NMPB-Fer 2008
Dialog Railway (for NMPB-Fer 2008): spectrum is linear, sum-level is A-weighted („Tot-A“).
Emission Lw’
unweighted (linear) sound power level per unit length (1 meter) and per third-octave (for periods Day/Evening/Night)
Total-A
A-weighted sum level per period
vmax (km/h)
When specifying a track-relevant maximum speed vmax the train speed will be adjusted if necessary. In the calculation the smaller of both values is used.
Train Classes and Penalties
With this option activated, the types of trains and train classes, numbers of trains and corrections, can be edited locally, or an existing list with number of trains can be selected. CadnaA will automatically calculate the emission level from the specified values.
Note
The emission data for calculation according to NMPB-Fer 2008 is available from a separate XML-file containing the relevant train classes.
For import of NMPB-Fer 2008 specific train classes (format „NMPB08 Trains“) see Special Formats.
Type of Track
Track Correction (dB): The entered value will be added to the emission spectrum (for all octaves).
Slab Track (Gs=0)
With this option active, a ground factor Gs=0 is used for the track area. With the option inactive, the ground factor is Gs=1 (i.e. with ballast).
Local Train List
Provided the train classes for NMPB-Fer 2008 have been imported the local train list can be edited.
Train Type
The train type is selected from the list Train Types on the Library (local)|Train Classes. By this selection all _relevant parameters are specified.
Number of Trains Day/Evening/Night
Numbers of trains during each period. With the same numbers of trains for time periods D/E/N the same power level L’w,i D/E/N results (see also chapter NMPB-Fer 2008).
Speed v (km/h)
relevant speed of trains (in km/h)
Emission Lw,i (dB)
The emission level (sound power per unit length) L’w,i for a train class resulting from the specified parameter is displayed here.