The sound sensor module provides an easy way to detect sound and is generally used for detecting sound intensity. This module can be used for security, switch, and monitoring applications. Its accuracy can be easily adjusted for the convenience of usage. It uses a microphone which supplies the input to an amplifier, peak detector and buffer. When the sensor detects a sound, it processes an output signal voltage which is sent to a microcontroller then performs necessary processing. Sound detection sensor module for arduino detects whether sound has exceeded a threshold value. Sound is detected via microphone and fed into an LM393 op amp. The sound level set point is adjusted via an on board potentiometer. When the sound level exceeds the set point, an LED on the module is illuminated and the output is set low.

Technical Specification:

• Operating voltage 3.3V-5V
• Operating Current : 15 mA
• Comparator : LM393
• Sensor type: Microphone
• Sensitivity: Adjustable via Trimmer
• Output type: Digital Output (0 or 1)
• LED lights indicators: Power (red) and Output (red)
• Size: 3.2cm*1.4cm (L*W)

Features:

• Signal output indication
• The output is digital
• Single-channel signal output
• With the retaining bolt hole, convenient installation
• Output low level and the signal light when there is sound

Pin Diagram : 

 Applications:

• Hearing aids
• Telephones
• Tape recorders and karaoke
• Live and recorded audio engineering
• Radio and television broadcasting
• Speech recognition technology