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Aeroacoustic signals off by 20-30db compared to experimental data

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Old   August 6, 2013, 18:15
Default Aeroacoustic signals off by 20-30db compared to experimental data
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I am doing a noise simulation of an isolated airfoil, and when I looked at the results today they seem to be off by 20-30db. By character the plots are the same for experimental and cfd data, just offset. Do you know if there is something I might be forgetting about that is causing this?

Also it looks like the signals calculated in Fluent have to be A-weighted before being compared with microphone data, is that right?

I've uploaded some plots for reference here: http://imageupper.com/g/?S020001004U1375827073108508
(the ones where the SPL is higher are from the experiment)

edit: And here are all on one: experiment, simulation, simulation after a-weighting, and with +30dB.

Last edited by zbyhu; August 6, 2013 at 19:48.
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