SOUND SENSOR

The sound sensor is one of the most prominent sensors used in the electronics system nowadays. A sound sensor detects the intensity of sound and converts it into an electrical signal. This module includes a Microphone, a Peak detector, and an Amplifier. In this converter IC, we use LM393 Op-amp that is highly sensitive to sound. When the sensor detects a sound it is processed and the output voltage signal is provided to the microcontroller for further processing. This module can detect noise levels at a range of decibels at 3 kHz-6 kHz frequencies, approximately where the human ear is sensitive.

PIN DESCRIPTION

• Pin1: (VCC) – 3.3V DC to 5V DC
• Pin2 🙁 GND) – This is a ground pin
• Pin3 🙁 DO) – This is an output pin
• Pin4: ( A0 ) – Analog output pin

The working of the sound sensors is similar to that of the human ear. The microphone presents in the sensors uses the vibration generated and convert it into current or voltage. When the sound signal hits the diaphragm the magnet present within the sensor undergoes vibration, as a result, the current stimulates from the coil.

This converter IC consists of an inbuilt potentiometer to adjust the set point for the sound level. The analogue/digital output pin of the module is connected to the analogue/digital pin of the microcontroller. When the sound level exceeds a threshold value, the LED turns ON, and output sets to low.

APPLICATIONS:

• Security system for Office or Home
• Spy Circuit
• Home Automation
• Robotics
• Smart Phones
• Ambient sound recognition
• Audio amplifier