Can detect the intensity of the sound environment, use note: the sound sensor can identify the presence of (according to the principle of vibration) or a particular frequency of sound does not recognize the volume of the sound

Sound module sound intensity is the most sensitive to the environment, commonly used to detect the intensity of the sound of the surroundings.

Module in the intensity of the sound environment than set threshold, the OUT output high level, when the intensity of the sound from the outside environment more than set threshold, the module OUT output low level;

Small digital output board OUT can be attached directly to the microcontroller, through single chip microcomputer to detect the high and low level, thus to detect sound environment;

Small digital output board OUT this shop can be directly driven relay module, which can form a voice-activated switch

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