Detect sound around you with a sound sensor.

In this guide, you will learn how to use a sound sensor with an Arduino, so that an LED turns on when sound is detected.

After completing this guide, you can incorporate sound detection in your next Arduino projects! 
    • Connect the Sound Module to 5V.

    • Connect the Sound Module to Ground

    • Connect the Sound Module to Analogue Pin 0.

  1. int led = 13; // We are going to make Pin 13 LED blink
    int threshold = 28; // Change this to the level you want the light to come on
    int volume;
    void setup() {
      pinMode(led, OUTPUT);
    void loop() {
      volume = analogRead(A0); // Read the value from the Analog PIN A0
      if (volume >= threshold) {
        digitalWrite(led, HIGH); //Turn ON Led
      } else {
        digitalWrite(led, LOW); // Turn OFF Led
    • Copy the code and upload it to your Arduino.

    • Open the Serial Monitor to see the values you are getting in a quite room.

    • You may want to change the value of 'Threshold' so that when a loud sound is made the LED comes on.