ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,230,291, issued on Feb. 18, was assigned to Sonos Inc. (Santa Barbara, Calif.).

"Voice detection optimization using sound metadata" was invented by Connor Kristopher Smith (New Hudson, Mich.), Kurt Thomas Soto (Ventura, Calif.) and Charles Conor Sleith (Waltham, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods for optimizing voice detection via a network microphone device are disclosed herein. In one example, individual microphones of a network microphone device detect sound. The sound data is captured in a first buffer and analyzed to detect a trigger event. Metadata associated with the sound data is captured in a second buffer ...