I am studying the acoustics in solid barriers to minimize sound propagation in them. I was able to solve Helmholtz equation where the barrier is a homogeneous 3D solid plate.
The Question is: I want to solve the Helmholtz equation in a multi-layered plate where every layer is different in terms of several physical characteristics. I cant find quite a good source to help me do so. Any help please or perhaps directions
PS: I am using MATLAB(TM) to solve the equations numerically.