Hearing aid for persons with an impaired hearing faculty
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United States of America Patent
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-
May 25, 1993
Grant Date -
N/A
app pub date -
Jul 1, 1991
filing date -
Jul 13, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Family
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