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Seeedstudio Grove - Loudness Sensor
The Grove - Loudness Sensor is designed to detect the loudness of environmental sound. Based on amplifier LM2904 and a built-in microphone, it amplifies and filters the high frequency signal that received from the microphone, and outputs a positive envelop. This will make for Arduino¡¯s signal acquisition. The output value depends on the level of sound input. In order to avoid unnecessary signal disturbances, input signal will go through two times¡¯ filtering inside the module. Lastly, there is a screw potentiometer that enables manual adjustments to the output gain.
Features Grove compatible interface Wide supply voltage range Built-in signal filtering Gain adjustable via screw potentiometer