Acoustic Treatment Solution of the Technical Room …
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Fig. 6 Graphical representation of the technical room using metal perforated panel for acoustic
treatment
Fig. 7 Cross-section of the metal perforated panel
4 Results of the Research
During the investigation of the optimal solution of the given task (highest noise reduction while using less material), described mathematical approach (2, 3, 4) has been
used and applied for cases of surfaces of 240 m
2 , 200 m
2 , 150 m
2 , and 100 m
2 lined
with proposed absorption material. Results of the calculation have been presented in
Figs. 9, 10, 11, and 12.
First case—lining surface of 240 m
2 . Reduction of the equivalent noise level for the
polyurethane treatment is 5.40 dB, and for the treatment with rock wool it is 5.34 dB,
while for the metal perforated panel, it is 5.40 dB. Difference between calculated