Hm .. with LWAMI mod I get about 40 SNR with no cavitation and 60 SNR with cavitation. I really think it should get more complex.
I tried to change screw pitch but I really got no reasonable behavior from that. It's complete mystery to me.
BUT ! FFG measures SNR in great way ! Some time ago I was trying to actually measure DW's sound propagation model, to draw transmission loss diagrams. But I was doing it in sub, and subs don't have such nice SNR display, I got no reasonable data and I gave it up.
I did some simple tests in FFG now and it will work ! So after I get some more time (will take few hours I guess), expect new insight into DW's sound propagation model.
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