Validation of shifted cell approach for the modelling of acoustic properties of porous materials embedding periodic inclusions

The design based on periodic elements can be a powerful strategy for the achievement of lightweight sound packages and can represent a useful solution for manufacturing aspects. The inclusion of vibroacoustic design rules, at early stage of the product development, is a feasible and interesting research target; in fact, the use of porous media with periodic inclusions can improve the dynamic filtering effects thus offering several possibilities of applications in the engineering fields where both weight and space, as well as vibroacoustic integrity and comfort, still represent critical issues. Indeed, although porous materials are commonly used for