ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,675, issued on Sept. 1.
"Railroad crossing warning system for enhanced route planning based on spectrogram analysis" was invented by Meet Patel (Happy Valley, Ore.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system for detection of trains at railroad crossings is provided comprising a field-deployed detection and reporting device. The device comprises a microphone, a communication module, a microprocessor, an application executing on the microprocessor. The application receives periodically generated samples of ambient sound captured by the microphone and performs Fast Fourier Transformation on data associated with the generated samples. The ap...