Soundproofing panels with beads and process for producing...

B - Operations – Transporting – 32 – B

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B32B 3/12 (2006.01) B32B 3/20 (2006.01) B64D 29/00 (2006.01) G10K 11/165 (2006.01)

Patent

CA 2485322

A soundproofing panel (2) comprises a core (4) sandwiched between a solid wall (6) and a porous wall (8), the core being connected to the walls and comprising partitions (12) extending in the thickness direction between the two walls so as to form cells (10) each cell containing at least one sound energy dissipating layer (14), the dissipating layers (14) being constituted by hollow spherical beads (20) having mutually contacting walls that are porous and micro-perforated, and being held in position in the thickness direction between the two walls (6, 8) by nets (22) that are secured to the partitions.

Panneau insonorisant (2) comportant une âme (4) prise en sandwich entre une paroi pleine (6) et une paroi poreuse (8), l'âme étant liée aux parois et comportant des cloisons (12) s'étendant dans le sens de l'épaisseur entre les deux parois et formant des cellules (10) qui comprennent chacune au moins une couche dissipatrice d'énergie sonore (14), les couches dissipatrices (14) étant constituées par des billes (20) sphériques creuses, à parois poreuses et micro-perforées en contact mutuel et étant maintenues en position dans le sens de l'épaisseur entre les deux parois (6, 8) par des filets (22) fixés sur les cloisons.

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