Encapsulated backplate for electret transducers

Details Encapsulated backplate for electret transducers Encapsulated backplate for electret transducers

1982-06-24

1984-04-10

Pellinen, A. D.

H04R 1900

Patent

active

044423241

ABSTRACT:
Electrically conductive sheets comprising backplates for electret transducers are substantially encapsulated with hydrophobic electrically insulating coatings. The coatings are melt bonded to both faces of the sheets and to the edges of the sheet periphery. Likewise, the coatings are melt bonded to the interior edges of acoustic apertures in the sheets.

REFERENCES:
patent: 3772133 (1973-11-01), Schmitt
patent: 3967027 (1976-06-01), Igarashi et al.
patent: 4014091 (1977-03-01), Kochero et al.
patent: 4302633 (1981-11-01), Tamamura et al.

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