Small Deviations Procedure: A New Way to Introduce Flexibility in the Conformity Assessment of Reference Tracks for Pass-by Acoustic Tests
When measuring the noise emitted by a train passing at constant speed, a significant contribution may come from the track. Hence, the accurate assessment of the noise emission of railway vehicles requires a tight control of the track acoustic parameters. The concept of reference track was developed to meet this requirement. However, the need to carry out measurements on tracks which strictly comply with the limits of track decay rates and rail acoustic roughness may lead to undue stringent requirements: small deviations from these limits may not have a significant effect on the measured noise value. The purpose of this paper is to propose a method which introduces some flexibility in the assessment of conformity of track sections with regard to these specifications.
KeywordsHigh Speed Train Railway Vehicle Noise Emission Reference Track Track Section
Unable to display preview. Download preview PDF.
- 1.EN15610, Railway applications – Noise emission – Rail roughness measurement related to rolling noise generation (2009)Google Scholar
- 2.EN15461, Railway applications – Noise emission – Characterization of the dynamic properties of track sections for pass by noise measurements (2008)Google Scholar
- 3.Commission decision 2006/66/EC of December 23, 2005 concerning the technical specification for interoperability relating to the subsystem ‘rolling stock — noise’ of the trans-European conventional rail system. Official Journal of the European Union L37 (49) (2005) Google Scholar
- 4.ENISO3095, Railway applications – Acoustics – Measurement of noise emitted by railbound vehicles (2005)Google Scholar
- 5.ENISO3381, Railway applications – Acoustics – Measurement of noise inside railbound vehicles (2005)Google Scholar
- 6.SNCF test report, UIC project ERS, Noise emitted in the environment during the pass-bys of wagons equipped with composite blocks (LL type), n°AEF-D R 04048 / 04 D-054 (2004) (in French)Google Scholar