DS DS/EN 16272-3-1
DS DSEN 16272-3-1 2012-DEC-03 Ralway applcatons - Track - Nose barrers and related devces actng on arborne sound propagaton - Test method for determnng the acoustc performance - Part 3-1 Normalzed ralway nose spectrum and sngle number ratngs for dffuse feld applcatons