04 74 09 93 20 
info@creacoustic.fr 
82 Rue Henri Depagneux 69400 Limas
Indicateur global d’affaiblissement acoustique pondéré A, calculé à partir d’un spectre de bruit rose. Il permet d’évaluer la performance d’une paroi face à un bruit équilibré sur toutes les fréquences.
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