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:
Jul. 14, 2026
Filed:
Aug. 05, 2024
Honda Motor Co., Ltd., Tokyo, JP;
Xun Wang, Saitama, JP;
Toshio Inoue, Saitama, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
An active noise reduction system includes a canceling sound output device configured to output a canceling sound, an error microphone configured to generate an error signal, and a controller configured to control the canceling sound output device based on the error signal. The controller includes a control signal generation unit including a control filter configured to generate a control signal for controlling the canceling sound output device, and a sound field learning unit including a secondary path filter that represents an estimation value of a transfer function of a secondary path from the canceling sound output device to the error microphone, the control filter and the secondary path filter are configured to be adaptively updated, and the controller is configured to differentiate a timing of an adaptive update of the control filter and a timing of an adaptive update of the secondary path filter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile