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They are produced from a special quality of foamed flexible polyester-based polyurethane, with a homogeneous mass and an optimal percentage of closed cells for high sound-absorbing performance
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The polyhedrons of the cells have 20-30% open walls so that the air carrying the acoustic wave can enter. At the same time, they are 70-80% closed with elastic membranes to absorb the energy of the air molecules resulting in sound absorptionTheir special feature is the wavy surface configuration that provides multiple active sound-absorbing surface compared to flat products of the same average thickness
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