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LOW_NOTE_SIREN

2014-11-21 21:14  
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LOW_NOTE_SIREN
Produces up/down blooping sounds characteristic of European police cars and now being used on some US emergency vehicles. Can be connected to burglar or theft alarm system for protection purposes, or used as portable sound box operated by momentary pushbutton switch. Includes volume control and tone control that varies both pitch and rate.-D. Heiserman, Whizbox, Modern Electronics, June 1978, p 67.