ALEXANDRIA, Va., June 6 -- United States Patent no. 12,284,476, issued on April 22, was assigned to AAC Technologies Pte. Ltd. (Singapore).

"Sound reproducing apparatus and method" was invented by Timo Lamberg (Tampere, Finland) and Juha Backman (Tampere, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sound reproducing apparatus is disclosed. The sound reproducing apparatus includes a signal processing unit, a first transducer, and a second transducer. The signal processing unit is configured to receive a sound signal and divide the sound signal into a first frequency component and a second frequency component. The first frequency component is at least partially different from the second frequency ...