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. 28, 2015
Filed:
Dec. 18, 2009
Applicants:
Keiji Mori, Osaka, JP;
Hiroyuki Kano, Hyogo, JP;
Tsuyoshi Maeda, Hyogo, JP;
Yoshifumi Asao, Osaka, JP;
Inventors:
Keiji Mori, Osaka, JP;
Hiroyuki Kano, Hyogo, JP;
Tsuyoshi Maeda, Hyogo, JP;
Yoshifumi Asao, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61F 11/06 (2006.01); G10K 11/178 (2006.01);
U.S. Cl.
CPC ...
G10K 11/1786 (2013.01); G10K 2210/1281 (2013.01); G10K 2210/3055 (2013.01); G10K 2210/3027 (2013.01); G10K 2210/3221 (2013.01);
Abstract
A noise control device includes the following structural elements. A signal memory records both of a noise signal supplied from a noise microphone and an error signal supplied from an error microphone. A filter coefficient calculator calculates a fixed filter coefficient of a control filter by using data recorded in the signal memory. A filter coefficient renewing section renews, at a given timing, a filter coefficient set at a fixed filter in a control filter to a filter coefficient read out from the filter coefficient calculator.