The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2012
Filed:
Apr. 26, 2007
Kensuke Kageyama, Kita-ku, JP;
Kensuke Kageyama, Kita-ku, JP;
National University Corporation Saitama University, Saitama-shi, JP;
Abstract
A microphone-capsule includes a vibrator implemented by a conductor having a flat vibration surface, a dielectric-polarization plate that is defined by a flat first principal surface facing the vibration surface of the vibrating plate and a second principal surface facing parallel to the first principal surface and in which polarization directions are aligned, a back electrode joined to the second principal surface of the dielectric-polarization plate, and an induced-charge measuring unit configured to measure the charges induced between the vibrating plate and the back electrode, in association with the displacement of the vibration surface. The induced-charge measuring unit includes an amplifier connected to the back electrode and an output circuit connected to the amplifier.