ALEXANDRIA, Va., June 16 -- United States Patent no. 12,659,661, issued on June 16, was assigned to DENSO Corp. (Kariya-city, Japan).
"Sound conversion device" was invented by Tetsuto Kawai (Kariya-city, Japan) and Kazuaki Mawatari (Kariya-city, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sound conversion device includes a sound acquisition circuit that acquires the operation sound including abnormal sound as a sound pressure time signal that is a signal indicating a change in sound pressure intensity over time, a signal conversion circuit that converts a signal corresponding to the sound pressure time signal into a frequency characteristic indicating an intensity of sound pressure for each freque...