Simple download service (Atom) of the dataset: Areas exposed to noise from the departmental road 648 west of Niort over 24 hours (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 in this data set are related to the Lden indicator. “Lden" is an indicator of the overall noise level during a day (day, evening and night) used to qualify the discomfort associated with exposure to noise. It is calculated from the indicators "Lday", "Levening", "Lnight", "average noise levels over the periods 6h-18h, 18h-22h and 22h-6h. These are more precisely the isophone curves drawn in steps of 5 dB(A) from 55 dB(A) over a whole day. The data here concerns the Avenue de Nantes to the west of Niort. 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 results I'm waiting for you. The data for this lot have been collected in accordance with these texts.《欧盟战略噪声地图指令》（European Directive on Strategic Noise Maps）要求至少以各噪声源为单位，呈现整体噪声指标Lden和Ln，上述指标对应建筑立面的入射噪声，以A计权分贝（dB(A)）为单位，反映整体不适或健康风险的概念。 本数据集的数据与Lden指标相关。Lden是用于量化噪声暴露相关不适的日间（含昼、傍晚、夜间）整体噪声水平指标，其计算基于Lday、Levening、Lnight三个时段的平均噪声水平——分别对应6时-18时、18时-22时及22时-6时的时段。 此处具体呈现的是以5 dB(A)为步长、从55 dB(A)起绘制的全日等响曲线（isophone curves）。 本数据集的数据涉及法国尼奥尔特（Niort）西侧的南特大道（Avenue de Nantes）。 《法国环境法典》第L572-1条至第L572-11条，以及为适配欧盟环境领域法律而制定的实施法规（2006年3月24日第2006-361号政令、2006年4月4日政令及2007年6月7日关于编制噪声地图与环境噪声防治规划的通告），对上述噪声指标、所需计算方法及结果输出作出了明确规定。在此告知：本批次数据即依据上述法规采集编制。