Acoustic absorber, and method of manufacture thereof

Details Acoustic absorber, and method of manufacture thereof Acoustic absorber, and method of manufacture thereof

E - Fixed Constructions

04

B

181/14

E04B 1/84 (2006.01)

Patent

CA 2020777

A sound absorber has a column shape defined by a hollow, substantially cylindrical wire frame with a filler of uniformly distributed fused parallel filaments having high surface area to mass ratio, such as bloomed cellulose acetate. The sound absorber gives efficient absorption in the articulation frequency range. A method of manufacture of the sound absorber includes determining the sound response of an acoustic environment, determining the reciprocal of the sound response of that environment, and matching the absorption characteristics of the sound absorber to the reciprocal of the sound response. Each sound absorber has a linear absorption spectrum above the center frequency so that clusters of the sound absorbers exhibit a similar spectrum.

Un absorbant acoustique a une forme en colonne définie par une structure vide en treillis métallique sensiblement cylindrique et une charge uniformément répartie de filaments parallèles fusionnés ayant un rapport surface/masse élevé, comme l'acétate de cellulose traité. L'absorbant acoustique donne une absorption efficace dans la gamme des fréquences de netteté. Une méthode de fabrication de l'absorbant acoustique comprend la détermination de la réponse sonore d'un milieu acoustique, la détermination de la réciproque de la réponse sonore de ce milieu, et l'appariement des caractéristiques d'absorption de l'absorbant acoustique à la réciproque de la réponse sonore. Chaque absorbant acoustique a un spectre d'absorption linéaire au-dessus de la fréquence centrale de sorte que des grappes d'absorbants acoustiques indiquent un spectre similaire.

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