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Making a burglar-detector? Cool music VU-meter?
This is the perfect module for you! The microphone goes into a very high-sensitivity LM393 comparator to give an output signal when a sound or noise threshold is crossed! This sound-detection module features a single-channel signal output that is Arduino compatible, an output valid signal is low. It's really easy to use, and the threshold is easily adjusted by a single potentiometer. This module can be used for voice-activated lights, with light sensors make a sound and light alarm, and voice control, voice detection occasions.
All moving objects generate sound when they move, unless you're in a vacuum. When any person moves inside a security zone they are disturbing the air and creating sound waves. These sound waves may be undetectable to the human ear but never the less they are created. A microphone placed in the security zone can detect these movements and report the unauthorized movement.
In the case of the bad guy breaking through a ceiling or a window the sound of breaking in is detected before the actual entry is completed. This type of detection would set off an alarm before the criminal had a chance to finish punching the hole through.
Sound detection is a very effective way of protecting an inside area because it doesn't rely on easily by-passed perimeter protection and it is omni-directional unlike video cameras that only look in one direction at a time - the audio detector can listen in all directions all the time. This type of intrusion detection is very effective at protecting large indoor areas from unauthorized entry.
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