Simple download service (Atom) of the data package: Areas exposed to noise from 24-hour ground transport infrastructure (Lden) in Deux-Sèvres

The European Directive on Strategic Noise Maps requires as a minimum the representation of the overall noise indicators Lden and Ln, for each source. These indicators correspond to the incident noise on the facades. The indicators represented are expressed in dB(A) and reflect a notion of overall discomfort or health risk. The data for this lot relates to the Ln indicator (for Lnight). These are the isophone curves drawn in steps of 5 dB(A) from 50 dB(A) at night from 22:00 to 6am.They enable the realisation of the so-called strategic maps of exposure to type A noise. The Ln indicator can be associated with the risk of sleep disturbances. Articles L572-1 to 11 of the Environmental Code laying down various provisions for adaptation to Community law in the field of the environment and the implementing texts (Decree No 2006-361 of 24 March 2006, decree of 4 April 2006 and circular of 7 June 2007 on the drawing up of noise maps and plans for the prevention of environmental noise) provide for the indicators, the calculation methods to be used and the expected results. The data for this lot have been collected in accordance with these texts.