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CEN/TS 16272-7:2015

Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 7: Extrinsic characteristics - In situ values of insertion loss

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Kehtiv alates 04.11.2015
Alusdokumendid
CEN/TS 16272-7:2015
Tegevusala (ICS grupid)
93.100 Raudtee-ehitus
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puuduvad
Standardi ajalugu
Staatus
Kuupäev
Tüüp
Nimetus
04.11.2015
Põhitekst
This Technical Specification specifies methods for the determination of insertion loss of outdoor noise barriers intended to shield railway noise. It specifies detailed procedures for in situ measurement of barrier insertion loss including microphone positions, source conditions and acoustic environments of the measurement sites. This Technical Specification allows one to measure the insertion loss of a given noise barrier at a given site including given meteorological conditions. It does not make it possible to compare insertion loss values of an equivalent barrier at a different site. It can be used for comparing insertion loss values of different types of barriers at the same site under given meteorological conditions by the "direct method". This Technical Specification gives a method for determining insertion loss: a) from the level difference before and after the installation of noise barriers (the "direct method") and when this is not possible because a barrier has already been installed; b) using an indirect method to estimate the sound pressure levels before installation of the barrier by measurement at another site which has been judged to be equivalent. For equivalent sites, a close match is required in source characteristics, microphone locations, terrain profiles ground surface characteristics, surrounding artificial structures and meteorological conditions. This Technical Specification prescribes principles for ensuring that sufficiently equivalent conditions are maintained between "before" and "after" cases to permit certain, reliable and repeatable determination of barrier insertion loss. This Technical Specification does not cover the determination of the intrinsic acoustic characteristics of the barrier, for example the sound insulation index and the sound absorption coefficient. The equivalent continuous A-weighted sound pressure level and one-third-octave band sound pressure level are used as noise descriptors. This Technical Specification can be used for routine determination of barrier performance or for engineering or diagnostic evaluation. It can be used in situations where the barrier is to be installed or has already been installed.
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EVS-EN 16272-3-2:2014

Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 3-2: Normalized railway noise spectrum and single number ratings for direct field applications
Uusim versioon Kehtiv alates 04.08.2014
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EVS-EN 16272-6:2014

Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 6: Intrinsic characteristics - In situ values of airborne sound insulation under direct sound field conditions
Uusim versioon Kehtiv alates 09.12.2014
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EVS-EN 16272-1:2012

Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 1: Intrinsic characteristics - Sound absorption in the laboratory under diffuse sound field conditions
Uusim versioon Kehtiv alates 05.12.2012
Põhitekst

EVS-EN 16272-2:2012

Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 2: Intrinsic characteristics - Airborne sound insulation in the laboratory under diffuse sound field conditions
Uusim versioon Kehtiv alates 05.12.2012