SOUND-TYPE DETECTION SYSTEM

摘要

A sound-type intrusion and mechanical disturbance detection system includes a plurality of monitors located at a control station and individually connected detector-transducer units located in the various areas to be protected. A common AC and DC supply is used for the monitors as well as a common speaker and amplifier. Multiple mechanical disturbance detectors may be used, each producing a characteristic output sound so as that the attendant may determine the appropriate action to be taken.