carte de type C en Ln : zones où la valeur limite de 62dB(A) est
dépassée en façade des bâtiments sensibles (habitations, établissements
d'enseignements et de santé)
- 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 Méd2009
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