Combined microphone and magnetic induction pickup system

Details Combined microphone and magnetic induction pickup system Combined microphone and magnetic induction pickup system

1990-11-08

1992-03-31

Dwyer, James L.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 68, 381 685, 381 687, 379 52, H04R 2500, H04M 1100

Patent

active

051014351

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.

REFERENCES:
patent: 2165123 (1939-07-01), Ballantine
patent: 3396245 (1968-08-01), Flygstad
patent: 3659056 (1972-04-01), Morrison et al.
patent: 4912769 (1990-03-01), Erbe
patent: 5010575 (1991-04-01), Marutake et al.
Omni Hearing Systems, "Model X312A", Dec. 1990.

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