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Arduino Compatible Audio / Sound Sensor

Old Price: $3.11

Special Price: $1.56

Part Number: HP-ASE-SND

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Get creative with your friends and families

The Sound Detction Sensor is a small board that combines a microphone and some processing circuitry, it has the ability to detect different sizes of sound. This sensor can be used to for a variety of uses from industrial to simple hobby or playing around.Sound sensors can be used for a variety of things, one of them could be turning lights off and on by clapping.

The Sound Detection sensor module has a built-in capacitive electret microphone which is highly sensitive to sound. Sound waves cause the thin film of the electret to vibrate and then the capacitance changes, thus producing the corresponding changed voltage, so it can detect the sound intensity in ambient environment. Since the change is extremely weak, it needs to be amplified. A LM393 is used as the power amplifier here. Adjust the sensitivity by rotating the Potentiometer. When the sound level exceeds the set point, an LED on the sensor module is illuminated and the output is sent low.

Given that this device measures whether or not sound has exceeded a threshold, you’re basically left with determining what it is you want to do. For e.g. you can do something when it is quiet and/or you can do something when it is loud.

Examples listed below for a better understanding:

  • Detect whether or not a motor is running.
  • Set a threshold on pump sound so that you know whether or not there is cavitation.
  • In the presence of no sound, you might want to create an ambiance by turning on music.
  • In the presence of no sound and no motion, you may go into an energy savings mode and turn off the lights.

Included with the package:

 Arduino Compatible Audio/Sound Sensor Module x 1


  • Operating Voltage: 5V

Notes: This sound sensor is used to detect whether there’s sound surround or not, it cannot recognize the frequency or volume, please don’t use the module to collect sound signal.

On the top of the sound sensor is a little flathead screw you can turn to adjust the sensitivity and analog output of the sound sensor. To calibrate the sound sensor you can run some music in the background and keep turning it until you start seeing the sensor-LED on the module starts blinking with the rhythm.

  • When less sensitive, it takes more sound to trigger the device
  • When more sensitive, it takes less sound to trigger the device


  •  + : 5 V DC from your Arduino
  • G : GND from your Arduino
  • D0 : Connect to Digital Input Pin
  • A0 : Connect to Analog Input Pin

The Sound Detection Sensor has four pins that needs to be connected to your Arduino. The top one(if you look at the image above), is AO. This should be connected to the analog input 0 on the Arduino(A0). The one beside that is GND, which is connected to ground, the VCC is connected to +5V, and the last one is DO – which is the digital output of the module, and should be connected to digital pin 2 on the Arduino.

*This product is not produced or endorsed by Arduino.