Magnetoresistive microphone and acoustic sensing devices

Details Magnetoresistive microphone and acoustic sensing devices Magnetoresistive microphone and acoustic sensing devices

1994-03-30

1995-09-12

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

367174, 381168, 381179, 181148, H04R 2300

Patent

active

054503728

ABSTRACT:
In accordance with the invention, a new type of microphone utilizes a magnetoresistive sensing element. Specifically, acoustical energy causes vibrations between a magnetoresistive element and a magnet, producing a variation in the resistance which can be used to convert an acoustical signal into a corresponding electrical signal.

REFERENCES:
patent: 4602513 (1986-07-01), Hirota et al.
patent: 4722229 (1988-02-01), Hirota et al.
patent: 4745812 (1988-05-01), Amazeen et al.

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