Patent ID: 6121881
Filing Date: 2000-09-19
Classification: A62B,G08B,H04B,H04R

Abstract:
A protective mask communication device for use in hazardous environments, with a protective mask that is adapted to be worn over a person's face and to supply air to the wearer, comprising:a housing construction to be mounted on the protective mask, and, disposed within the housing,a microphone, in acoustic communication with the interior of the mask, and a speaker, in acoustic communication with the wearer's ear,a transceiver constructed to transmit and receive relatively low power signals to and from another similar communication device located nearby, and to transmit and receive relatively higher power signals to and from a remote transceiver located relatively further away than said similar communication device, andcircuitry constructed to process the signal received from the microphone and supply an input signal to the transceiver.