ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,394,403, issued on Aug. 19, was assigned to Alps Alpine Co. LTD. (Tokyo).
"Active noise control system" was invented by Ryosuke Tachi (Fukushima, Japan) and Keita Tanno (Fukushima, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An active noise control system includes an error adder that generates an error signal by adding an output of a left-seat left microphone and an output of a left-seat right microphone, an adaptive filter that generates a noise canceling sound from a reference signal by performing an adaptive operation using the reference signal and the error signal, a left channel gain adjustment section that adjusts a gain of the noise canc...