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Porous materials are usually employed since they are a well-known and effective passive approach. This class of material converts the acoustical energy into heat by viscous and thermal effects. That is, this transduction is carried out by the particles' friction and movement inside the pores. Considering this scenario, it is clear that characterization of porous materials plays an important role in noise control. A common way to estimate their properties is via Kundt's Tube measurements, wherefatcat:tispt655qncrvmltngjidsts74