# Regulation (EU) No 540/2014 of the European Parliament and of the Council of 16 April 2014 on the sound level of motor vehicles and of replacement silencing systems, and amending Directive 2007/46/EC and repealing Directive 70/157/EEC (Text with EEA relevance), Division 6.2: Calculation of Lurban ASEP

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

From any Lwot ASEP as measured in accordance with this Annex, Lurban ASEP shall be calculated as follows:
(a)calculate awot test ASEP as specified in point 4.1.2.1.2.1 or point 4.1.2.1.2.2 of Annex II, as applicable;
(b)determine the vehicle speed (VBB ASEP) at BB' during the Lwot ASEP test;
(c)calculate kP ASEP as follows:
kP ASEP = 1 – (aurban/awot test ASEP)
Test results where awot test ASEP are less than aurban shall be disregarded.
(d)calculate Lurban measured ASEP as follows:
Lurban measured ASEP =
Lwot ASEP – kP ASEP * (Lwot ASEP – Lcrs)
For further calculation, use the Lurban from Annex II without rounding, including the digit after the decimal (xx.x).
(e)calculate Lurban normalized as follows:
Lurban normalized = Lurban measured ASEP – Lurban
(f)calculate Lurban ASEP as follows:
Lurban ASEP =
Lurban normalized – (0,15 * (VBB ASEP – 50))
(g)compliance with sound level limits:
Lurban ASEP shall be less than or equal to 3,0 dB.

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Source: https://www.legislation.gov.uk/eur/2014/540/annex/VII/division/6/division/6.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2014-540/annex-VII/division-6/division-6.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.