# Modernization of Heavy Loaded Tram Radial Effect on Noise and Vibration
## 3 Noise and Vibration Effects of Modernisation
### Experimental Measurement on Stur Street
#### 3.1.3 Results of Experimental Noise Measurements
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & \multicolumn{5}{c}{**Bratislava–Stür Street**} \\ \hline
**Measurement** & **Direction/Type** & **Start of Measurement** & **Elapsed Time (s)** & \(L_{Aeq}\) & \(L_{Cpeak}\) & \(L_{AFmax}\) & \(L_{AFmin}\) \\
**Number/Track** & **Direction/Type** & **Start of Measurement** & **Elapsed Time (s)** & **(dB)** & **(dB)** & **(dB)** & **(dB)** \\ \hline
**1/K1** & **CE/N** & **10**:**26**:**57 & **08** & **74**:**15 & **103**:**01 & **80**:**37 & **63**:**06 \\ \hline
**2****(*****)**/K1 + K2** & **CE/PE/O** & **10**:**30**:**39 & **11** & **72**:**36 & **100**:**48 & **77**:**51 & **60**:**18 \\ \hline
**3/K1** & **CE/N** & **10**:**33**:**38 & **12** & **71**:**01 & **101**:**03 & **78**:**01 & **59**:**70 \\
**4/K1** & **CE/N** & **10**:**37**:**29 & **10** & **71**:**60 & **100**:**89 & **80**:**16 & **60**:**96 \\
**5/K2** & **PE/N** & **10**:**42**:**27 & **13** & **72**:**00 & **96**:**65 & **77**:**46 & **62**:**67 \\
**6/K1** & **CE/O** & **10**:**48**:**24 & **13** & **73**:**18 & **101**:**05 & **81**:**52 & **59**:**44 \\
**7/K1** & **CE/O** & **10**:**58**:**17 & **12** & **71**:**32 & **93**:**94 & **76**:**13 & **60**:**62 \\
**8/K2** & **PE/O** & **11**:**01**:**25 & **10** & **72**:**24 & **95**:**44 & **76**:**39 & **62**:**72 \\
**9/K1** & **CE/O** & **11**:**07**:**42 & **09** & **73**:**04 & **98**:**45 & **78**:**91 & **59**:**97 \\
**10/K2** & **PE/N** & **11**:**11**:**00 & **12** & **72**:**90 & **95**:**12 & **78**:**67 & **59**:**82 \\
**11/K1** & **CE/N** & **11**:**13**:**40 & **11** & **73**:**19 & **100**:**24 & **79**:**69 & **60**:**77 \\
**12/K1** & **CE/O** & **11**:**18**:**11 & **10** & **75**:**56 & **101**:**19 & **81**:**58 & **66**:**39 \\ \hline \hline \end{tabular}  
* O, N: old type of Tram, new type of tram; PE–CE: direction from Pettzalka to Centre; CE–PE: direction from Centre to Pettzalka; \({}^{(\star)}\) combination.  
\end{table} 
Table 2: Time history of measurements and overview of values of measured quantities of the whole record in **B1H**. Figure 7: Frequency spectrum of values of noise levels of selected measurements (from above \(LZF_{max}\), \(LZ_{max}\), \(LZ_{max}\), \(LZ_{eq}\), \(LZ_{min}\), \(LZF_{min}\)). Figure 8: Vibration velocity time history \(v(t)\) and power spectral density \(G_{ii}\) of the vibration velocity recording for measurements for new types of trans. Figure 9: Time history of values of noise levels \(L_{Aeq}\) of selected measurements. The extreme values of the noise levels \(L_{Aeq}\) measured in this location can be identified by the track that the terms moved on and by the older or a new type of tram. * track K1 (\(\approx\)3 m from point **B1H**) in the case of older types of terms, the highest value of the noise level was measured in measurement no. 12--\(L_{Aeq}\) = 75.56 dB (red colour in Table 2). * track K1 (\(\approx\)3 m from point **B1H**) in the case of newer types of terms, the highest value of the noise level was measured in measurement no. 1--\(L_{Aeq}\) = 74.15 dB (red colour in Table 2). * track K2 (\(\approx\)5.2 m from **B1H**) in the case of older types of terms, the highest value of the noise level was measured in measurement no. 8--\(L_{Aeq}\) = 72.24 dB (green colour in Table 2). * track K2 (\(\approx\)5.2 m from **B1H**) in the case of newer types of terms, the highest value of the noise level was measured in measurement no. 10--\(L_{Aeq}\) = 72.90 dB (green colour in Table 2).