EN 16272-3-1:2012

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Normalised railway noise spectrum
5 Single-number rating of sound absorption
  DL[alpha]
6 Single-number rating of airborne sound
  insulation DL[R]
7 Expression of results
Annex A (informative) - Guidance note on use of the
        single-number rating of sound absorption
        DL[alpha]
Annex B (informative) - Guidance note on use of the
        single-number rating of airborne sound
        insulation DL[R]

This European Standard specifies a normalised 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 that differ 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.