EIA calculation: online calculation of infinite long-line sound source geometric divergence attenuation of line source
The basic formula for the geometric divergence attenuation of an infinite long line source is:
$$ Lp(r) = Lp(r0) - 10 \cdot lg ( \frac {r} {r0} ) $$
The second term in the formula represents the geometric divergence attenuation of an infinitely long line source:
$$ A_{div} = 10 \cdot lg ( \frac {r} {r0} ) $$
Input data:
R0—reference point distance sound source distance: 15
R—predicted point to source distance: 10
Lr0—r0 point sound level: 4
Click "Calculate" to output data
Geometric divergence attenuation of infinite long line sources: - 4.054
Sound level of the forecast point: 8.054
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