High sensitivity microphone

A high sensitivity microphone comprising:

• a sound detecting module including dual vibration films and a fixed film between the dual vibration films;
• a power source circuit supplying a power source supplied from an outside to the sound detecting module through a switch control of a first switch applying a first bias and a second switch applying a second bias that is opposed to the first bias;
• a detecting circuit removing a noise included in a first capacitance signal and a second capacitance signal that are differential input from the sound detecting module, according to a switch control of a third switch inputting the first capacitance signal in conjunction with the first switch and a fourth switch inputting the second capacitance signal in conjunction with the second switch;
• and
• a switch controller performing a first switch mode linking the first switch and the third switch, and a second switch mode linking the second switch and the fourth switch for a differential input and output of the microphone.