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:
Apr. 19, 2016
Filed:
Feb. 18, 2010
Kensaku Obata, Kawasaki, JP;
Yoshiki Ohta, Sakado, JP;
Yoshitomo Imanishi, Fujimi, JP;
Akihiro Iseki, Kawasaki, JP;
Kensaku Obata, Kawasaki, JP;
Yoshiki Ohta, Sakado, JP;
Yoshitomo Imanishi, Fujimi, JP;
Akihiro Iseki, Kawasaki, JP;
PIONEER CORPORATION, Kanagawa, JP;
Abstract
The disclosed active vibration noise control device is suitable for use in cancelling out vibration noise by outputting control noise from a plurality of speakers. When a vibration noise frequency is in a dip bandwidth, the active vibration noise control device alters the step size parameters used to update the filter coefficient at at least one filter coefficient update means from among a plurality of filter coefficient update means. Thus, the filter coefficient update speed can be retarded in unstable dip bandwidths, enabling loss in silencing effect which occurs during dip characteristics to be appropriately reduced.