Ffowcs Williams & Hawkings Model Query
 

Hi,
I am running an acoustic analysis on some different geometrys and using the FWH model to compute pressure signals, i am then post processing them in the FLUENT FFT GUI, the FFT's are working fine but the dominant frequency i am getting is very low, i am wondering if my acoustic reference pressure is wrong. the default value is 2e-05Pa, i do not know how to calculate this value for my own analysis. If anyone has experience in this area their help would be greatly appreciated.

Thanks
Paul.