# 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 4.1.3: Interpretation of results

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

The maximum A-weighted sound pressure level indicated during each passage of the vehicle between the two lines AA' and BB' shall be noted. If a noise peak obviously out of character with the general sound pressure level is observed, the measurement shall be discarded. At least four measurements for each test condition shall be made on each side of the vehicle and for each gear ratio. Left and right side may be measured simultaneously or sequentially. The first four valid consecutive measurement results, within 2 dB(A), allowing for the deletion of non valid results (see point 3.1), shall be used for the calculation of the final result for the given side of the vehicle. The results of each side shall be averaged separately. The intermediate result is the higher value of the two averages mathematically rounded to the first decimal place.
The speed measurements at AA', BB', and PP' shall be noted and used in calculations to the first significant digit after the decimal place.
The calculated acceleration awot test shall be noted to the second digit after the decimal place.

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Source: https://www.legislation.gov.uk/eur/2014/540/annex/II/division/4/division/4.1/division/4.1.3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2014-540/annex-II/division-4/division-4.1/division-4.1.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.