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Division 2.5.5 Calculation process

United Kingdom

Original text. Later amendments are not shown.

For a point source S of directional sound power Lw,0,dir and for a given frequency band, the equivalent continuous sound pressure level at a receiver point R in given atmospheric conditions is obtained according to the equations following below.

  1. Sound level in favourable conditions (LF) for a path (S,R)
  2. Sound level in homogeneous conditions (LH) for a path (S,R)
  3. Statistical approach inside urban areas for a path (S,R)
  4. Long-term sound level for a path (S,R)
  5. Long-term sound level at point R for all paths
  6. Long-term sound level at point R in decibels A (dBA)