Source Noise Control to Mitigate Airborne Noise at High Rise Developments - Epping to Chatswood Rail Link
نویسنده
چکیده
The Epping to Chatswood Rail Link (ECRL) commenced operating in 2009. At the Chatswood end of the project, the railway corridor contains two existing tracks (with conventional ballast and sleeper design) and two new concrete slab tracks, the design of which incorporates sections of low stiffness rail fasteners and floating slab track. During commissioning, noise measurements were undertaken at the upper floors of two high rise buildings which overlook the railway corridor. Noise from the new ECRL tracks was found to include prominent tones which added to the subjective loudness of train passbys and were approximately 5 dBA higher than the existing tracks. The noise controls incorporated into the final mitigation package included additional rail grinding and the installation of rail dampers and acoustic panels. Computer noise modelling and a simplified cost-benefit analysis approach were adopted to optimise the mitigation measures. This paper discusses the noise benefits associated with each mitigation measure and provides a comparison between the predicted and measured noise level reductions.
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