Figure 4 Variations in noise indicator Lp depending on season.
Related Figures (11)
Fig. 1. Typical monitoring station. The noise data from all selected stations were analyzed and compared to noise mapping values obtained through calculations. The noise sources and road traffic data (estimated on the basis of short term measurements) of those monitoring stations are given in Table 1. The installation dates of stations are also shown in this table. The monitoring periods start at that dates and end on Janu- ary 31, 2010. Some drops in acquired data were noted during monitoring period due to temporary malfunctions of the system but they are negligible. The biggest positive differences (except differences for Ly) were recorded for the monitoring station ID 07 located 15 m from rail- way tracks (Lpen — 6.2 dB, Lp — 4.9 dB, Le - 6.7 dB and Ly - 6.4 cB). Even though dedicated measurements of train noise were per- formed and implemented when producing the noise maps (to dis- tinguish rather noisy trains utilized in Poland in comparison to those in western Europe), the measured noise levels were much higher than predicted. This situation is contrary to the monitoring Selected monitoring stations. Table 1 Noise indicators for the locations of selected monitoring stations obtained from the noise maps. Table 2 Fig. 2. Differences in noise indicators obtained from noise monitoring and from noise maps. Fig. 3. Variations in noise indicator Lpgn depending on season. Fig. 5. Variations in noise indicator L; depending on season. Fig. 6. Variations in noise indicator Ly depending on season. Fig. 7. Influence of days of the week on noise indicator Lpen. Fig. 8. Influence of days of the week on noise indicator Lp. Fig. 9. Influence of days of the week on noise indicator Lg. Fig. 10. Influence of days of the week on noise indicator Ly.
