CadnaA Demo Version
A fully featured CadnaA demo version is available free of charge. 
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CadnaA Users
CadnaA is successfully applied in many different industries in more than 60 countries all over the world. more
Noise Mapping
CadnaA is the most successful noise calculation and noise mapping software available. more
Screening by Terrain
Terrain causes screening. This section illustrates the differences of using just the available contour lines or the generated triangulation lines for screening purposes. CadnaA offers the flexibility to choose one of these options.
The whole chapter 
Basics and the section Modeling Terrain from this chapter suffice as preconditions for understanding screening effects in CadnaA. The chapter Noise Mapping may contribute to the understanding, but is not required.
Direct Links to the Videos
Screening Effects by Contour Lines
Creating a Scene to Illustrate Screening by Triangulation Lines