ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,470,862, issued on Nov. 11, was assigned to EM-TECH Co. Ltd. (Gyeongsangnam-do, South Korea).
"Hybrid microspeaker" was invented by Byung Min Yu (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hybrid microspeaker includes a low-frequency range speaker and a high-frequency range speaker. The low-frequency range speaker includes a frame, a low-frequency range magnetic circuit installed inside the frame, a voice coil configured to vibrate by mutual electromagnetic force with the low-frequency range magnetic circuit, and a diaphragm seated on the frame and configured to vibrate with the voice coil to generate sound. The high-frequency r...