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Rating environmental noise on the basis of noise maps within the framework of the Environmental Noise Directive

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Author: Miedema, H.M.E. · Borst, H.C.
Institution: TNO Bouw
Source:Internoise 2007 - Noise and Sustainability, Istanbul, Turkey, August 28-31, 2007, 4044-4053
Identifier: 470279
Keywords: Acoustics and Audiology · Ambient noise · Combined noise · Environmental noise · Exposure-response relationships · Hot spot · Limit values · Neighbourhood · Noise climates · Noise map · Present situation · Quiet sides · Rating system · Residential areas · Road traffic · Stepwise procedure · Exhibitions · Noise pollution · Housing · Urban Development · Built Environment


In order to evaluate the need for noise measures as well as the improvement that can be obtained with different measures, there is a need for a system that rates environmental noise on the basis of noise maps. Based on empirical exposure-response relationships, a rating system and a stepwise procedure for its implementation have been developed. It gives insight in the environmental noise impact on the basis of Lden or Lnight, but additionally can take into account the influence of sound insulation, quiet side of a dwelling, and ambient noise in the neighbourhood. It gives ratings for: • Overall noise climate in residential areas: percentage highly annoyed (%HA); • Night-time noise climate in residential areas: percentage highly sleep disturbed (%HSD); • Hot spots in residential areas: (weighted) number of individuals above limit value L (nL); • Non-Quiet area: percentage area with Lden > 50 dB(A) (AREA50). The indicators can be calculated for a city or parts of it (neighbourhoods), for different types of sources (aircraft, road traffic, railways) separately or for the combined noise from these sources, and for the present situation as well as future situations based on scenarios