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Home Knowledge Base

Sound Sensor – Working & Its Applications

Mrinali Sharma by Mrinali Sharma
August 6, 2022
in Knowledge Base
0
  • A SOUND SENSOR is a sensor that converts the sound signals or we can say vibrations created by sound into an electrical signal.
  • It detects the sound wave through its intensity and accordingly converts it with the help of an inbuilt capacitor.
Sound Sensor

Working Principle of Sound Sensor

  • The principle is similar to our working of ears.
  • Sound is a waveform of energy that is produced in the form of mechanical vibration of moving air or water molecules.
  • microphone- which consist of an in-built diaphragm that helps convert the sound vibrations which are created by moving air molecules into electrical signals.
  • diaphragm converts these vibrations with the help of a coil. The diaphragm is made up of magnets coiled by metal wire.
  • SOUND SENSOR HAVING MICROPHONE WITH MAGNETIC COIL
  • The microphone has an inbuilt diaphragm. Whenever sound waves hit the diaphragm, magnets vibrate and at the same time coil induces the current.
Working Principle of Sound Sensor

SOUND SENSOR HAVING CAPACITIVE MICROPHONE

  • Here, a capacitive microphone, peak detector, and an amplifier (LM386, LM393, etc.) that’s highly sensitive to sound.
  • Such sound waves cause the diaphragm in the microphone to vibrate and are responsible for capacitance change. the change in capacitance is then amplified and digitized.

Applications of Sound Sensor

  • 1. Detect sound pollution and more with SPCPM.
  • A Solar Powered City Pollution Monitor (SPCPM) can help you sense overall air and sound quality in the city as sound pollution is a common issue nowadays.

  • 2. Baby Monitor with Sound Sensor
  • If you’re a parent or caretaker that’s always worrying about your baby regarding its health, temperature, environment, etc., this smart baby monitoring project is the one for you!

ADVERTISEMENT

Other Applications:

  • Security system(Office or Home)
  • Home Automation
  • Robot world
  • Smart Phones
  • sound recognition
  • Audio amplifier
  • Sound level recognition
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Mrinali Sharma

Mrinali Sharma

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