BS EN 16272-3-1-2012 Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance Part 3-1: Normalized railway noise spectrum and single number ratings for di

BS 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 laborator BS 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 d CEN EN 16271-2012 Value management - Functional expression of the need and functional performance specification - Requirements for expressing and validating the need to be satisfied within the process of purchasing or obtaining a product BS 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 di BS EN 16272-4-2016 Railway applications — Track — Noise barriers and related devices acting on airborne sound propagation — Test method for determining the acoustic performance Part 4: Intrinsic characteristics — In situ values of sound diffraction under BS 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 insulatio