# Commission Directive (EU) 2015/996 of 19 May 2015 establishing common noise assessment methods according to Directive 2002/49/EC of the European Parliament and of the Council (Text with EEA relevance), Division: Long-term sound level at point R in decibels A (dBA)

Extent: E+W+S+N.I.

The total sound level in decibels A (dBA) is obtained by summing levels in each frequency band:
L Aeq,LT = 10 × lg ∑ i 10 L tot,LT,i + AWC f,i ∕ 10
(2.5.11)
where i is the index of the frequency band. AWC is the A-weighting correction according to the international standard IEC 61672-1:2003.
This level LAeq,LT constitutes the final result, i.e. the long-term A-weighted sound pressure level at the receiver point on a specific reference time interval (e.g. day or evening, or night or a shorter time during day, evening or night).

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Source: https://www.legislation.gov.uk/eudr/2015/996/annex/division/ASSESSMENT/division/2/division/2.5/division/2.5.5/division/6 (the official version)
Page: https://openlegislation.uk/eu-directive-2015-996/annex/division-ASSESSMENT/division-2/division-2.5/division-2.5.5/division-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.