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EP0132039A3 - Moisture resistant cover for an electroacoustic transducer - Google Patents

Moisture resistant cover for an electroacoustic transducer Download PDF

Info

Publication number
EP0132039A3
EP0132039A3 EP84303836A EP84303836A EP0132039A3 EP 0132039 A3 EP0132039 A3 EP 0132039A3 EP 84303836 A EP84303836 A EP 84303836A EP 84303836 A EP84303836 A EP 84303836A EP 0132039 A3 EP0132039 A3 EP 0132039A3
Authority
EP
European Patent Office
Prior art keywords
moisture resistant
electroacoustic transducer
resistant cover
acoustic waves
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.)
Withdrawn
Application number
EP84303836A
Other languages
German (de)
French (fr)
Other versions
EP0132039A2 (en
Inventor
Robert Bacon Pepper
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0132039A2 publication Critical patent/EP0132039A2/en
Publication of EP0132039A3 publication Critical patent/EP0132039A3/en
Withdrawn legal-status Critical Current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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

A capacitive type electroacoustic transducer is provided with a moisture resistant layer (34) to allow use of the transd­ ucer in wet environments. The moisture resistant layer is fastened over a protective cover (18) and is located at a node of the acoustic waves emitted by the transducer. A woven polytetrafluoroethylene material is preferably used for the moisture resistant properties as well as minimum attenuation of the acoustic waves.
EP84303836A 1983-06-09 1984-06-06 Moisture resistant cover for an electroacoustic transducer Withdrawn EP0132039A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US50277083A 1983-06-09 1983-06-09
US502770 1983-06-09

Publications (2)

Publication Number Publication Date
EP0132039A2 EP0132039A2 (en) 1985-01-23
EP0132039A3 true EP0132039A3 (en) 1986-07-23

Family

ID=23999340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84303836A Withdrawn EP0132039A3 (en) 1983-06-09 1984-06-06 Moisture resistant cover for an electroacoustic transducer

Country Status (1)

Country Link
EP (1) EP0132039A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872148A (en) * 1984-03-08 1989-10-03 Polaroid Corporation Ultrasonic transducer for use in a corrosive/abrasive environment
FR2683969B1 (en) * 1991-11-15 1997-06-20 Thomson Csf SEALING MEMBRANE FOR UNDERWATER DEVICE, PARTICULARLY FOR UNDERWATER ACOUSTIC DEVICE, AND DEVICE COMPRISING SUCH A MEMBRANE.
AU1738695A (en) * 1994-02-03 1995-08-21 Knowles Electronics, Inc. Water submersible microphone

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311703A (en) * 1963-05-21 1967-03-28 Carl E Grinstead Microphone with low frequency filter
US3944756A (en) * 1975-03-05 1976-03-16 Electro-Voice, Incorporated Electret microphone
US4081626A (en) * 1976-11-12 1978-03-28 Polaroid Corporation Electrostatic transducer having narrowed directional characteristic
GB2015299A (en) * 1978-02-20 1979-09-05 Hosiden Electronics Co Electret microphone
GB1559214A (en) * 1977-12-20 1980-01-16 Brown Communications Ltd Sg Protection of devices against immersion
GB2064263A (en) * 1979-11-30 1981-06-10 Pye Electronic Prod Ltd Microphone unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311703A (en) * 1963-05-21 1967-03-28 Carl E Grinstead Microphone with low frequency filter
US3944756A (en) * 1975-03-05 1976-03-16 Electro-Voice, Incorporated Electret microphone
US4081626A (en) * 1976-11-12 1978-03-28 Polaroid Corporation Electrostatic transducer having narrowed directional characteristic
GB1559214A (en) * 1977-12-20 1980-01-16 Brown Communications Ltd Sg Protection of devices against immersion
GB2015299A (en) * 1978-02-20 1979-09-05 Hosiden Electronics Co Electret microphone
GB2064263A (en) * 1979-11-30 1981-06-10 Pye Electronic Prod Ltd Microphone unit

Also Published As

Publication number Publication date
EP0132039A2 (en) 1985-01-23

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Legal Events

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Effective date: 19850722

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Effective date: 19870124