Paul Randolph Sutton

US Patent:

56616996, Aug 26, 1997

Filed:

Feb 13, 1996

Appl. No.:

8/605250

Inventors:

Paul W. Sutton - Chula Vista CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H04B 1100

US Classification:

367132

Abstract:

An acoustic communication system comprises: a voice processing circuit wh generates a first signal representing a voice message; a noise sensor channel which generates a second signal in response to detecting background noise in an environment; a microcomputer which receives the first and second signals, and provides a third signal to a selected one of first and second output ports of the microcomputer, where the amplitude of the third signal is functionally related to the value of the second signal; an ultrasonic output channel coupled to the first output port and which generates an ultrasonic output signal representing the voice message in response to receiving the third signal; a pubic address channel coupled to the second output port which generates an audible signal representing the voice message in response to receiving the third signal; and an ultrasonic receiving system which generates an audible output representing the voice message in response to receiving the ultrasonic output signal.