US Patent Issued on April 7 for "Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects" (California Inventor)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,597,900, issued on April 7.

"Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects" was invented by Ronald Quan (Cupertino, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system is provided to analyze distortion in an electronic or electromechanical device, which may include testing with one or more modulated signals and/or with one or more demodulators. In one embodiment a change in pitch (or frequency) is measured at an output of the device. One or more signals from a demodulator output may be measured for an amplitude, noise, phase, aliasing, spurious signal, an...