Electret condenser microphone, commonly known as microphone, is a kind of acoustoelectric converter, belonging to condenser microphone. Electret condenser microphone uses electret material (commonly known as permanent electret) which can store charge as the diaphragm or back electrode, so there is no need for external polarization power supply.

Electret condenser microphone, commonly known as microphone, is a kind of acoustoelectric converter, belonging to condenser microphone. Electret condenser microphone uses electret material (commonly known as permanent electret) which can store charge as the diaphragm or back electrode, so there is no need for external polarization power supply.

Electret condenser microphone, commonly known as microphone, is a kind of acoustoelectric converter, belonging to condenser microphone. Electret condenser microphone uses electret material (commonly known as permanent electret) which can store charge as the diaphragm or back electrode, so there is no need for external polarization power supply.

Electret condenser microphone, commonly known as microphone, is a kind of acoustoelectric converter, belonging to condenser microphone. Electret condenser microphone uses electret material (commonly known as permanent electret) which can store charge as the diaphragm or back electrode, so there is no need for external polarization power supply.