Civil Engineering Reference
In-Depth Information
-10.0
Floor:
α
= 0.05
Scat. elements:
α
=0.01
q
= 0.025
-20.0
-30.0
Alpha for ceiling
0.10
0.25
0.50
0.75
0.95
-40.0
-50.0
-60.0
1.0
23 5 0 0 0
Distance (m)
10.0
100.0
Figure 4.23
The relative sound pressure level as a function of distance from a source in a “flat” room. The room
is 5 metres high.
The parameter on the curves is the absorption factor α for the ceiling.
-10.0
Ceiling:
α
= 0.50
Floor:
α
= 0.05
Scat. elements:
α
=0.01
-20.0
-30.0
Scatt. cross section
q
(m
-1
)
0.0
0.025
0.05
0.1
-40.0
-50.0
-60.0
1.0
23 5 0 0 0
Distance (m)
10.0
100.0
Figure 4.24
The relative sound pressure level as a function of distance from a source in a “flat” room. The room
is 5 metres high. The parameter on the curves is the scattering cross section
q
(m
-1
).
