ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,386,024, issued on Aug. 12, was assigned to AXIS AB (Lund, Sweden).
"System and method for determining a distance between networked electronic devices each comprising a loudspeaker and a microphone" was invented by Gillis Oldfeldt (Lund, Sweden) and Frida Johnsson (Lund, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system determines a distance between networked electronic devices. A first sound signal comprising a first measuring wave having a first frequency carried on a first carrier wave having a first carrier frequency higher than the first frequency is emitted by a first device. A second device receives the first sound signal, and define...