Measuring and testing – Vibration – By mechanical waves
Patent
1984-08-28
1985-10-22
Kreitman, Stephen A.
Measuring and testing
Vibration
By mechanical waves
179107FD, 128746, H04R 2900
Patent
active
045480826
ABSTRACT:
A hearing aid including a microphone for generating an electrical output from sounds external to a user of the hearing aid, an electrically driven receiver for emitting sound into the ear of the user of the hearing aid, and circuitry for driving the receiver. The circuitry drives the receiver in a self-generating mode activated by a first set of signals supplied externally of the hearing aid to cause the receiver to emit sound having at least one parameter controlled by the first set of externally supplied signals and then drives the receiver in a filtering mode, activated by a second set of signals supplied externally of the hearing aid, with the output of the external microphone filtered according to filter parameters established by the second set of the externally supplied signals. Other forms of the hearing aid, apparatus for supplying the sets of signals to the hearing aid in a total system, and methods of operation are also described.
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Engebretson A. Maynard
Morley, Jr. Robert E.
Popelka Gerald R.
Central Institute for the Deaf
Kreitman Stephen A.
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