I am using ANSYS 2020 R1. I am trying to compute the sound pressure inside a thin walled 6 sided steal box. I want to excite one side of the box with a force and compute the sound pressure inside the box. Can anyone tell me the general setup for this and boundary conditions. Does ANSYS view this an FSI problem, a harmonic acoustics problem or other? I have tried to setup the 6 sided box in modal and then harmonic response and then transfer this load to Harmonic acoustics but it doesnt seem to be working. Any suggestions or links to helpful tutorials would be greatly appreciated. Thanks.n