Noise due to electro magnetic forces i an motor

Altair Community Member
Updated by Naresh_20479
Hi
I want to find out the noise generated due to the electromagnetic forces between stator and rotor of a motor.
i imported forces from flux and solved a frequency response simulation in Optistruct.
Now I want to find out what is the noise generated VS Frequency of forces.
I have generated ERP results but I am not sure what exactly ERP represents and how nise is related to it.
Colud any one help me with methods of noise calculation rom frequence response analysis.?