{
  "url": "https://openlegislation.uk/eu-regulation-2014-540/annex-II/division-2/division-2.1",
  "json_url": "https://openlegislation.uk/eu-regulation-2014-540/annex-II/division-2/division-2.1.json",
  "legislation": "eur/2014/540",
  "legislation_title": "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)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2014-540",
  "path": "annex/II/division/2/division/2.1",
  "kind": "division",
  "number": "2.1",
  "heading": "Acoustic measurements",
  "text": "The apparatus used for measuring the sound level shall be a precision sound-level meter or equivalent measurement system meeting the requirements of class 1 instruments (inclusive of the recommended windscreen, if used). Those requirements are described in ‘IEC 61672-1:2002: Precision sound level meters’, second edition, of the International Electrotechnical Commission (IEC).\nMeasurements shall be carried out using the ‘fast’ response of the acoustic measurement instrument and the ‘A’ weighting curve also described in ‘IEC 61672-1:2002’. When using a system that includes a periodic monitoring of the A-weighted sound pressure level, a reading shall be made at a time interval not greater than 30 ms (milliseconds).\nThe instruments shall be maintained and calibrated in accordance with the instructions of the instrument manufacturer.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2014/540/annex/II/division/2/division/2.1",
    "retrieved_at": "2026-11-01T14:47:38.922483+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}