ONR CEN/TR 15874

For the method of pass-by noise measurement, the current High Speed Rolling Stock TSI (2008) refers to EN ISO 3095: 2005 [8]. The current Conventional Rail TSI refers to ISO 3095:2001. Having said this, there is not a significant difference between the two versions. The EN ISO 3095 standard itself already sets a limit spectrum for the track on which acceptance tests are made and prescribes a method for its measurement. The limit spectrum set in EN ISO 3095 is not used in the TSI’s, rather a tighter limit is set from within the TSI’s according to what was found possible by the associated NOEMIE project [7]. The project also found, for high speed trains (above 200 km/h), that a minimum wavelength range up to 0,25 m is required.