## 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
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Height**} & \multicolumn{2}{c}{**Coordinates**} & \multicolumn{2}{c}{**LAeq (dB)**} \\ \cline{3-6}  & & & **Industry** & **Total** \\ \hline
1 & 1.5 & 203.3 & 132.8 & 40.9 & 40.9 \\
2 & 1.5 & 173.7 & 139.2 & 57.6 & 57.6 \\
3 & 1.5 & 148.9 & 146.5 & 42.2 & 42.2 \\
4 & 1.5 & 184.4 & 105.0 & 68.0 & **68.0** \\
5 & 1.5 & 143.1 & 113.3 & 67.4 & **67.4** \\
6 & 1.5 & 150.2 & 119.9 & 66.6 & **66.6** \\
7 & 1.5 & 185.0 & 117.3 & 65.1 & **65.1** \\
8 & 1.5 & 207.9 & 111.4 & 41.4 & 41.4 \\ \hline \hline \end{tabular}
\end{table} 
Table 11: Table of points from the calculation of measured points for earthworks in the investigated area. Figure 11: Colour map of isophone bands after the consideration of acoustically significant elements with construction site fencing and a solid gate for earthworks in the investigated area. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Height**} & \multirow{2}{*}{**Coordinates**} & \multicolumn{2}{c}{**LAeq (dB)**} \\ \cline{3-6}  & & & **Industry** & **Total** & **Previous** \\ \hline
1 & 1.5 & 203.3 & 132.8 & 40.9 & 40.9 & 40.9 \\
2 & 1.5 & 173.7 & 139.2 & 42.0 & 42.0 & 57.6 \\
3 & 1.5 & 148.9 & 146.5 & 42.2 & 42.2 & 42.2 \\ \hline
4 & 1.5 & 184.4 & 105.0 & 44.7 & 44.7 & 68.0 \\
5 & 1.5 & 143.1 & 113.3 & 44.2 & 44.2 & 67.4 \\
6 & 1.5 & 150.2 & 119.9 & 44.3 & 44.3 & 66.6 \\
7 & 1.5 & 185.0 & 117.3 & 42.5 & 42.5 & 65.1 \\
8 & 1.5 & 207.9 & 111.4 & 41.5 & 41.5 & 41.4 \\ \hline \hline \end{tabular}
\end{table} 
Table 12: Table of calculated values of measured points for earthworks with construction site fencing and a solid gate in the investigated area. After this measure is taken, the hygiene limits for the earthworks stage are fulfilled. Without fencing the work period has to be shortened to 6.5 h = 390 min/day. Calculation 4: Foundation of the Building, Deep Foundations--Pile-Driving, Machine: 4, 3, 1  
The following is a modeling of the acoustic situation and calculations for noise sources listed in Table 13.  
The position of the piling rig in Figure 12 is considered the riskiest position with regard to the developed areas of Mirova St., the resulting values are shown in Table 14. \begin{table}
\begin{tabular}{c c c} \hline \hline  & **Sources of Noise** & **Sound Power Level (dB)** \\ \hline
1. & Trucks & 90 \\
3. & Skid-steer loaders & 101 \\
4. & Crawler piling rig & 110 \\ \hline \hline \end{tabular}
\end{table} 
Table 13: Expected sources of construction noise. Figure 12: Colour map of isophone bands after considering acoustically significant elements (without construction site fencing or a solid gate) for pile-driving work in the investigated area. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Height**} & \multirow{2}{*}{**Coordinates**} & \multicolumn{3}{c}{**LAeq (dB)**} \\ \cline{3-6}  & & & **Industry** & **Total** & **Previous** \\ \hline
1 & 1.5 & 203.3 & 132.8 & 48.6 & 48.6 & 48.9 \\
2 & 1.5 & 173.7 & 139.2 & 71.8 & 71.8 & 62.8 \\
3 & 1.5 & 148.9 & 146.5 & 50.2 & 50.2 & 50.2 \\
4 & 1.5 & 184.4 & 105.0 & 77.2 & **77.2** & 66.7 \\
5 & 1.5 & 143.1 & 113.3 & 77.6 & **77.6** & 56.6 \\
6 & 1.5 & 150.2 & 119.9 & 77.7 & **77.7** & 54.6 \\
7 & 1.5 & 185.0 & 117.3 & 73.2 & **73.2** & 58.2 \\
8 & 1.5 & 207.9 & 111.4 & 49.1 & 49.1 & 48.8 \\ \hline \hline \end{tabular}
\end{table} 
Table 14: Table of points from the calculation of measured points for earthworks without construction site fencing or a solid gate for pile-driving work in the investigated area. The hygiene limit values are exceeded at points 2, 4, 5, 6, 7. Measures: Equip the building site with solid fencing for the stage in question. The height of fencing is 1.8 m with solid gate wings at the entrance to the construction site. Figure 13 shows the same acoustic situation but the added fencing of the construction site, Table 15 shows the resulting values. The hygiene limit value was exceeded at point 4.