Why implement a lining inside a metallic casing, a metallic screen, a partition or an enclosure made of plasterboard or with wood sidings with a material being damping and sound absorbing (acoustic complex) to improve their acoustic performance?

A material being damping and absorbent (acoustic complex) can increase the sound reduction index and the sound insulation of a plate on which it is applied by combining in a single product requiring only a single application complementary properties damping (of the damping) and of absorption (of the absorbent).