ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,754,987, issued on Oct. 6, was assigned to Google LLC (Mountain View, Calif.).

"Authentication using active acoustic sensing" was invented by Patrick Muller Amihood (Palo Alto, Calif.), Xiaoran Fan (Irvine, Calif.) and Cody Wortham (San Francisco).

According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques and apparatuses are described that perform authentication using active acoustic sensing. During active acoustic sensing, a hearable transmits and receives at least one ultrasound signal, which propagates within a person's ear canal. The ultrasound signal contains information that is related to the vocalization as well as additional contextual information ...