How a Microphone works!

Microphone is that small instrument which enables you to chat on your mobile phones to other people, to address a large audience and for giving speeches and many more things. We are going to be discussing how a Microphone Works!

In a different article we had already discussed about history and types of Microphones. Thus in this blog we will directly be discussing about the working of the Microphone.


How a Dynamic Microphone Works?


 Microphone Works

A Microphone namely Dynamic Microphone which are most commonly used in today's world works with the help of Electromagnetic Induction. They use a coil of wire suspended in a magnetic field. It has a thin diaphragm which captures the Audio Signal. The Diaphragm is attached to the coil.

When the Diaphragm vibrates in response to incoming sound waves, the coil moves backward and forward past the magnet. Yes, it is this simple. This is actually how a microphone works! Well, there is not just one type of Microphone. You might know that if you read our article on Different Types of Microphones. Well, which is better: Dynamic or Condenser Microphone.


How do Condenser Microphone Works?


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The Capacitor in a Condenser Microphone consists of Two Metal Surfaced Plates which are placed really close to each other with a voltage across them.

One is called a metal plate and the other is known as the Diaphragm which is made of very light weight metal. The Diaphragm detects subtle variations in air pressure which make up the soune of the room, vocal or instrument being recorded.

As the sound waves vibrate the diaphragm, the varying distance between Diaphragm and back plate causes the voltage across the capacitor to change. This voltage is the rapid signal, rapidly fluctuating to mimic the pattern of the original Sound Waves.


Dynamic vs Condenser Microphones

Do you know that Condenser Microphones are more noise sensitive than Dynamic Microphones. Condenser means Capacitor, and electrical component which stores energy in the form of an electro-static field.

It uses a capacitor to convert acoustical energy into electrical energy. Condensers are more responsive, powerful and louder than dynamic Microphones.

But they are not ideal for high-volume work due to their sensitivity, thus a loss due to sensitivity.

The reason why Dynamic Microphones are more used than Condenser Microphones is because they are less expensive and as they are also less sensitive in comparison to Condenser Microphones they tend to take much more punishment.

Did you also know that Condenser Microphones require an external power source to function.

Thus, if you are tight on a budget and need a Microphone which can last long Dynamic Microphones are the best choice. They are available on e-commerce websites like Amazon and Flipkart easily and at a cheap cost!


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