an improved seismic alarm system designed to alarm users of an upcoming seismic event and other natural disasters , and aid victims &# 39 ; survival after an earthquake . the seismic alarm system includes an accelerometer , a controller , an acoustic - to - electric transducer for acoustic pattern detection , and rf module to receive emergency radio signals . the alarm system has central controlling unit that sets off an alarm after processing signals from several module and components : accelerometer detects seismic p wave acceleration changes for early earthquake detection ; acoustic - to - electric transducer detects human acoustics or predetermined acoustic patterns , then initiates an alarm that brings rescue attention to survivors ; rf module is tuned to receive emergency radio signals .