ITS answers question related to the improvement of the performance of an existing enclosure (acoustic hood) / of an existing partition for workers protection.
Why implement a lining of a metallic casing, of a metallic duct, a pipe, of a plasterboard partition, of a partition with wood sidings with a damping material to improve their acoustic performance?
A damping material can increase the sound reduction index of a plate on which it is applied.
Thanks to its damping properties, the damping material:
- reduces - other things being equal - the decrease of the sound reduction index (limits the sound transmission factor) of a thin plate for frequencies corresponding to the phenomenon of coincidence
- limits the impact noise associated with the fall of parts (containers, gutters ...) and/or limit the impact noise associated with material being ejected at high speed (duct for waste evacuation, for shavings in suction networks ...).
With its surface density, the damping material increases - all other things being equal - the sound reduction index (limits the sound transmission factor) of a thin plate at frequencies for wich the mass law is applicable.
Why implement a lining inside a metallic casing, a metallic screen, a partition or an enclosure made of plasterboard or with wood sidings with an absorbent material to improve their acoustic performance?
Absorbent material can increase the sound insulation of a plate on which it is applied (on noise source side).
With its absorption property, the absorbent limits the increase of sound pressure level on noise source side that would occur if the support alone (metal housing, plasterboard, wood plate) was interposed.
With its surface density (if it is not negligible), the absorbent material increases - all other things being equal - the sound reduction index (limits the sound transmission factor) of a thin plate at frequencies for wich the mass law is applicable.
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 absorbent (acoustic complex) to improve their acoustic performance?
Un matériau amortissant et absorbant (complexe acoustique) permet d’augmenter l’indice d’affaiblissement acoustique et l’isolement acoustique d’une plaque sur laquelle il est appliqué en cumulant en un seul produit ne nécessitant qu’une seule application les propriétés complémentaires d’ amortissement de l’ amortissant et d’ absorption de l’ absorbant.
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).
Why choose an absorbent or an acoustic complex based on polyester wool rather than any other absorbent?
Un tel choix est indiqué dans tous les cas ou il est recherché un produit justifiant d’un très bon facteur d’absorption et respectant l’environnement (car recyclable et sans défibrage) et dont l’application (dans les situations ordinaires) ne nécessite en général pas de surfacage.
Such a choice is appropriate in all cases where it is searched for a product showing a very good absorption factor and environmentally friendly (because recyclable and without grinding) and whose application (in ordinary situations) generally does not require any surfacing. Such a filling can be used for the improvement of the performance of an existing enclosure (sounproofing hood) / of an existing (acoustic) partition.