ALEXANDRIA, Va., July 3 -- United States Patent no. 12,349,291, issued on July 1.
"Fault diagnostic apparatus using microphone" was invented by Jin Moon Noh (Gyeonggi-do, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fault diagnostic apparatus may include an upper case with a bottom having an opening, a lower case coupled to the bottom of the upper case, and a printed circuit board (PCB) substrate module including a substrate supported on an inner side of the upper case or the lower case, and a microphone disposed in the substrate adjacent to the vibration plate to generate a sensing signal of an acoustic wave by the vibration generated from the vibration plate. The lower case may have a vibra...