Hearing aid for persons with an impaired hearing faculty

Details Hearing aid for persons with an impaired hearing faculty Hearing aid for persons with an impaired hearing faculty

1991-07-01

1993-05-25

Ng, Jin F.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 92, 381113, 367126, H04R 2500

Patent

active

052147096

ABSTRACT:
Hearing aid for persons with an impaired hearing faculty, including a directional microphone whose pick-up characteristic can be altered, the pick-up characteristic being automatically controlled as a function of the input or output signal in such a way that all possible microphone characteristics may be set, and this is realized in that the directional microphone (10) is an electret microphone and that the changes in the pick-up characteristic take place electrically and continuously.

REFERENCES:
patent: 2678967 (1954-05-01), Grosskopf
patent: 4354059 (1982-10-01), Ishigaki et al.
patent: 4757545 (1988-07-01), Rosander
patent: 5029215 (1991-07-01), Miller, II

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