Conversion formulas for environmental noise metrics

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Scope

What are the appropriate formulas for converting various environmental noise metrics (e.g. L_DEN, L_night, L_Aeq,22-07, L_Aeq,07-22, L_Aeq,24h) into each other?

The formulas should take into account

a) the use of different time bases (e.g. 24 h for L_Aeq,24h, 8 h for L_night)

b) the use of weights for different times of day

c) different calculation heights (e.g. 4 m for Lden)

d) the typical activity profile of the noise source in question (e.g. relative traffic densities of day, evening, and night).

Definition

Data

Description of the data used for obtaining the value of the variable
(e.g. measurement data; mathematical method and its parameters). 

Please include references (preferably using the <ref> </ref> tags)
and links to original data, as appropriate.

Dependencies

List of upstream variables.
The variables can be listed used descriptive (free-format) names or unambiguous identifiers
(e.g. Analytica IDs).

Unit

Unit in which the result is expressed.

Formula

Algebra or other explicit methods if possible
(e.g. Analytica code between the <anacode> </anacode> tags).

Result

If possible, a numerical expression or distribution.

See also

Links to relevant information that does not belong to Definition.

References

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Related files

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Conversion formulas for environmental noise metrics. Opasnet . [1]. Accessed 19 May 2024.