Manufactures provide different solutions of soundproof building elements.
The table below shows construction of selected elements and their transmission loss
which meets project requirements. Additionally floating floor construction insulates
inner space from the impact noise produced by the tram passing through the building
volume.
63
Transmission loss, dB
Frequency, Hz
500
1000
2000
125 250
4000
Window
8 | 0.51 PVB | 8 [20
AS]
10 | 0.51 PVB | 10 37 42 46 50 55 58
Floor slab
pre fab 200 | floating
RCC 50 38 44 52 55 60 65
Exterior
frame wall timber 38 50 53 65 77 80
Partition
wall timber
8000
R w ,
dB STC OITC
50 50 41
55 57
58 44
55
52
Table 4 Transmission losses of selected construction elements
NOISE AND VIBRATION ENGINEERING FOR RAIL TRANS-
PORT
Sound pressure level and vibration can be reduced not only by protecting
receiving structure, but also by improving systems of the transport infrastructure net-
work. Manufactures provide various types of solutions for each aspect (airborne noise,
impact noise, vibration, etc.) which could occur in rail constructions as well as in brake
system of the train | tram.
On the basis of the fact that noise study is done to ensure that required levels
of noise inside the building will be achieved even in extreme conditions which could
possibly happen on the site, only essential for the project installations are mentioned:
rail groove fillers, under ballast mats and track damping systems. Aside from list