Ear protection and hearing device

Details Ear protection and hearing device Ear protection and hearing device

1974-08-26

1976-04-20

Cooper, William C.

179156R, H04M 119

Patent

active

039521583

ABSTRACT:
A device for protecting the ears from loud sounds while enabling low-level voice frequency sounds to be discerned. A microphone is positioned on the outside of an insulated ear protector and a sound reproducer positioned within the protector. The sound picked up by the microphone is subjected to audio amplitude compression and voice frequency bandpass filtering before being converted back to sound.

REFERENCES:
patent: 3306991 (1967-02-01), Wood
patent: 3394226 (1968-07-01), Andrews

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