Noise and nuisance - research reports
NANR 208 - noise modelling
In 2004 Defra let a research contract to Hepworth Acoustics, DGMR and Acustinet to investigate how the quality of input data used for road traffic noise modelling could affect the reliability of the noise levels calculated. The final report is available here.
This new research project has taken the same approach and techniques, and has applied them to the assessment of noise from railways, in order to understand how the quality of input data could affect the quality of the calculated noise levels. The expertise and experience of the original project team has been augmented by the addition of Acustica and railway acoustics specialists from DeltaRail.
This research project has investigated the link between the quality of input data required to undertake assessment of railway noise impact, and the quality of the noise level results obtained across a noise map. By using a combination of technical approaches, the wide range of input data required has been investigated, and an understanding developed on how each affects the uncertainty within the resultant calculated noise level. This understanding has been translated into a number of GPG Toolkits, as quantified accuracy statements associated with each Toolkit option, and also as a series of practical recommendations for noise mapping bodies undertaking assessments for the Directive.
Final report
- Part 1: Project approach (PDF 2.0 MB - large file)
- Part 2: Error propagation testing of RMR interim (PDF 6.0 MB - large file)
- Part 3: Error propagation testing of CRN (PDF 4.0 MB - large file)
- Part 4: Quantified accuracy of GPG toolkits – RMR interim (PDF 300 KB)
- Part 5: Quantified accuracy of GPG toolkits – CRN (PDF 600 KB)
- Part 6: Data accuracy guidelines of RMR interim (PDF 600 KB)
- Part 7: Data accuracy guidelines of CRN (PDF 550 KB)
- Part 8: Executive summary (PDF 550 KB)
- One page summary (PDF 10 KB)
For further enquiries, please contact:
Ian Sherlock
Project Manager (Research)
Local Environment Protection
Defra, Nobel House
3rd Floor, Zone 3B
17 Smith Square
London
SW1P 3JR
Page last modified: 1 November 2007
Page published: 26 January 2006