## 3 The Production of a Noise Study for the Evaluation of Construction Site Noise
### A Case Study--Assessment of Noise from the Construction of an Office Building
#### 3.2.5 Noise Calculations
Measures: The fulfilment of the hygiene limit for all measurement points can only be ensured by shortening the pile-driving work period. With fencing, the work period is to be shortened to 7.5 h = 450 min/day, while without fencing the duration should be 1 h = 60 min/day. The position of the piling rig in the position oriented towards the developed area on Cernovicka St. is in Figure 14 and the resulting values in Table 16. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Height**} & \multirow{2}{*}{**Coordinates**} & \multicolumn{2}{c}{**LAeq (dB)**} \\ \cline{3-5}  & & & **Industry** & **Total** \\ \hline
1 & 1.5 & 203.3 & 132.8 & 48.9 & 48.9 \\
2 & 1.5 & 173.7 & 139.2 & 62.8 & 62.8 \\
3 & 1.5 & 148.9 & 146.5 & 50.2 & 50.2 \\
4 & 1.5 & 184.4 & 105.0 & **66.7** & 66.7 \\
5 & 1.5 & 143.1 & 113.3 & 56.6 & 56.6 \\
6 & 1.5 & 150.2 & 119.9 & 54.6 & 54.6 \\
7 & 1.5 & 185.0 & 117.3 & 58.2 & 58.2 \\
8 & 1.5 & 207.9 & 111.4 & 48.8 & 48.8 \\ \hline \hline \end{tabular}
\end{table} 
Table 15: Table of points from the calculation of measured points for earthworks with construction site fencing and a solid gate in the investigated area. Figure 13: Colour map of isophone bands after considering acoustically significant elements with construction site fencing and a solid gate for pile-driving work in the investigated area. The hygiene limit values are exceeded at points 2, 4, 5, 6, 7. Even the furthest position of the machines from the measurement points does not meet the limit without additional measures. Measures: The fulfilment of the hygiene limit for all measurement points can only be ensured by shortening the pile-driving work period. With fencing, the pile-driving work period is to be shortened to 7.5 h = 450 min/day and without fencing the duration should be 1 h = 60 min/day. position of machines with the expected layout inside the construction site. The hygiene limit values are exceeded at points 4, 5, 6, 7. Measures: Equip the building site with solid fencing for the stage in question. The height of the fencing is 1.8 m with solid gate wings at the entrance to the construction site. Acoustic situation with site fencing and full-area gate in Figure 16, resulting values in Table 19.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**No. **} & \multirow{2}{*}{**Height**} & \multicolumn{2}{c}{**Coordinates**} & \multicolumn{4}{c}{**LA\({}_{\text{eq}}\) (dB)**} \\ \cline{3-6}  & & & **Industry** & **Total** & **Previous** \\ \hline
1 & 1.5 & 203.3 & 132.8 & 41.5 & 41.5 & 41.5 \\
2 & 1.5 & 173.7 & 139.2 & 42.1 & 42.1 & 42.1 \\
3 & 1.5 & 1  
The machines are positioned in the riskiest location oriented towards the developed area on Mirova St, considered with fencing, which is always erected in the superstructure construction stage. In the case that solid fencing is used, the hygiene limits for the superstructure construction stage are fulfilled. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Height**} & \multicolumn{3}{c}{**Coordinates**} & \multicolumn{2}{c}{**LA\({}_{\text{eq}}\) (dB)**} \\ \cline{2-6}  & & & **Industry** & **Total** \\ \hline
1 & 1.5 & 203.3 & 132.8 & 40.8 & 40.8 \\
2 & 1.5 & 173.7 & 139.2 & 53.8 & 53.8 \\
3 & 1.5 & 148.9 & 146.5 & 44.0 & 44.0 \\
4 & 1.5 & 184.4 & 105.0 & 58.5 & 58.5 \\
5 & 1.5 & 143.1 & 113.3 & 64.3 & 64.3 \\
6 & 1.5 & 150.2 & 119.9 & 52.0 & 52.0 \\
7 & 1.5 & 185.0 & 117.3 & 45.0 & 45.0 \\
8 & 1.5 & 207.9 & 111.4 & 41.7 & 41.7 \\ \hline \hline \end{tabular}
\end{table} 
Table 22: Table of points from the calculation of measured points for superstructure construction with construction site fencing and a solid gate in the investigated area, with the positions of machines inside the construction site. Figure 18: Colour map of isophone bands after considering acoustically significant elements with construction site fencing and a solid gate for superstructure construction in the investigated area, with the position of machines inside the construction site.