Worked example 2: Noise abatement wall GGU-GABION: System description (Ex. 2) GGU-GABION: Step 1 - Select analysis options and generate noise abatement wall (Ex. 2) GGU-GABION: Step 2 - Define material of gabion (Ex. 2) GGU-GABION: Step 3 - Analyse system (Ex. 2)