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Night noise contours: a feasibility study.

Porter, N D (1997) Night noise contours: a feasibility study. NPL Report. CMAM 4

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Abstract

This report describes a study of the feasibility of producing night noise contours to depict levels of night-time annoyance around airports. The work was commissioned by the National Air Traffic Services Ltd (NATS Ltd) for the UK Department of Environment, Transport and the Regions (DETR). The report is broken down into five main elements: an examination of the causes of an annoyance response, an investigation of models for predicting night-time annoyance, a review of existing dose-response relationships used to assess effects, an examination of the applicability of existing night-time weights and their adoption in the existing procedures in the USA.
Correlations are found between annoyance reactions and noise exposure levels. There is some agreement on dose-response relationships for the day-time or 24-hour period but evidence for robust and consistent data for night-time remains unconvincing. There also appears to be a lack of evidence on the significance of the contribution of individual effects, such as sleep disturbance and communication interference, to the total annoyance response. Selection of the most appropriate metric is not simple, but should be determined by the need to measure noise dose in such a way as to help define the extent of an effect.
A four stage ideal model for predicting annoyance at different times of day is summarised. This reveals gaps in knowledge which need to be resolved before we can apply it to predicting noise annoyance contours. The work concludes that we cannot, at present, produce night contours that depict levels of night-time annoyance. In order to develop a useful and pragmatic tool on which to base regulatory controls, recommendations are made for consideration by the DETR when prioritising their next actions.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CMAM 4
Subjects: Acoustics
Acoustics > Sound in Air
Last Modified: 02 Feb 2018 13:18
URI: http://eprintspublications.npl.co.uk/id/eprint/819

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