Sound absorbent

Details Sound absorbent Sound absorbent

E - Fixed Constructions

04

B

E04B 1/82 (2006.01) E04B 1/86 (2006.01) G10K 11/162 (2006.01) G10K 11/172 (2006.01)

Patent

CA 2602301

Sound absorbent (1) of a hard material, such as metal, glass, hard plastic or composites thereof, for absorption of acoustic waves by friction of viscous flow, essentially in the frequency range between 100 and 4000 Hz. The sound absorbent (1) comprises a panel element (3) with microslits (5) therethrough, said microslits (5) having a minimum slit width (b) of less than 0.45 mm. When in use, the panel element (3) is arranged with a distance to a rear surface.

L'invention concerne un absorbant acoustique (1) constitué d'un matériau dur, tel qu'un métal, du verre, une matière plastique dure ou des composites de ceux-ci en vue de l'absorption de signaux acoustiques par frottement de l'écoulement visqueux, essentiellement dans la plage de fréquences entre 100 et 4000 Hz. L'absorbant de son (1) comprend un élément de panneau (3) comportant, au travers de celui-ci, des micro-fentes (5), lesdites micro-fentes (5) présentant une largeur minimale de fente (b) de moins de 0,45 mm. Lorsqu'il est en service, l'élément de panneau (3) est disposé à une certaine distance d'une surface arrière.

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