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[CAP_NJ]

In the theory guide is the general following definition:

And then after the derivation and some assumptions from the stokes FWH formulation it gives the following relations for the pressure fluctuation p' (T thickness and L loading term):

I dont get where it calculates the average pressure (like in the first relation p_0), which must be subtracted to get a fluctuation around zero???

There was a similiar post, but no answer yet.

https://innovationspace.ansys.com/forum/forums/topic/acoustic-pressure-calculation-les-fh-w/