Sound communication system

Details Sound communication system Sound communication system

H - Electricity

04

R

179/4

H04R 27/00 (2006.01) G08B 3/10 (2006.01)

Patent

CA 1104062

R.K. Peecher 1 SOUND COMMUNICATION SYSTEM Abstract of the Disclosure A combination including two or more of a two-way radio, a siren for loudspeaker broadcast of plural siren sounds from an emergency vehicle or the like, loudspeaker broadcast from a radio output, a single microphone for both radio and loudspeaker use, a logic circuit for the public address override of two selector switches. -1-

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