- carte de type A en Lden : zones exposées à + 55dB(A) avec des courbes
isophones de 5 en 5 dB(A) : ]55;60], ]60,65], ]65,70], ]70,75], ]>75]
- Lden : indice de gêne sonore pondéré suivant les différentes périodes
d'une journée, soit :
day/jour : 6h-18h
evening/soirée : 18h-22h
night/nuit : 22h-6h
- dB(A) : unité de mesure exprimant un niveau d'intensité (décibel)
pondéré en fonction des caractéristiques physiologiques de l'oreille humaine.
Sources : cete Méd2009 + IGN bdCarto
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