Division: Long-term sound level for a path (S,R) - Commission Directive (EU) 2015/996 of 19 May 2015 establishing common noise assessment methods according to Directive 2002/49/EC of the European Parliament and of the Council (Text with EEA relevance)

The ‘long-term’ sound level along a path starting from a given point source is obtained from the logarithmic sum of the weighted sound energy in homogeneous conditions and the sound energy in favourable conditions.

These sound levels are weighted by the mean occurrence p of favourable conditions in the direction of the path (S,R):

L_{LT} = 10 \times \lg (p \times 10^{\frac{L_{F}}{10}} + (1 - p) \times 10^{\frac{L_{H}}{10}})

(2.5.9)

Division Long-term sound level for a path (S,R)