Sandwich acoustic panel

Details Sandwich acoustic panel Sandwich acoustic panel

G - Physics

10

K

G10K 11/168 (2006.01) B64C 1/40 (2006.01) E04B 1/86 (2006.01) G10K 11/172 (2006.01)

Patent

CA 2364347

An acoustic panel with several degrees of freedom comprises a resistive layer (14), a compartmentalized structure (16) formed from at least two superposed compartmentalized layers (18) and a back reflector (17), starting from an outside face facing an incident acoustic wave. A porous separator (24) is placed between each pair of adjacent compartmentalized layers. On each of its faces, this separator is fitted with tubular guides (26) that penetrate into at least some of the cells (20) of the compartmentalized layers. This thus aligns the cells over the entire thickness of the compartmentalized structure (24), regardless of the shape of the panel.

Un panneau insonorisant avec plusieurs degrés de liberté comporte une couche résistive (14), une structure compartimentée (16) constituée d'au moins deux couches compartimentées superposées (18) et un rétroréflecteur (17), en partant de la paroi externe qui fait face à une onde sonore incidente. Un séparateur poreux (24) est placé entre chaque paire de couches compartimentées adjacentes. Sur chacune de ses faces, le séparateur est équipé de guides tubulaires (26) qui pénètrent au moins dans certaines cellules (20) des couches compartimentées. Ceci a pour effet d'aligner les cellules sur toute l'épaisseur de la structure compartimentée (24), quelle que soit la forme du panneau.

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