Polarization voltage setting of microphones

Details Polarization voltage setting of microphones Polarization voltage setting of microphones

2005-03-30

2009-11-17

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

With electrostatic microphone

C381S111000, C381S122000, C330S297000

Reexamination Certificate

active

07620189

ABSTRACT:
A microphone includes a microphone capsule biased with a polarization voltage from a winding on a transformer. The polarization voltage is controlled by a regulation circuit that may have an analog regulation circuit and a digital regulation circuit. A controller adjusts the polarization voltage that varies the sensitivity of the microphone.

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