Noise in agglomerations — IED systems — Level grid LNight — mapping 2017

The data include the calculation results of the 2017 environmental noise mapping in the agglomerations in Bavaria. These are all cities in Bavaria with more than 100,000 inhabitants, i.e. Munich, Nuremberg, Augsburg, Fürth, Erlangen, Würzburg, Regensburg and Ingolstadt. In each agglomeration, noise was covered by road transport, industrial and commercial facilities in accordance with Directive 2010/75/EU of 24.11.2010 on integrated prevention and reduction of environmental protection (IED Directive) and, where available, tram and above-ground underground transport. The noise indices LDEN and LNight in dB(A) are used as a measure of general harassment or as a measure of sleep disturbance. The LDEN level is an emission level averaged over 24 hours, calculated from the levels Lday, Levening and LNight for the assessment times day (6:00-18:00), evening (18:00-22:00) and night (22:00-6:00). Due to weight factors of 5 dB(A) for the four-hour evening time and 10 dB(A) for the eight-hour night time, the increased noise sensitivity during these times is taken into account. The layer describes the noise pollution caused by industrial installations in the agglomeration, expressed by the LNight noise index in accordance with the EC Environmental Noise Directive. According to the Directive, only IED installations are taken into account.本数据集包含巴伐利亚州2017年城市群环境噪声制图的计算结果，覆盖的城市群均为巴伐利亚州常住人口超10万的城市，具体包括慕尼黑、纽伦堡、奥格斯堡、菲尔特、埃尔朗根、维尔茨堡、雷根斯堡以及因戈尔施塔特。 各城市群的噪声评价覆盖道路交通、工商设施的噪声源，相关计算依据2010年11月24日发布的《环境综合预防与削减欧盟指令（2010/75/EU）》（IED指令）执行；若存在有轨电车及地面、地下轨道交通系统，也将其纳入噪声源范畴。 本次计算采用dB(A)计权下的LDEN（昼夜等效声级）与LNight（夜间声级）作为噪声扰民程度与睡眠干扰程度的评价指标。其中LDEN为24小时等效声级，由昼间（6:00-18:00）、傍晚（18:00-22:00）与夜间（22:00-6:00）三个时段的Lday（昼间声级）、Levening（傍晚声级）以及LNight（夜间声级）计算得出。由于傍晚时段（4小时）与夜间时段（8小时）分别设置了5 dB(A)与10 dB(A)的权重修正，以此体现该时段内人体对噪声敏感度提升的特性。 本数据集的工业噪声图层涵盖城市群内工业设施产生的噪声污染信息，以符合欧盟环境噪声指令要求的LNight噪声指数进行表征；依据该指令要求，仅纳入IED指令覆盖的工业设施。