## 4 Discussion  
From the presented case study, it is clear that there are many aspects to the assessment of a specific investment and that the quality of the results depends on the quality of the input data. The modelling of the future noise situation in an area where construction site equipment is to be deployed provides a visual and numerical evaluation of noise risk. The trend in changes in the sound pressure values at a measured point when possible measures are used indicates the correct path to the overall conception of the noise study to its producer. Only when several assessed points are evaluated for the effectiveness of anti-noise measures can a proposal be made to include suitable anti-noise measures in the construction plan.  
We require full use of working hours during construction. In Table 26, we see a reduction in the use of construction machinery during the work shift, both with the use of active measures and without their use, when we ensure compliance with the limit by shortening the time of work. For the present case study, limiting work would mean using up to 44.35%. In the case of elaboration of a study, design and use of anti-noise measures, it can be increased to 81.25%.  
In the future, it will be possible to approach other research goals. If there are several case studies, the effectiveness of noise barriers can be analysed, scientists are already addressing this issue in a broader context [33]. Some also address shape adjustment options for greater efficiency of these walls [34, 35, 36, 37]. The procedures in the presented case study can also be used to model noise on the construction site in order to determine the noise load of construction managers, which is not dedicated technical or legislative attention [9, 36]. In the Czech Republic, noise limit values are compared only for direct operation of work machines and for persons in residential buildings in the vicinity of the construction site, not for construction managers. Future analyses should also focus on the use of soundproof barriers and covers for construction machinery [12, 15, 24, 35, 38] and multicriteria optimization of own construction schedules [27, 39]. There are existing studies on the layout of the construction site in connection with the main construction machines [3, 4, 40, 41, 42, 43], but very little account is taken of machine noise in the optimization [2, 5, 44]. It is possible to continue the research of noise from construction and for the transmission inside the building and the subsequent propagation of noise and vibration in the indoor environment of buildings [23, 24, 45, 46, 47, 48].  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Calculation Number** & \multicolumn{4}{c}{**Duration of Work during the Day (Minutes)**} \\ \hline  & \multicolumn{2}{c}{**Required**} & \multicolumn{2}{c}{**Without Active Measures**} & \multicolumn{2}{c}{**With Active Measures**} \\ \hline
1 & 480 & 100\% & 60 & 12.50\% & 420 & 87.50\% \\
2 & 480 & 100\% & 180 & 37.50\% & 180 & 37.50\% \\
3 & 480 & 100\% & 390 & 81.25\% & 480 & 100.00\% \\
4 & 480 & 100\% & 60 & 12.50\% & 450 & 93.75\% \\
5 & 480 & 100\% & 210 & 43.75\% & 480 & 100.00\% \\
6 & 480 & 100\% & 480 & 100.00\% & 480 & 100.00\% \\
7 & 480 & 100\% & \(110\) & 22.92\% & 240 & 50.00\% \\
**TOTAL** & \multicolumn{2}{c}{100\%} & \multicolumn{2}{c}{44.35\%} & \multicolumn{2}{c}{81.25\%} \\ \hline \hline \end{tabular}
\end{table}
Table 26: Working time with the machine during the work shift.