Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1998-12-11
2000-12-26
Martin, David
Acoustics
Anatomic or prosthetic relation
Ear and mouth
181130, 181134, 381322, 381324, 381325, 381328, 128864, 128865, 128867, A61B 702
Patent
active
061644099
ABSTRACT:
A non porous wax guard for an in-the-canal hearing aid is in the form of a membrane or diaphragm which completely covers the mouth of the round or other shape outlet of the hearing aid. The membrane is made of plastic or metalized plastic, or stainless steel, having a diameter of between 0.20 inches and 3/8 inch, and a thickness of between 0.0005 inches and 0.001 inches. The membrane is affixed to the mouth of the sound outlet by a number of methods. It may be attached to a thin ring of plastic material, and attached with a spring clip to a recess in the sound outlet. It may simply be bonded, by adhesive or heat bonding, to the recess. It may be affixed to a cylindrical mount, and press-fit into the port. Or, as an alternative, the cylindrical mount may be threaded, and mated with an internal thread cut into the sound outlet. Although wax may build up externally on the membrane, it may be easily removed with a wipe of a tissue, whereas, without the wax guard, the sound outlet itself must be cleaned with an instrument or other device, risking damage to the hearing aid or requiring a hearing aid professional to do the cleaning.
REFERENCES:
patent: 4972488 (1990-11-01), Weiss et al.
patent: 4987597 (1991-01-01), Haertl
patent: 5278360 (1994-01-01), Carbe et al.
patent: 5712918 (1998-01-01), Yoest
patent: 5748743 (1998-05-01), Weeks
Dang Khanh
Martin David
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