| THE LEGISLATIVE OR REGULATORY FRAMEWORK
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| Please list all relevant laws, enactment's, standards etc. (where possible giving information about how they interrelate) |
All UK registered aircraft must comply with noise certification requirements laid down in the in the Air Navigation (Noise Certification) Order 1990 made under the Civil Aviation Act 1982, and BCAR Section N. The relevant noise certification requirements are set out in various chapters of ICAO Annex 16 (1962). EC Directive 89/629 specifies no further additions of ICAO Annex 16 Chapter 2 aircraft to the registers of Members States, EC Directive 92/14 specifies that existing ICAO Annex 16 Chapter 2 aircraft should be phased out by 2002.
The Civil Aviation Act 1982 provides immunity from civil actions related to noise, provided operations comply with the relevant Air Traffic Navigation Order. To avoid conflict with this immunity, the Environmental Protection Act 1990 specifically excludes 'noise by aircraft other than model aircraft'. The Civil Aviation Act 1982 also provides for the Secretary of State to designate airports for the purposes of regulating aircraft noise by setting limits and directions to airport managers. The Airports Act 1986 allows noise and track monitoring equipment to be specified by the Secretary of State at designated airports. |
| NOISE LIMITS (where stated)
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What noise limits are used ? Please give details of these in terms of
- how and where they are specified
- metric used
- day and night limits
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The are no aircraft noise limit values in the UK. Noise contour maps in LAeq,16hr are published annually at designated airports and are becoming commonplace at others. Various LAeq,16hr contour boundaries have been used in the past to define noise insulation schemes to update historic schemes based on the 50 NNI contour. |
| Is the assessment of noise against the limits based on measurement, prediction or both ? |
Noise contours are always generated by a method calculation. |
| DERIVATION OF NOISE LIMITS
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| Please give summary details on the basis of these noise limits e.g. on which research findings and/or practical considerations |
The changeover from NNI to LAeq,16hr in 1990 was based on the results of the 1984 Aircraft Noise Index Study (CAA DORA Report 8402 1985), which generally supported trends towards the use of LAeq based indices. NNI was originally adopted as a result of the Wilson Report of 1963, based on the results of a 1961 aircraft noise study. |
| Is further research planned or considered necessary ? |
The management of aircraft noise at night has become increasingly controversial in recent years and further research is being planned. |