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Basics.
Object Modifications.
Obstacles.
- Screening and Reflection.
- Projection.
- Lateral Diffraction.
- Absorption.
  - Frequency-Independent Ground Attenuation.
  - Frequency-Dependent Ground Attenuation.
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DTM.
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Extended Analysis.
Import and Export.
The Plot Designer.
Noise Mapping.
Distributed Calculation.

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Frequency-Independent Ground Attenuation