It's probably a silly question, but please explain what is wrong.
The truth is, I use QGIS, so I made a python script that outputs my road, traffic and buildings shapefiles into the sql sentences that are described in the noisemap quick start section. I feed the result into orbisgis and then I export the resulting contouring_noise_map as shp back into Qgis.
The reason I use QGIS and python is because I know how use them WELL.
Orbis doesn't have extensive help (it's a bit elitist if I may say), plus I prefer mastering ONE gis system rather than learning others.
For me it's just a tool and I have to choose the one that seems likely having more potential and future.