Audio monitoring system circuit

Published:2011/6/8 20:23:00 Author:Christina | Keyword: Audio, monitoring system | From:SeekIC

This audio monitoring system circuit uses the fuzzy judgment method, it continuously monitor the audio for 3 seconds every 6 seconds, the interval time and the detection time are adjustable. The working process is: If it detects the sound, the audio indicator light will turn on for 6 seconds. If it does not detect the sound signal, it will continuously monitor for 3 seconds, if there is the sound signal, the indicator light will turn on for 6 seconds, if there is no sound signal in the 3 seconds, the indicator light will turn off and it will send out the alarm for 0.5 second, after the alarm, the circuit will keep the non-detection state for 6 seconds, then repeats the above examination process. The circuit is as shown in the figure.



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