Experimental study of noise mitigation measures on a slab track

Slab track is generally noisier than conventional ballasted track, so noise control measures that can be applied to a slab are of great importance. Several treatments have been studied under controlled conditions through experiments on 1:5 scale model with and without the presence train body. These consist absorptive rubber mats surface low barrier introduced close track. The reduction evaluated experimentally by using reciprocal method compared results numerical simulations. insertion loss spectra these combined predicted pass-by determine potential overall reductions. It has found treatment alone only small effect radiated from This increased body leading up 2–3 dB at standard receiver height 1.2 m, which suggests layer controls reflections between car All considered greater lateral vibration rail vertical vibration. Their effectiveness mostly increases, roughly 0.5 1.5 dB, as speed 80 300 km/h. As expected, more effective lower positions higher ones but its reduced 1–2 However, in combination treatment, increases when present. shows importance including evaluating effects acoustic