Areas exposed to the noise of the municipal roads of Thouars over 24 hours (Lden) in Deux-Sèvres

The European Directive on Strategic Noise Maps requires at least the representation of global 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 in this dataset are related to Lden indicator. “Lden” is an indicator of the overall noise level during a day (day, evening and night) used to qualify the discomfort related to noise; exposure to noise. It is calculated from the indicators “Lday”, “Levening”, “Lnight”, averaged noise levels over the periods 6h-18h, 18h-22h and 22h-6h. It is more precisely the isophone curves plotted by 5 dB(A) steps from 55 dB(A). The data here concerns different routes, notably the Avenue Emile Zola in Thouars. Articles L572-1 to 11 of the Code de l' Environment laying down various provisions of; Adaptation to Community law in the field of the Environment; Environment and the texts of #x27; Applications (Decree No. 2006-361 of 24 March 2006, Decree of 4 April 2006 and Circular of 7 June 2007 on the issue of noise maps and noise prevention plans in the Environment) provide for the indicators, methods of calculation to be used and expected results. The data for this lot have been collected in accordance with these texts. __Origin__ The Lden and Ln indicators are evaluated at a height of 4 m. The calculation method shall be in accordance with NF-S-31-133 (Calculation of l’' attenuation of sound during its propagation in an outdoor environment, including weather effects). The data have been ordered by DDT 79 from offices d'studies. __Partner organisations__ DDT Deux-Sèvres __Links annexes__ * [XML metadata view](http://ogc.geo-ide.developpement-durable.gouv.fr/csw/all-dataset?REQUEST=GetRecordById&SERVICE=CSW&VERSION=2.0.2&RESULTTYPE=results&elementSetName=full&TYPENAMES=gmd:MD_Metadata&OUTPUTSCHEMA=http://www.isotc211.org/2005/gmd&ID=fr-120066022-jdd-71ce4b2d-5dec-4b9d-8797-61d02a268775) * [map of areas exposed to noise from land transport infrastructure over 24 hours in Deux-Sèvres](http://carto.geo-ide.application.developpement-durable.gouv.fr/567/BRUIT_TYPE_A_JOUR_079.map) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/f15e2f38833ed3a7d375665bcd46b2cbec35b5f8)