Calculation of cumulative effect of noise from combined sources.

This version is based on the latest results from the Knowledge base on annoyance surveys. The results from this calculation should however be used with care: many factors can influence the acoustic situation.
Probaly the result is underestimated if the noise is coming from opposite sides of a house. More information on this multiple source method.

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Noise levels in Lden in dB Cumulative Noise value Here
Road traffic
Noise
Level		 Rail traffic
Noise
Level		 Air traffic
Noise
Level		 Industry
(without Impuls)
Level		 Impulse
Noise
Level		 Windturbine
Noise
Level		 Cumulative noise level
Fill in: measured or calculated Ldn levels in dB(A) per source ----
Lden value that would cause the same annoyance as road traffic noise: In the cell above is the level of road traffic noise that would give approximately the same annoyance as the combined exposure of the sources at the left side
Highly annoyed : Cumulative highly annoyed

Page from 9 May 2009