Localization of Increased Noise at Operating Speed of a Passenger Wagon

Noise generated by railway wagons in operation is produced large numbers of noise sources. Although the transport considered to be environmental friendly, especially production CO2 emissions, one problems that should solved keep competitive and sustainable future. In EU, there a strong permanent legislation pressure on interior exterior reduction transport. last years Slovakia, besides modernization existing passenger fleet as cheaper option quality improvement, quite number coaches have been newly manufactured, too. The new design usually aimed at increased speed, higher travel comfort, which levels expected. However, not always designs meet all expectations. generation propagation complex system treated such from beginning. There are possibilities simulate structural natural frequencies predict vibrations sound these vibrations. real picture about fields can obtained only practical measurements. Simulations wagon’s mode shapes measurements using digital acoustic camera Soundcam done, showed for calculated speeds largest share chassis was radiated through floor wagon, expected, but ceiling wagon. To improve properties wagon it proposed use high-volume textile insulation paper briefly presents modern research approaches search ways reduce internal selected used normal Slovak railways.