Combined microphone and magnetic induction pickup system
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United States of America Patent
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-
Mar 31, 1992
Grant Date -
N/A
app pub date -
Nov 8, 1990
filing date -
Nov 8, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ear insertable hearing aid having both a miniature microphone and a magnetic induction pickup which can be used simultaneously or alternately. The invention includes a core for the magnetic induction device that maximizes the surface area usable for sensing changes in magnetic flux but which is yet of a size that can act as a surrounding emplacement for the miniature microphone disposed between the plates of the substantially U-shaped core.
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