US Patent Issued to Honda Motor on Sept. 29 for "Active noise reduction system" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,749,474, issued on Sept. 29, was assigned to Honda Motor Co. Ltd. (Tokyo).

"Active noise reduction system" was invented by Xun Wang (Saitama, Japan) and Toshio Inoue (Saitama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 filter configured to generate a control signal for controlling the canceling sound output device, and a secondary path filt...