ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,548,544, issued on Feb. 10, was assigned to Apple Inc. (Cupertino, Calif.).
"Feedforward and feedback headphone acoustic noise cancellation" was invented by Tom-Davy W. Saux (Los Altos, Calif.), Victoria Chiu (San Jose, Calif.), Hanchi Chen (San Jose, Calif.), Mark Noon (San Jose, Calif.) and Vladan Bajic (San Francisco).
According to the abstract* released by the U.S. Patent & Trademark Office: "A processor is configured to determine, using an adaptive filter algorithm, an adaptive feedforward acoustic noise cancellation, ANC, filter, filter a headphone internal microphone signal using a feedback filter to produce a feedback audio signal, drive a headphone speaker with the feedback ...