Reply To: What is the reason of Absorbtion Coefficient too small or zero on Impedance Tube Simulation?

[nurionur]

I got it.
But elastic behaviour also affect absorption coefficient, doesn't it? When I add isotropic material properties such as modulus elasticity and poisson ratio for the same material, both results are exactly same. In order to consider elastic behaviour for absorption coefficient, I think we should assign FOAM as a physical body, shouldnt we?