- carte de type A en Ln : zones exposées à + 50dB(A) avec des courbes isophones
de 5 en 5 dB(A) : ]50;55], ]55,60], ]60,65], ]65,70], ]>70]
- Ln : indice de gêne sonore pondéré pour la période de nuit soit (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 Méd2010
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