Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent
1988-10-03
1991-01-22
Isen, Forester W.
Electrical audio signal processing systems and devices
Sound effects
Reverberators
H04R 2500
Patent
active
049875973
ABSTRACT:
An apparatus for closing an opening of a hearing aid or an ear adaptor for a hearing aid, particularly openings such as sound entry openings, sound exit openings and aeration openings utilizes a micro-porous membrane of an anti-adhesive material which is introduced into the respective opening. Preferably, the membrane is polytetrafluoroethylene material.
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Isen Forester W.
Siemens Aktiengesellschaft
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