Hearing aid which cuts on/off during removal and attachment to t

Details Hearing aid which cuts on/off during removal and attachment to t Hearing aid which cuts on/off during removal and attachment to t

1988-03-29

1990-09-11

NG, Jin F.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 692, 381123, 623 24, H04R 2500

Patent

active

049557297

ABSTRACT:
A hearing aid includes an electronic amplifier, an electric power source and a switch for automatically breaking or making the connection between the amplifier and the power source depending on whether the hearing aid is in use or out of use. The switch is provided in such a manner so as to be responsive to switching criterion defined by a change of state such as change in temperature, moisture etc. The switch is disposed at a wall surface which is subjected to the change of state.

REFERENCES:
patent: 2673898 (1954-03-01), Reichert
patent: 2899499 (1959-08-01), Eichwald
patent: 3227836 (1966-01-01), Renwick, Sr.
patent: 3491203 (1970-01-01), Shabad
patent: 3869619 (1975-03-01), Camillo
patent: 4278873 (1981-07-01), Petrides
patent: 4295088 (1981-10-01), Malchow
patent: 4467145 (1984-08-01), Borstel
patent: 4504922 (1985-03-01), Johnson et al.
patent: 4800292 (1989-01-01), Gillett

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