{
  "url": "https://openlegislation.uk/lawnmowers-harmonization-of-noise-emission-standards-regulations-1992/schedule-3/part-2/paragraph-3.2",
  "json_url": "https://openlegislation.uk/lawnmowers-harmonization-of-noise-emission-standards-regulations-1992/schedule-3/part-2/paragraph-3.2.json",
  "legislation": "uksi/1992/168",
  "legislation_title": "The Lawnmowers (Harmonization of Noise Emission Standards) Regulations 1992",
  "legislation_url": "https://openlegislation.uk/lawnmowers-harmonization-of-noise-emission-standards-regulations-1992",
  "path": "schedule/3/part/2/paragraph/3.2",
  "kind": "paragraph",
  "number": "3.2",
  "heading": "Equivalent continuous sound pressure level LAeq:(t1, t2)",
  "text": "The equivalent continuous sound pressure level LAeq:(t1, t2) is obtained by applying the A-weighting as defined in IEC publication 651, first edition, 1979 to the equivalent continuous sound pressure level Leq:(t1, t2) defined below. This weighting is obtained inter alia by using the A-weighting filter in the measuring system.\nThe equivalent continuous sound pressure level for a limited period between intervals t1 and t2, Leq:(t1, t2), expressed in decibels, of a noise at a given point is defined by:\nwhere:\np(t) is the instantaneous value of the sound pressure at this point, expressed in Pa;\np0 is the reference sound pressure, equivalent to 20 μPa;\nLp(t) is the sound pressure level at a given time at that point, expressed in dB;\nt1 and t2 are the points indicating respectively the beginning and end of the reference period determining the Leq\nt1 − t2 is the measurement interval.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1992/168/schedule/3/part/2/paragraph/3.2",
    "retrieved_at": "2026-10-29T14:30:19.442341+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."
}