ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,532,123, issued on Jan. 20, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Speaker" was invented by Zhaoyu Yin (Changzhou, China) and Zhizhu Chen (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a speaker including a first frame, a second frame, a first vibration system, a second vibration system, and a magnetic circuit system. The first vibration system includes a first diaphragm and a first voice coil. The second vibration system includes a second diaphragm and a second voice coil. The magnetic circuit system includes a first main magnet, first auxiliary magnets, a second main mag...