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. 29, 2015
Filed:
Apr. 09, 2010
Yoshiki Ohta, Sakada, JP;
Manabu Nohara, Tsurugashima, JP;
Yusuke Soga, Kawasaki, JP;
Shin Hasegawa, Kawagoe, JP;
Hisashi Kihara, Tsurugashima, JP;
Yoshiki Ohta, Sakada, JP;
Manabu Nohara, Tsurugashima, JP;
Yusuke Soga, Kawasaki, JP;
Shin Hasegawa, Kawagoe, JP;
Hisashi Kihara, Tsurugashima, JP;
PIONEER CORPORATION, Kanagawa, JP;
Abstract
An active vibration noise control device is preferably used for canceling a vibration noise by making a speaker generate a control sound. Concretely, the active vibration noise control device includes an attenuating unit which attenuates a control signal generated by an adaptive notch filter, and provides the attenuated control signal to the speaker, when amplitude of a filter coefficient is larger than a threshold. Therefore, it is possible to suppress continuous ups and downs of the filter coefficient during an occurrence of an abnormality. Hence, it becomes possible to appropriately suppress an occurrence of a cyclic abnormal sound and an increase in the vibration noise during the occurrence of the abnormality.