AM, EM, AQ, BA, ASW - IOM
page: 12/64
Ing.Ji
ř
í Jiránek
Barrier attenuation factor:
INSTALLATION ON A FLAT ROOF WITH DAMPENING WALL
EVALUATION POINT
EVALUATION POINT
BUILDING CORNER AS A NOISE BARRIER
EVALUATION POINT
EVALUATION POINT
BARRIER
NOISE SOURCE
L=L
1
+L
2
-D
L
1
+L
2
– Distance between the noise source and evaluation point around a barrier
D
– Direct distance between the noise source and evaluation point
FB
– Attenuation factor
L
m
0.15
0.3
0.6
0.9
1.8
3.7
FB
dBA
-4
-7
-10
-12
-15
-17