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Directive 2002/49/EC of the European Parliament and of the Council of 25 June 2002 relating to the assessment and management of environmental noise - Declaration by the Commission in the Conciliation Committee on the Directive relating to the assessment and management of environmental noise · European Union

Definition of the night-time noise indicator The night-time noise indicator Lnight is the A-weighted long-term average sound level as defined in ISO 1996-2: 1987, determined over all the night periods of a year; in which: the night is eight hours as defined in paragraph 1, a year is a relevant year as regards the emission of sound and an average year as regards the meteorological circumstances, as defined in paragraph 1, the incident sound is considered, as laid down in paragraph 1, the assessment point is the same as for Lden.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-04 · Text as adopted (Official Journal); later amendments are not incorporated in this text.