ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,425,763, issued on Sept. 23, was assigned to Honda Motor Co. Ltd. (Tokyo).

"Sound field control device and filter determination system" was invented by Xun Wang (Wako, Japan) and Toshio Inoue (Wako, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a sound field control device configured to produce a listening area where a travel sound effect is audible and a quiet area in a sound field in a vehicle using a plurality of speakers. The sound field control device includes: a periodic waveform generator configured to generate different phase two periodic waveforms related to the travel sound effect based on the vehicle speed, and a sound fie...