Method of manufacturing an in-the-ear hearing aid, auxiliary too

Details Method of manufacturing an in-the-ear hearing aid, auxiliary too Method of manufacturing an in-the-ear hearing aid, auxiliary too

1992-09-10

1995-08-08

Woo, Jay H.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

249 55, 264222, 264313, 425 2, 425472, B29C 3340

Patent

active

054400821

ABSTRACT:
In a method of manufacturing an in-the-ear hearing aid (25), a mould (23) is made of an ear canal for use as a moulding die for making a housing of the hearing aid. After the mould is made an auxiliary tool made up of a flexible tube (11) with a flange at one end is inserted into the ear canal into the proximity of the tympanic membrane of the ear. Subsequently, a curable material (19) is introduced into the ear canal. The material presses the flange against the tympanic membrane, which precludes the ingress of material between the flange and the tympanic membrane. After the material has cured the mould with the tube and the flange is removed from the ear canal. During removal of the mould the space between the tympanic membrane and the mould is in communication with the outer air via the tube, so that no partial vacuum is produced which otherwise might damage the tympanic membrane. The mould obtained is used as a moulding die for making a custom made in-the-ear hearing aid.

REFERENCES:
patent: 1077766 (1913-11-01), Von Suchorzynski
patent: 1755775 (1930-04-01), Dunn
patent: 3440314 (1969-04-01), Frisch
patent: 4006796 (1977-02-01), Cochorst
patent: 4091067 (1978-05-01), Kramer et al.
patent: 4349083 (1982-09-01), Bennett
patent: 4569812 (1986-02-01), Werwath et al.
patent: 4834927 (1989-05-01), Birkholz et al.
patent: 5201007 (1993-04-01), Ward et al.

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