EN 16272-3-2:2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Normalized railway noise spectrum
5 Single-number rating of sound reflection
  index DL[RI]
6 Single-number ratings of sound insulation
  index DL[SI]
7 Single-number ratings of sound diffraction
  index difference DL[deltaDI]
8 Expression of results
Annex A (informative) - Guidance note on use of the
        single-number rating of sound
        reflection index DL[RI]
Annex B (informative) - Guidance note on use of the
        single-number rating of airborne
        sound insulation index DL[SI]
Annex C (informative) - Guidance note on use of the
        single-number rating of sound diffraction
        index difference DL[deltaDI]

This European Standard specifies a normalized railway noise spectrum for the evaluation and assessment of the acoustic performance of devices designed to reduce airborne railway noise near railways.All noise reducing devices different from noise barriers and related devices acting on airborne sound propagation, e.g. devices for attenuation of ground borne vibration and on board devices, are out of the scope of this European Standard.