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

Specifications

Item	Min	Typical	Max	Unit
Voltage	3.5	5.0	10	VDC
Working Frequency	50	-	20,000	HZ
Sensitivity	-48	-	66	dB
Signal-to-noise Ratio	>58			dB
Output Signal range	Digital Signal (0-1023)			/

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.

Documents

Please visit wiki page for more info about this product