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Strutt|Environmental Noise|CONCAWE Source Height Correction inserts attenuation into the active row of the worksheet.

The source height correction, K₅ is calculated using ground attenuation (K₃), meteorological attenuation (K₄), source height (h_s), receiver height (h_r) and propagation distance (d), where:

For `(K_3 + K_4) > 3 dB`,

`K_5 = (K_3 + K_4 + 3)(gamma - 1) dB`

`gamma` is obtained from the Figure 9 (see reference) as a function of the grazing angle `psi`, where:

`psi = tan^-1((h_s + h_r)/d)`

`h_s` and `h_r` are the source and receiver heights respectively.

`K_5 = 0`, for `(K_3 + K_4) < -3 dB`

References:

• Manning, C.J., The propagation of noise from petroleum and petrochemical complexes to neighbouring communities, p.27