(19)
(11) EP 0 132 039 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.07.1986 Bulletin 1986/30

(43) Date of publication A2:
23.01.1985 Bulletin 1985/04

(21) Application number: 84303836

(22) Date of filing: 06.06.1984
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 09.06.1983 US 502770

(71) Applicant: Pepper, Robert Bacon
 ()

(72) Inventor:
  • Pepper, Robert Bacon
     ()

   


(54) Moisture resistant cover for an electroacoustic transducer


(57) A capacitive type electroacoustic transducer is provided with a moisture resistant layer (34) to allow use of the transducer 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.






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