Sim Flow uses a ray tracing algorithim to model the progation of gray body radiation to compute view factors to enable the computation of the radiant heat transfer. I am not a sound guy so not sure if this approach can lead to a sensible approximation or not however no wave modeling is done so that part is out so any wave interactions will not be modeled - just reflection in my estimation and even then you only get to set one emssivity value (0 to 1). Effects that could be approximated by rays might have a chance such as bulk energy (1/R^3 decay). It all seems a stretch though at first blush. Also the fluid volumes are non absobing so decay due to medium damping won't be modeled either. In the HVAC module you can get spectral sensitivities and absorption in solid materials but it still seems a stretch. You should consult the tecnical reference to see if the details of the energy handling will provide any kind of sensible approximation.
First of all, thank you for your reaction.
The ray tracing model should be sufficient for my/most modelling, as the soundsource creates a composite soundwave, and not a pattern with a clearly distinguishable major frequency/wavelength.
Wave interaction is not (yet) my main problem (though I am curious to see if there are options for this for later on)
Setting an energy decay rate at the source might work, had not thought about that, wil give that a try and get back if this works.