Noise level Lden of rail routes in France - 2017 report
Description
This dataset locates the sectors exposed to noise levels from major railways according to the Lden index for 2017 in France.The Lden index is one of the two indicators recommended by the European Directive 2002/49/EC, relating to the assessment and management of environmental noise, in order to measure the noise level describing environmental noise. Within the meaning of the Directive, the latter is emitted by means of transport, road, rail or air traffic or comes from sites of industrial activity. The Lden index stands for ‘Level Day - Evening - Night’. It is therefore an indicator of the overall noise level for 24 hours (day, night and night) used to describe the discomfort associated with exposure to noise. It is calculated from the indicators "Lday", "Levening", "Lnight", averaged sound levels over the periods 7h-19h, 19h-23h and 23h-7h. It is expressed in decibel A (dB(A)), which is the unit chosen to represent the sensitivities of the human ear. In the Lden calculation, the ‘Levening’ and ‘Lnight’ indicators are weighted to take account of the fact that, at the same level, we are more sensitive to noise during these periods: - +5 dBA in the evening period, which means that a vehicle travelling in the evening is considered equivalent to almost three vehicles travelling during the day; - +10 dBA at night, which means that a vehicle travelling in the evening is considered equivalent to almost ten vehicles travelling during the day. The indicator is averaged over a calendar year. https://data.georisques.fr/id/dataset/6b880348-e0b9-4056-814b-e72dee431936
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