Local external communication system

Details Local external communication system Local external communication system

1982-05-06

1985-04-02

George, Keith E.

Surgery

Truss

Pad

73652, 12820119, 381 87, 179121C, 179121T, 179157, H04R 108, H04M 105, A62B 1800

Patent

active

045089361

ABSTRACT:
A local external communication system for use by a person wearing a mask covering the nose and mouth and in sealing engagement with the face in which an assembly secured to the outer surface of the mask without in any way affecting the integrity of the mask seal generates an output signal in response to the wearer's voice. The output signal is fed to a speaker carried on the wearer's body to produce an output which is audible to other persons in the vicinity of the wearer.

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patent: 4010334 (1977-03-01), Demeter
patent: 4072831 (1978-02-01), Joscelyn
patent: 4258229 (1981-03-01), Eggert et al.

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