Hook-shaped part of a behind-the-ear hearing aid

Details Hook-shaped part of a behind-the-ear hearing aid Hook-shaped part of a behind-the-ear hearing aid

1979-12-14

1981-10-27

Hix, L. T.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

179107H, H04R 2502

Patent

active

042968291

ABSTRACT:
A hook shaped part (2) for a behind the ear hearing aid. The hook shaped part is hollow and at one end (5) formed to be connected to an acoustic output from the upper front end of the hearing aid case (1) and serving to transmit sound from the hearing aid in the direction of the ear, normally through a tube (3) and an ear plug (4), and also serving to support the hearing aid upon the outer ear. In the hook shaped part there is, at the end (8) furthest from the hearing aid included an acoustic filter (9). The hook shaped part (2) has, in the direction away from the hearing aid a channel (6) of increasing cross sectional area. Through the form of the channel (6) is obtained a suppression of resonant phenomena in the tube (3) and the frequency response is made independent of the length of this tube.

REFERENCES:
patent: 3259205 (1966-07-01), Dubow

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