Turbo noise macro

Barri

Hi,

Recently, I used CFX to model a small fan and would like to calculate the tonal noise. I used Turbo noise macro to get the tonal noise, but it does not seem to show the noise level lower then 20 db. In the acoustic experiment, I got the noise level about 15db in FFT plot.

How do I use Turbo noise macro to get the noise level lower then 20 db as the experiment data?

Thanks a lot.

Barri