Acoustic Treatment Solution of the Technical Room …
141
Fig. 10 Results of the noise reduction calculation by applying different acoustic materials with a
lining surface 200 m 2
Fig. 11 Results of the noise reduction calculation by applying different acoustic materials with a
lining surface 150 m 2
Fourth case—lining surface of 100 m
2 . Reduction of the total noise reduction is
3.18 dB for the case of the polyurethane foam, 3.03 dB if rock wool us used, while
3.09 dB of reduction is gained when using metal perforated panels.
Table 2 gives comparative results of the application of different materials in the
four listed cases.
141
Fig. 10 Results of the noise reduction calculation by applying different acoustic materials with a
lining surface 200 m 2
Fig. 11 Results of the noise reduction calculation by applying different acoustic materials with a
lining surface 150 m 2
Fourth case—lining surface of 100 m
2 . Reduction of the total noise reduction is
3.18 dB for the case of the polyurethane foam, 3.03 dB if rock wool us used, while
3.09 dB of reduction is gained when using metal perforated panels.
Table 2 gives comparative results of the application of different materials in the
four listed cases.