Or here you can check picture from my ray-tracer (download
here). You can see that although DW has it simplified, it catches all important features, like stronger signal above the layer, shape of the shadow zone and weaker signal below the layer.
In fact below the layer (outside shadow zone) the signal is not weaker (compare it with bottom limited situation), it is louder above the layer because sound is focused there.
I'm quite happy that DW has it more or less right. I expected worse results, as we know DW sometimes promises more than it meets (like torpedo wires, or sound model before 1.03).
