1.—(1) The values of Lden, Lnight and the supplementary noise indicators must be determined by computation (at the assessment position).
(2) In this Schedule—
“assessment position” (“safle asesu”) means the assessment height in paragraph 7 of Annex IV of the Directive;
“Recommendation” (“Argymhelliad”) means Commission Recommendation 2003/613/EC of 6 August 2003 concerning the guidelines on the revised interim computation methods for industrial noise, aircraft noise, road traffic noise and railway noise, and related emissions data(1).
2. For road traffic noise indicators the assessment method “Calculation of road traffic noise” (Department of Transport, 7 June 1988, HMSO)(2) must be used, adapted using the report “Method for converting the UK road traffic noise index LA10,18h to the EU noise indices for road noise mapping” (DEFRA, 24 January 2006)(3).
3. For railway noise indicators the assessment methods “Calculation of railway noise” (Department of Transport, 13 July 1995, HMSO)(4) must be used, adapted as shown in Figure 6.5 of the report “Rail and wheel roughness – implications for noise mapping based on the Calculation of Railway Noise procedure” (DEFRA, March 2004)(5).
4. For aircraft noise indicators the assessment method “Report on Standard Method of Computing Noise Contours around Civil Airports” (Second Edition, European Civil Aviation Conference, 2-3 July 1997)(6) must be used in accordance with paragraph 2.4 of the Annex in the Recommendation.
5.—(1) For industrial noise indicators and port noise indicators the propagation assessment method described in “ISO 9613-2:1996 Acoustics – Attenuation of sound during propagation outdoors – Part 2: General method of calculation” (International Standards Organisation, 1996) must be used in accordance with paragraph 2.5 of the Annex in the Recommendation.
(2) Suitable noise emission data (input data) for “ISO 9613-2:1996 Acoustics – Attenuation of sound during propagation outdoors – Part 2: General method of calculation” can be obtained either from measurements carried out in accordance with one of the following methods:
(a)“Acoustics. Determination of sound power levels of multisource industrial plants for evaluation of sound pressure levels in the environment. Engineering method” (BS ISO 8297:1994, British Standards Institute);
(b)“Acoustics. Determination of sound power levels of noise sources using sound pressure. Engineering method in an essentially free field over a reflecting plane” (BS EN ISO 3744:1995, British Standards Institute);
(c)“Acoustics. Determination of sound power levels of noise sources using sound pressure. Survey method using an enveloping measurement surface over a reflecting plane” (BS EN ISO 3746:1996, British Standards Institute),
or by using Toolkit 10 of the “Good Practice Guide for Strategic Noise Mapping and the Production of Associated Data on Noise Exposure Version 2, Position Paper Final Draft” (European Commission Working Group Assessment of Exposure to Noise, 13 January 2006).
O.J. No. L 212, 22.8.2003, p. 49.
Prepared by TRL Limited and Casella Stanger, Document Reference st/05/91/AGG04442.
Prepared by AEA Technology plc, Document Reference: AEATR-PC&E-2003-002.
Adopted by the Twenty-First Plenary Session of ECAC, Document Reference: ECAC.CEAC Doc. 29.