Developing Assumptions for the Tram Noise Attenuation Passive System Using the Noise Maps Analysis Method

The paper presents experimental research carried out to determine the possible actions reduce noise generated by trams in a highly urbanised area. A few design strategies affecting tram ride quality have been presented – especially aspect of acoustic phenomena. Main sources were characterised. includes selected results comprehensive studies pass-by test based on authors’ methodology. tests various types recognise phenomena characteristic for rolling stock system. measurements analysed both field amplitudes maps and respect frequencies spectra. indicated as important issue demanding taking some order its level. In this area, elements application individual attenuation solutions, i.e. at source during propagation, presented. used input data assumptions passive system, which was final outcome study. Dedicated external dampers case wheel rail pairs, where dominant power is emitted. properties bogie area side covers redeveloped hamper novel application. indicate measurable benefits from applied solutions reduction.