements in or relating to electro-acoustic transducers
GB782549A (en) Electrostatic transducer
US3113288A (en) Supersensitive shielded crystal hydrophone
ES422079A1 (en) Loud speakers
GB1212752A (en) Telephone subset with resistive hybrid network
GB1003835A (en) Improvements in or relating to condenser microphones
US3110770A (en) Apparatus for use in stethoscopy
US1422877A (en) Acoustical aid for deaf persons
US2396691A (en) Condenser transmitter-amplifier system
GB1330968A (en) Earphones
US2686847A (en) Directional transducer
US2796467A (en) Directional transducer
GB942459A (en) Improvements relating to apparatus for deriving pseudostereophonic signals
US2393318A (en) Microphone
US3066187A (en) Amplitude control circuit for stereophonic reproducers
GB1233457A (en)
SU106608A1 (en) Method of matching single-element unidirectional (cardioid) condenser microphone characteristics