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:
Dec. 21, 2010
Filed:
Jun. 01, 2009
Isao Kakuhari, Nara, JP;
Isao Kakuhari, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An active noise control apparatus and an active noise control system for reducing noise using an active vibrator, such that edges β of the vibrator (i.e. genesis locations of a bending moment of force caused by the vibrator) agree with positions α on a distribution of the bending moment of force caused by noise vibration of a panel, and such that the edges β of the vibrator are aligned with the positions α on the panel where a sign, of the distribution of the bending moment of force over the panel caused by the noise vibration, reverses. As a result, a control vibration approximate to the noise vibration can be excited. Accordingly, when the vibrator is fixed by agreeing the edges β of the vibrator with the positions α determined by noise frequency desired to be reduced, noise due to a target noise frequency can be effectively reduced.