ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,452,607, issued on Oct. 21, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Speaker" was invented by Bo Xiao (Changzhou, China) and Ronglin Linghu (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a speaker which improves acoustic performances and includes a frame, a vibration system, a magnetic circuit system, a front cover, a sealing diaphragm, and a sound outlet. The vibration system includes an upper diaphragm, a lower diaphragm in an annular shape, a skeleton, and a voice coil. The skeleton includes an annular enclosure wall arranged between the frame and the magnetic circuit system. The lower dia...