Speaking and hearing system for breathing apparatus

Details Speaking and hearing system for breathing apparatus Speaking and hearing system for breathing apparatus

1987-03-18

1989-01-17

Curtis, Marshall M.

Electrical audio signal processing systems and devices

Noise or distortion suppression

Interpolation

379175, 381157, 367132, H04M 900

Patent

active

047992638

ABSTRACT:
A speaking and hearing system for respirators, where the apparatus wearer is connected to a respiratory gas supply independent of the ambient air. A suppression, independent of acoustic signals, of the breathing noises of the apparatus wearer is provided by a switch device located in the respiratory gas line which reacts to the respiratory gas stream for the suppression of the breathing noises.

REFERENCES:
patent: 1770821 (1930-07-01), Troisi
patent: 3123680 (1964-03-01), Minton, Jr. et al.
patent: 3415245 (1968-12-01), Yamamoto et al.
patent: 4154981 (1979-05-01), Dewberry et al.

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