TY - GEN
T1 - ASSESSMENT OF THE REDUCTION OF RAILWAY NOISE ACHIEVED BY THE INSTALLATION OF A LOW-NOISE BARRIER
AU - Vázquez Suarez, Manuel
AU - Sanz Pozo, Roberto
AU - Aspuru Soloaga, Itziar
AU - Mentrida, Javier
N1 - Publisher Copyright:
© 2023 First author et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
PY - 2023
Y1 - 2023
N2 - The objective of the paper is to present a procedure to calculate the effect of a low-noise barrier in the assessment of solutions to abate railway noise. The benefits are quantified both on the exposed area and on the affected population. The calculation can consider the effect of low-noise barriers on one or both sides of the railway line. The low-noise barrier, in addition to shield the acoustic sources referred to the rail and wheel interaction, located at the low height positions, modifies the acoustic field in the area between the coach and the barrier position. This effect is not well represented by the attenuation factor considered on the propagation formulae that defines the acoustic diffraction, Adiff. This factor only depends on the height of the barrier and the barrier-source and barrier-receiver distance. Therefore, the results of acoustic calculation methods, including CNOSSOS-EU, minimize the effect of a railway low-noise barrier. Based on a project requested by ACUSTRAIN, the document developed by Tecnalia defines how this effect could be simulated based on the formulations of the CNOSSOS-EU method and the capabilities of existing acoustic programs.
AB - The objective of the paper is to present a procedure to calculate the effect of a low-noise barrier in the assessment of solutions to abate railway noise. The benefits are quantified both on the exposed area and on the affected population. The calculation can consider the effect of low-noise barriers on one or both sides of the railway line. The low-noise barrier, in addition to shield the acoustic sources referred to the rail and wheel interaction, located at the low height positions, modifies the acoustic field in the area between the coach and the barrier position. This effect is not well represented by the attenuation factor considered on the propagation formulae that defines the acoustic diffraction, Adiff. This factor only depends on the height of the barrier and the barrier-source and barrier-receiver distance. Therefore, the results of acoustic calculation methods, including CNOSSOS-EU, minimize the effect of a railway low-noise barrier. Based on a project requested by ACUSTRAIN, the document developed by Tecnalia defines how this effect could be simulated based on the formulations of the CNOSSOS-EU method and the capabilities of existing acoustic programs.
KW - acoustic software
KW - directivity
KW - low noise barriers
KW - noise assessment
UR - https://www.scopus.com/pages/publications/85191246878
M3 - Conference contribution
AN - SCOPUS:85191246878
T3 - Proceedings of Forum Acusticum
BT - Forum Acusticum 2023 - 10th Convention of the European Acoustics Association, EAA 2023
PB - European Acoustics Association, EAA
T2 - 10th Convention of the European Acoustics Association, EAA 2023
Y2 - 11 September 2023 through 15 September 2023
ER -