In this paper, we focus on multi-layer core topology systems which consists in piling up layers made by different kind of cores and offers innovative solutions to periodic structures design. The main objective of this study is to analyze the phenomena occurring in these multilayer core topologies, and then compare the numerical models with experimental measurements while the effects of the phase shift on the STL will be investigated. The model is implemented using MATLAB and ANSYS apdl. The mass of the unit cell is taken as constraints to eliminate its influence on the STL and the compression modulus is calculated to verify the mechanical properties. To perform the experimental measurements, the samples are designed with CATIA and then made by an industrial 3D printer using the fused deposed model technic. An impedance tube is used to measure the STL and compare with the vibroacoustic phenomena.
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