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Carbon microphones

 

How it works:

a container with carbon granules, closed of by a rubber membrane, with two elctrodes inserted, is powered by an electrical current. When sound reaches the microphone, the carbon granules are pressed together. The changing current is further amplified and results in a reasonable sound quality.

Carbon mics were the first professional microphones and were used in early Radio transmissions, they were also known as "transmitters".

Originally this design was first used in telephones.

 

carbon mic
 

Their pick-up pattern is Omni.

omni pattern

 

 

 

 

 

 

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