## 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
Calculation 7: Final Landscaping, Machine: 8, 10  
For the noise sources listed in Table 23, the acoustic situation is modeled in Figure 19, the calculation is given in Table 24.  
The machines employed for final landscaping do not have to (but can) be deployed simultaneously. The hygiene limit values are exceeded at points 4, 5, 6, 7. Measures: Separate deployment of machines according to Figures 20 and 21. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Height**} & \multirow{2}{*}{**Coordinates**} & \multicolumn{4}{c}{**LA\({}_{\textbf{eq}}\) (dB)**} \\ \cline{3-6}  & & & **Industry** & **Total** & **Previous** \\ \hline
1 & 1.5 & 203.3 & 132.8 & 40.7 & 40.7 & 40.8 \\
2 & 1.5 & 173.7 & 139.2 & 58.1 & 58.1 & 65.6 \\
3 & 1.5 & 148.9 & 146.5 & 44.0 & 44.0 & 57.9 \\
4 & 1.5 & 184.4 & 105.0 & 70.4 & **70.4** & 68.9 \\
5 & 1.5 & 143.1 & 113.3 & 67.2 & **67.2** & 74.1 \\
6 & 1.5 & 150.2 & 119.9 & 67.4 & **67.4** & 74.2 \\
7 & 1.5 & 185.0 & 117.3 & 68.3 & **68.3** & 45.0 \\
8 & 1.5 & 207.9 & 111.4 & 43.1 & 43.1 & 41.7 \\ \hline \hline \end{tabular}
\end{table} 
Table 24: Table of points from the calculation of measured points for final landscaping without construction site fencing or a solid gate for the investigated area, with the deployment of both machines. Figure 19: Colour map of isophone bands after considering acoustically significant elements (without construction site fencing or a solid gate) for the final landscaping in the investigated area, with the deployment of both machines. The hygiene limits for the final landscaping stage are fulfilled if the machine for the transfer and deposition of soil is used on its own. However, if a vibrating roller is simultaneously deployed for the final landscaping work, or even if it is operated independently, the measures involving just independent deployment will not be sufficient to keep noise within the limit values. Figure 21: Colour map of isophone bands after considering acoustically significant elements (without construction site fencing or a solid gate) for final landscaping in the area in question, with the deployment of only the compaction machine. Figure 20: Colour map of isophone bands after considering acoustically significant elements (without construction site fencing or a solid gate) for final landscaping in the investigated area, with the deployment of only the machine for the transfer and deposition of soil. Measures: Leave the 1.8 m solid fencing with solid entrance gate wings at the construction site erected for the period of final landscaping according to Figure 22 with output values in Table 25.  
The limit value was exceeded at point 4. Measures: If the vibrating roller is used, its activities should be separated from the deployment of other plant, the solid fencing erected previously should be left up and the deployment of the roller should be shortened to 4 h = 240 min/day. Without other measures, shorten the duration of processes to 110 min.