  In the present paper, the material parameters of the isotropic relaxed
micromorphic model derived for a specific metamaterial in a previous
contribution are used to model its transmission properties. Specifically, the
reflection and transmission coefficients at an interface between a homogeneous
solid and the chosen metamaterial are analyzed by using both the relaxed
micromorphic model and a direct FEM implementation of the detailed
microstructure. The obtained results show an excellent agreement between the
transmission spectra derived via our enriched continuum model and those issued
by the direct FEM simulation. Such excellent agreement validates the indirect
measure of the material parameters and opens the way towards an efficient
meta-structural design.
