This research aims to develop applications on the mobile. Seat belt alarm and alarm to alert emergency finance as well as defects. It is known that the deaf to hear sound notifications could not be realized. This is why, the deaf hear the accident to life. Therefore, this research, it's idea is similar to the method of analysis of emergency alert sound. To communicate with people who don't understand sign language, and administrators through applications on the mobile. All told the direction of a sound source by means of belts and emergency alerts with flashing lights, while you sleep, alarm boxes. From the results of a trial of mobile applications can be notified within a period of time the standard notification device and voice alerts to meet 100% of the recorded sound, incorporating a number of sounds that do not affect the recording duration for the audio detection alarm belt can be 100% at the highest stage, 17 meters and can alert based on the direction of the sound, 59.65% and receive alarm box was 82.5% up 10.65 meters, and can alert the user is 16.67%.
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