Division: Vertical edge scenarios - 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)

Equation (2.5.21) may be used to calculate the diffractions on vertical edges (lateral diffractions) in case of industrial noise. If this is the case, A_dif = Δ _dif(S,R) is taken and the term A_ground is kept. In addition, A_atm and A_ground shall be calculated from the total length of the propagation path. A_div is still calculated from the direct distance d. Equations (2.5.8) and (2.5.6) respectively become:

$A_{H} = A_{div} + A_{path}^{atm} + A_{path}^{ground,H} + Δ_{dif,H (S,R)}$	(2.5.33)
$A_{F} = A_{div} + A_{path}^{atm} + A_{path}^{ground,F} + Δ_{dif,H (S,R)}$	(2.5.34)

Δ _dif is indeed used in homogeneous conditions in equation (2.5.34).

Division Vertical edge scenarios