Noise and Vibration Report - Transnet

ENVIRO-ACOUSTIC RESEARCHSCOPING NOISE REPORT – TRANSNET: SWAZI RAIL LINK – DAVEL YARD TO NERSTON RSA ROUTEThe document uses the L Aeq,1 hr noise descriptors to define noise levels. It does not determinethe detection period, but refers to the IEC standards, which requires the fast detector settingon the Sound Level Meter during measurements for Europe.2.7 INTERNATIONAL GUIDELINES – STANDARDS FOR NOISE FROM RAILWAYSNoise reception limits exist on a national level in various forms for new and upgraded lines.Limits for existing lines are only in force in Switzerland, Denmark, Italy and will be in Swedenfrom 2015 on. Mandatory reception limits or insulation standards for new buildings alongexisting railway lines are, for example, in force in Finland, France and Switzerland.Figure 2-1: Residential Noise Limits for New and Upgraded Railway LinesThese limits are however not completely comparable, as they differ in terms of:• Indicators;• Reference times;• Receiver locations (free-field (reflection at the building not considered) or at thefaçade);• The difference in levels amounts to 3 dB(A));• Emission assumptions (levels, location);• Transmission factors (e.g. weather conditions etc);• Definition of substantial upgrading;P a g e | 15