Condenser Microphone Unit and Condenser Microphone
AssigneeKabushiki Kaisha Audio-Technica
InventorHiroshi Akino
Life of this patent
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Abstract
A condenser microphone includes multiple condenser microphone units. Each unit includes an impedance converter. The condenser microphone units are connected in series such that outputs of the impedance converter in one of the condenser microphone units drive another of the condenser microphone units. A polarization voltage is accumulated to a DC voltage supplied from a DC voltage supply through a voltage adjuster to be applied to one of a diaphragm and a fixed electrode, and a voltage applied to the one of the diaphragm and the fixed electrode is adjusted by the voltage adjuster.
Claims18
A condenser microphone unit comprising;
- a diaphragm;
- and
- a fixed electrode facing the diaphragm with a predetermined gap therebetween, wherein
- one of the diaphragm and the fixed electrode has an electret layer to generate a polarization voltage between the diaphragm and the fixed electrode,
- the polarization voltage is accumulated to a DC voltage supplied from a DC voltage supply through a voltage adjuster to be applied to the one of the diaphragm and the fixed electrode, and
- a voltage applied to the one of the diaphragm and the fixed electrode is adjusted by the voltage adjuster.
A condenser microphone comprising:
- multiple condenser microphone units each including:
- a diaphragm;
- a fixed electrode facing the diaphragm with a predetermined gap therebetween;
- and
- an impedance converter, wherein
- the condenser microphone units being connected in series such that outputs of the impedance converter in one of the condenser microphone units drive another of the condenser microphone units,
- one of the diaphragm and the fixed electrode has an electret layer to generate a polarization voltage between the diaphragm and the fixed electrode,
- the polarization voltage is accumulated to a DC voltage supplied from a DC voltage supply through a voltage adjuster to be applied to the one of the diaphragm and the fixed electrode, and
- a voltage applied to the one of the diaphragm and the fixed electrode is adjusted by the voltage adjuster.
Dependencies are inferred from the claim text.