Combined microphone and magnetic induction pickup system
First Claim
Patent Images
1. A combination microphone and induction pickup, suitable for use in a miniature hearing aid, comprising:
- a U-shaped magnetically permeable core having first and second leg portions connected by a bight portion;
an electrical induction coil disposed in encompassing relation to the bight portion of the core;
and a miniature microphone mounted between the legs of the core.
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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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Citations
17 Claims
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1. A combination microphone and induction pickup, suitable for use in a miniature hearing aid, comprising:
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a U-shaped magnetically permeable core having first and second leg portions connected by a bight portion; an electrical induction coil disposed in encompassing relation to the bight portion of the core; and a miniature microphone mounted between the legs of the core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification