Sparsity-driven separation of railway rolling noise with a microphone array

Elias Zea*, Efren Fernandez Grande, Ines Lopez Arteaga

*Corresponding author for this work

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Abstract

In this paper we propose the use of sparse reconstruction methods to characterize the pass-by noise of rail-bound transportation vehicles. European trains are homologated with the TSI-NOISE legislation, which specifies the quantification of the vehicle noise alone; that is, irrespective of the track on which the vehicle is running. However, some tracks contribute significantly to the pass-by noise in mid-frequencies, leading to geographically dependent noise emissions of the same vehicle. To remove this dependency from the homologation, the track and vehicle contributions must be separated. This paper proposes the use of sparse reconstruction methods to distinguish between vehicle and rail noise. The approach is based on measurements with a microphone array near the track, and the use of dictionaries of plane waves and moving equivalent sources, to model the track and the vehicle contributions respectively. It is shown that the separated spectra agree well with the reference results predicted with the TWINS software.

Original languageEnglish
Publication date2020
Number of pages2
Publication statusPublished - 2020
EventForum Acusticum 2020 - Virtual event
Duration: 7 Dec 202011 Dec 2020
https://fa2020.universite-lyon.fr/

Conference

ConferenceForum Acusticum 2020
LocationVirtual event
Period07/12/202011/12/2020
Internet address

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