Acoustical barrier with decoupler

Details Acoustical barrier with decoupler Acoustical barrier with decoupler

B - Operations, Transporting

60

R

B60R 13/08 (2006.01) G10K 11/16 (2006.01) G10K 11/168 (2006.01)

Patent

CA 2276041

An acoustical barrier (10) for blocking the transfer of sound through a barrier wall (12). The acoustical barrier comprises a sound absorbing layer (22) and a decoupling layer (20) mounted to the sound absorbing layer (22) and spacing the sound absorbing layer from the barrier wall (12). The decoupling layer has a construction defining multiple voids (26) to reduce the quantity of material used to construct the decoupling layer and to reduce the surface area of the decoupling layer contracting the barrier wall (12). Preferably, the decoupling layer (20) has multiple protrusions such as ribs (28) between which are interstitial spaces defining the voids (26).

L'invention concerne un élément antibruit (10) pouvant bloquer la transmission acoustique à travers une paroi isolante (12). L'élément antibruit comprend une couche phono-absorbante (22) et une couche de découplage (20) fixée à la couche phono-absorbante (22) et séparant cette dernière de la paroi isolante (12). La couche de découplage présente une configuration qui définit de multiples cavités (26) pour réduire, d'une part, la quantité de matériau nécessaire pour sa fabrication et, d'autre part, l'aire de surface de la couche de découplage qui vient au contact de la paroi isolante (12). De préférence, la couche de découplage (20) comporte de multiples parties saillantes, telles que des nervures (28), entre lesquelles se trouvent des espaces interstitiels délimitant les cavités (26).

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