3Pcs RobotDyn® Microphone Sound Measure Module Voice Sensor Board with Digital and Analog

Schematic: http://img.banggood.com/file/products/20171225001847SoundDetect.pdf Feature: The Sound measure is Sensor module is based on a microphone and a power amplifier. It can be used for measuring the sound strength of the environment. The value of digital output can be adjusted by the potentiometer. Also, can use Analog output to get an analog variable signal. For Sound Measure has two outputs: AO - analog output, real-time output voltage signal of the microphone DO - when the sound intensity reaches a certain threshold, the output high and low signal The threshold-sensitivity can be adjusted via potentiometer on the sensor Package includes: 3 x Sound Measure Module