ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,507,016, issued on Dec. 23, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Sounding device" was invented by Ronglin Linghu (Changzhou, China) and Bo Xiao (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides a sounding device, including a basket frame, a vibration system including a diaphragm, a first voice coil and a second voice coil, and a magnetic circuit system; the first voice coil and the second voice coil are inserted and suspended within a first magnetic gap and a second magnetic gap, respectively. The magnetic circuit system includes a lower clamping plate, a first center mag...