FILTER FOR A HEARING AID AND A HEARING AID
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United States of America Patent
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app pub date -
Mar 9, 2012
filing date -
Aug 31, 2006
priority date (Note) -
Abandoned
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Abstract
A hearing aid (1) comprises a receiver (19), an output port (6), a conduit (13) for conveying sound to the port and a barrier element (39) adapted for baffling entry of ear wax and moisture and for being acoustically transparent. The invention further provides a barrier element (39) for a hearing aid comprising a slab having an exterior surface and through openings for transverse transmission of sound, wherein the exterior surface is super-hydrophobic.
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