Multiple Noise Sources Calculator - Point Source Model

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Source 1

or   dB
Location A B
m m
dB dB
dB dB

Source 2

or   dB
C D
m m
dB dB
dB dB

Source 3

or   dB
Location E F
m m
dB dB
dB dB

Universal Settings

1 = whole (e.g. above soft ground)

2 = half (e.g. above hard ground)

4 = quarter (e.g. above hard ground on a wall)

8 = eighth space (e.g. in the corner of a room)

dB
dB

Combining Sources

Sources Location On time Leq
% dB
% dB
% dB
Total Leq dB

Notes

The calculations are for the point source model of sound propagation (6dB per doubling of distance). For sources of significant size, sound pressure levels must be input at source-to-receiver distances large enough to be sufficiently in the far-field, where inherent directivity is minimal. For a broadband source, this is where the distance is greater than the longest dimension of the source.

The calculations are based on free-field conditions, where there is no reverberant field.

For more in-depth help click here.

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