An acoustic attenuation panel including: a main layer made of a porous material and having two opposite faces; a coating layer arranged on one of the two faces of the main layer; an adhesive film, arranged at the interface between the main layer and the coating layer to assemble same. The main layer is a body made of melamine resin foam having a density between 6 and 6.8 kg/m3 and a porosity rate between 0.978 and 0.984; the coating layer is a fabric with a density between 484 and 526 kg/m3 and a porosity rate between 0.771 and 0.817; the adhesive film is a film made of a thermoplastic material provided with holes passing through and having a surface density between 40 g/m2 and 56 g/m2.
PANNEAU D'ATTÉNUATION ACOUSTIQUE AYANT DES PERFORMANCES AMÉLIORÉES DANS LES BASSES ET MOYENNES FRÉQUENCES
ACOUSTIC ATTENUATION PANEL WITH IMPROVED PERFORMANCE IN LOW AND MEDIUM FREQUENCIES
SCHALLDÄMMPLATTE MIT VERBESSERTER LEISTUNG BEI NIEDRIGEN UND MITTLEREN FREQUENZEN
2022-10-05
Patent
Electronic Resource
French
European Patent Office | 2020
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