US Patent Issued to Honda Motor on March 24 for "Active noise reduction system" (Japanese Inventors)

ALEXANDRIA, Va., March 24 -- United States Patent no. 12,586,557, issued on March 24, 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 of an IMC type includes a canceling sound output device, an error microphone, and a controller. The error microphone is configured to generate an error signal. The controller includes a control filter and a secondary path filter. The secondary path filter is configured to generate a canceling sound estimation signal. The control filter is configured to generate a control signal based on a refere...