Condenser microphone

Details Condenser microphone Condenser microphone

2006-09-12

2006-09-12

Kuntz, Curtis (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Microphone capsule only

C381S369000, C381S190000, C381S191000, C381S355000

Reexamination Certificate

active

07106869

ABSTRACT:
The present invention relates to a condenser microphone whose body can be miniaturized while keeping a property and a sound quality comparable to those of a conventional condenser microphone. The condenser microphone includes a cylindrical body, a plurality of vibration plates which are formed into the shapes of squares and placed in parallel to a body axis line within the body, acoustic holes formed on a body side wall in a direction vertical to the vibration plates and back pole plates which are placed on a side opposite to the acoustic holes with the vibration plate between and face on the respective vibration plates at an interval of a micro gap. A potential of the back pole plate is varied according to a vibration of the vibration plate.

REFERENCES:
patent: 4156800 (1979-05-01), Sear et al.
patent: 6985597 (2006-01-01), Akino

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