App Description

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:

$$ A_{div} = 10 \cdot lg ( \frac {r} {r0} ) $$

Usage example

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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