Sound Sensor Module

The sound sensor is one type of module used to notice the sound. Generally, this module is used to detect the intensity of sound. The applications of this module mainly include switch, security, as well as monitoring. The accuracy of this sensor can be changed for the ease of usage.

This sensor employs a microphone to provide input to buffer, peak detector and an amplifier. This sensor notices a sound, & processes an o/p voltage signal to a microcontroller. After that, it executes required processing.

This sensor is capable to determine noise levels within DB’s or decibels at 3 kHz 6 kHz frequencies approximately wherever the human ear is sensitive. In smartphones, there is an android application namely decibel meter used to measure the sound level.

Note : There are two versions available, 3 Pin and 4 Pin. The 3 pin version has only digital output, where as the 4 Pin has both digital and analog Outputs.

Specifications :

• Operating voltage : 3.3 V
• Operating current : 4~5 mA
• Voltage gain : 26 dB ((V=6V, f=1kHz)
• Sensitivity of the microphone (1kHz) : 52 to 48 dB
• Impedance of the microphone : 2.2k Ohm
• Frequency of m microphone : 16 to 20 kHz
• Signal to noise ratio : 54 dB

Applications :

• Security system for Office or Home
• Spy Circuit
• Home Automation
• Robotics
• Smart Phones
• Ambient sound recognition
• Audio amplifier
• Sound level recognition (not capable to obtain precise dB value)