GB1352407A - Electrostatic electroacoustic transducer - Google Patents

Electrostatic electroacoustic transducer

Info

Publication number
GB1352407A
GB1352407A GB3313871A GB3313871A GB1352407A GB 1352407 A GB1352407 A GB 1352407A GB 3313871 A GB3313871 A GB 3313871A GB 3313871 A GB3313871 A GB 3313871A GB 1352407 A GB1352407 A GB 1352407A
Authority
GB
United Kingdom
Prior art keywords
films
electrodes
film
conductive
july
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
GB3313871A
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Publication of GB1352407A publication Critical patent/GB1352407A/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
    • H04R19/013—Electrostatic transducers characterised by the use of electrets for loudspeakers
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges

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 Transducers For Audible Bands (AREA)

Abstract

1352407 Audio transducers PIONEER ELECTRONIC CORP 14 July 1971 [14 July 1970] 33138/71 Heading H4J An electrostatic electroacoustic transducer includes at least one fixed electrode and at least two vibratory film electrodes arranged to vibrate in different frequency ranges. The preferred form (as shown expanded) comprises two fixed electrodes each comprised by an electret disc 13, 16 surrounded by a polyethylene or polyurethane gasket 12, 17 and backed by a conductive plate 11, 18. Between the fixed electrodes are two frames 14, 15 carrying on their adjacent faces vibratory films 141, 151 forming the moving electrodes. The film 141 is 5 to 15 microns thick and is held under low tension so as to have a low natural vibration frequency while the film 151 is from one to ten microns thick and under higher tension to have a higher natural frequency of vibration. The films are conductive or have their surfaces rendered conductive. Various materials for the films and constituents of the fixed electrodes are given. The transducer is particularly suitable for use in headphones.
GB3313871A 1970-07-14 1971-07-14 Electrostatic electroacoustic transducer Expired GB1352407A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970069759U JPS4912598Y1 (en) 1970-07-14 1970-07-14

Publications (1)

Publication Number Publication Date
GB1352407A true GB1352407A (en) 1974-05-08

Family

ID=13412034

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3313871A Expired GB1352407A (en) 1970-07-14 1971-07-14 Electrostatic electroacoustic transducer

Country Status (6)

Country Link
US (1) US3821492A (en)
JP (1) JPS4912598Y1 (en)
CA (1) CA953017A (en)
DE (1) DE2134706B2 (en)
FR (1) FR2100906B1 (en)
GB (1) GB1352407A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145301A (en) * 1983-08-19 1985-03-20 Lectret Sa An acoustic transducer and a method for making it
TWI483623B (en) * 2012-09-14 2015-05-01 Fortune Grand Technology Inc Speaker unit
CN106028228A (en) * 2016-07-25 2016-10-12 山东共达电声股份有限公司 Vibrating diaphragm and sound equipment provided with same

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA989514A (en) * 1972-09-08 1976-05-18 Loh-Yi Chang Electromechanical transducer and method of making same
US3980838A (en) * 1974-02-20 1976-09-14 Tokyo Shibaura Electric Co., Ltd. Plural electret electroacoustic transducer
US3894243A (en) * 1974-06-06 1975-07-08 Us Navy Polymeric transducer array
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
CA1025994A (en) * 1975-07-08 1978-02-07 Uniroyal Ltd. Electromechanical transducer
US4379951A (en) * 1977-04-20 1983-04-12 Gabr Saad Z M Electro-acoustic transducer means
NL7802688A (en) * 1978-03-13 1979-09-17 Philips Nv DEVICE FOR CONVERSION FROM ACOUSTIC TO ELECTRICAL VIBRATIONS AND VERSIONS, EQUIPPED WITH AT LEAST ONE CONDENSER ELECTRICAL ELEMENT CONNECTED TO AN ELECTRONIC CIRCUIT.
US4207442A (en) * 1978-05-15 1980-06-10 Freeman Miller L Driver circuit for electrostatic transducers
DE3003178C2 (en) * 1980-01-30 1983-08-04 Sennheiser Electronic Kg, 3002 Wedemark Electroacoustic converter based on the electrostatic principle
CH642504A5 (en) * 1981-06-01 1984-04-13 Asulab Sa Hybrid electroacoustic transducer
US4872148A (en) * 1984-03-08 1989-10-03 Polaroid Corporation Ultrasonic transducer for use in a corrosive/abrasive environment
US5054081B1 (en) * 1985-04-02 1994-06-28 Roger A West Electrostatic transducer with improved bass response utilizing distributed bass resonance energy
CA1284837C (en) * 1987-06-18 1991-06-11 Highwood Audio Inc. Audio transducer
ATE355719T1 (en) * 1993-11-14 2006-03-15 Florian Meinhard Koenig MULTI-CHANNEL HEADPHONES WITH CONTROLLED RADIATION CHARACTERISTICS
US20060082158A1 (en) * 2004-10-15 2006-04-20 Schrader Jeffrey L Method and device for supplying power from acoustic energy
TWM344699U (en) * 2008-05-08 2008-11-11 Jetvox Acoustic Corp Dual band coaxial earphone
US8855350B2 (en) * 2009-04-28 2014-10-07 Cochlear Limited Patterned implantable electret microphone
EP2553944A4 (en) * 2010-03-30 2016-03-23 Cochlear Ltd Low noise electret microphone
USD1000422S1 (en) * 2021-04-14 2023-10-03 Crestron Electronics, Inc. Loudspeaker grille

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR34837E (en) * 1927-10-21
DE494221C (en) * 1926-06-05 1930-03-20 Vogt Hans Device for converting acoustic vibrations into electrical and vice versa by means of electrostatic fields

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145301A (en) * 1983-08-19 1985-03-20 Lectret Sa An acoustic transducer and a method for making it
TWI483623B (en) * 2012-09-14 2015-05-01 Fortune Grand Technology Inc Speaker unit
CN106028228A (en) * 2016-07-25 2016-10-12 山东共达电声股份有限公司 Vibrating diaphragm and sound equipment provided with same
CN106028228B (en) * 2016-07-25 2021-06-11 山东共达电声股份有限公司 Vibrating diaphragm and sound equipment with same

Also Published As

Publication number Publication date
US3821492A (en) 1974-06-28
DE2134706A1 (en) 1972-01-20
CA953017A (en) 1974-08-13
JPS4912598Y1 (en) 1974-03-28
DE2134706B2 (en) 1974-04-18
FR2100906A1 (en) 1972-03-24
FR2100906B1 (en) 1975-10-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee