Amplitude and frequency characteristics of acoustic field influenced by tram

Tram, as a light rail vehicle, is a very personalized by operator. It is typically that on one tram net different types of trams are operated. However, regardless of the manufacturer and the product generation, trams operate in urban area influenced on the acoustic climate of City.The article presents the customized and unstandardized acoustic research related to the evaluation of noise generated by different types of tram. In the tests single and multi-microphones system was used for description and detailed analysis of acoustic field generated by tram. All action was focused on bogies as a most important noise source. Paper includes methodology of the research with a comparative analysis of trams with bogie covers and without of them. Description of the acoustic field phenomenon with matrix measurements was presented in two domains: amplitude and frequency. The results were related to the normative measurements prepared according to the methodology described in ISO 3095.