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1. (WO2003076180) PLIANT COATING FOR HEARING AID EARMOLDS

Pub. No.:    WO/2003/076180    International Application No.:    PCT/US2003/007246
Publication Date: Sep 18, 2003 International Filing Date: Mar 7, 2003
IPC: H04R 25/00
Applicants: BRIGHAM YOUNG UNIVERSITY
PITT, William, G.
BUSSELBERG, Peter, D.
Inventors: PITT, William, G.
BUSSELBERG, Peter, D.
Title: PLIANT COATING FOR HEARING AID EARMOLDS
Abstract:
Failure of the acoustic seal in 'in-the-ear' hearing aid earmolds is a principle cause of acoustic feedback. The ongoing development of smaller hearing aids with close proximity between the hearing aid microphone and receiver mandates the highest quality earmold fit. This invention relates eliminates the feedback problem by placing a soft, pliant, and durable hydrogel coating (16) on the earmold (18)____________________________________________ The coating swells after the hearing aid is inserted and, thus, seals off any pathways for acoustic feedback. After removal at night, the earmold dries and returns to its smaller size, ready for insertion the next day.