Mecanum develops softwares to characterize and model acoustic materials.
FOAM-X software is a very powerfull tool to extract physical parameters of acoustic materials. Both indirect and inverse methods can be used to extract properties of any material.
Once you know your physical parameters you can simulate your material using NOVA. NOVA can either simulate a single layer or multilayer material.
ADNR is used to simulate complex plates like structures. You can download the software for free.
MATLAB SCRIPTS (FREE)
Matlab Scripts of equivalent fluids. You can download the software for free.