CONDENSER MICROPHONE

摘要

Provided is a condenser microphone having a plurality of condenser microphone units connected in series to improve output sensitivity, and simplify a circuit configuration of the condenser microphone. The condenser microphone units are directly connected to each other in series. An audio signal obtained from one condenser microphone unit, excepting a last series-connected condenser microphone unit, is transmitted to an adjacent succeeding condenser microphone unit, and first and second impedance converters each using an active element are connected to first and last series-connected condenser microphone unit. The audio signals obtained from the condenser microphone units are added and output with balance from output terminals of the first and second impedance converters.

主权项

1. A condenser microphone comprising:
a plurality of condenser microphone units each including a fixed electrode and a diaphragm disposed to oppose the fixed electrode; and first and second impedance converters, wherein the fixed electrodes and the diaphragms of the condenser microphone units are connected in series to be added in phase and output audio signals obtained from the condenser microphone units, the condenser microphone units are directly connected to each other in series to transmit an audio signal obtained from one condenser microphone unit, excepting a last condenser microphone unit, to an adjacent succeeding condenser microphone unit, the first and second impedance converters each using an active element are connected to first and last series-connected condenser microphone units, and audio signals obtained from the condenser microphone units are added and output with balance from output terminals of the first and second impedance converters.