In excel i found differend equations for each regresion lines (logarithmic scale)
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Forgot to say, the cavitation will add a further 15 units to the current noise.
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I know that APU on Surfs also adds some units for current noise. Do you remember how much?
BTW: I think APU should gives differend acoustic signature than main propulsion. Also Prairie-Masker system probably is not simulated in DW
