Grove - Loudness Sensor
Grove - Loudness Sensor

Description of product

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.



  • Grove compatible interface

  • Wide supply voltage range

  • Built-in signal filtering

  • Gain adjustable via screw potentiometer

For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your using of the product.



Please visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to our forum.

Technical Details

Dimensions24mm x 20mm x 9.8mm
WeightG.W 7g    
Voltage3.5~10 VDC
Working Frequency50~2000 Hz
Sensitivity-48~66 dB
Signal-to-noise Ratio>58 dB
Output Signal rangeAnalog Signal (0-1023)

Part List

Grove - Loudness Sensor1