04 74 09 93 20 
info@creacoustic.fr 
82 Rue Henri Depagneux 69400 Limas
Indicateurs permettant de décrire la variabilité d’un bruit dans le temps : L1 : Niveau dépassé pendant 1 % du temps de mesure (bruit de crête maximal). L10 : Niveau dépassé pendant 10 % du temps. L90 : Niveau résiduel ou « bruit de fond » (dépassé pendant 90 % du temps).
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