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Excess Attenuation due to Dense Foliage    1/1

Strutt|Environmental Noise|Dense Foliage Excess Attenuation inserts attenuation (dB) into the active row of the worksheet.

Attenuation due to forests and dense foliage can be calculated using ISO 9613-2 or the Hoover formula (Bies and Hansen).

The Hoover formula calculates the attenuation using:

`A_f = 0.01 * r_f(m) * f_(1/3)`


The ISO 9613-2
formula calculates the attenuation using the values in Table A.1 (ISO 9613-2). The propagation distance, df, is calculated as:


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