ATTENUATING TIP FOR HEARING AID

摘要

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.

主权项

1. A hearing aid including an earpiece, wherein the earpiece is located in an ear canal during use, characterized in that the earpiece includes:
a coupling containing a speaker; a retainer that mechanically engages the coupling, the retainer being formed separately from the coupling, and the retainer being formed of a composite material including an organic carrier and an inorganic filler; and a sleeve axially surrounding the retainer, the sleeve being formed of foam rubber; wherein said retainer and said sleeve attenuate different ranges of audio frequency.