ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,475,915, issued on Nov. 18, was assigned to Shenzhen Shokz Co. Ltd. (Shenzhen, China).

"Voice activity detection method and system, and voice enhancement method and system" was invented by Le Xiao (Shenzhen, China), Chengqian Zhang (Shenzhen, China), Fengyun Liao (Shenzhen, China) and Xin Qi (Shenzhen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A voice activity detection method and system and a voice enhancement method and system are provided. A voice presence probability of a target voice signal present in microphone signals may be determined by calculating a linear correlation between a signal subspace where the microphone signals are locate...