Attenuating tip for hearing aid
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United States of America Patent
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Oct 28, 2014
Issued Date -
N/A
app pub date -
Dec 11, 2007
filing date -
Dec 11, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A hearing aid includes a speaker in a tip that is located in an ear canal. The tip includes a coupling, a retainer that mechanically engages the coupling, and a sleeve axially surrounding the retainer. The retainer attenuates lower frequencies than are attenuated by the sleeve. The sleeve is preferably a foam rubber and the retainer is preferably a composite material. A flange on the retainer reflects sound back into the sleeve for additional attenuation. It has been discovered that operation is improved if the outside diameter of the sleeve and the outside diameter of the retainer are in the ratio of approximately 1.75:1.
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