Managing the Uncertainty of Long-distance Sound Propagation from a Large Industrial Noise Source
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Author(s)
Procter, TG
Tomerini, Deanna
Brown, Alan
Griffith University Author(s)
Year published
2019
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The attenuation of a sound signal over long distances is accounted for by atmospheric absorption, atmospheric stability, ground effects, barriers and spherical spreading. Conversely, the propagation of sound over long distances can be enhanced by source to receiver gradient winds and vertical temperature profiles that create downward refraction of the sound waves. While the nature of each of these phenomena is well understood, the prediction of the sound propagation over long distances from a large industrial source such as an open-cut mine is inconsistent with the measured sound pressure level attributed to the source. The ...
View more >The attenuation of a sound signal over long distances is accounted for by atmospheric absorption, atmospheric stability, ground effects, barriers and spherical spreading. Conversely, the propagation of sound over long distances can be enhanced by source to receiver gradient winds and vertical temperature profiles that create downward refraction of the sound waves. While the nature of each of these phenomena is well understood, the prediction of the sound propagation over long distances from a large industrial source such as an open-cut mine is inconsistent with the measured sound pressure level attributed to the source. The uncertainty around the theoretical model predictions and the measured source sound pressure levels in a multi-source environment creates a control problem when managing day to day mining operations. This paper investigates the relationship between the measured and predicted sound pressure levels at three continuous noise monitors along a propagation path at distances of 500m, 1500m and 2500m from the source. The objective of the analysis was to reduce the uncertainty in the measurement of the source’s contribution at the noise monitor located in a multi-source environment 2500m from source.
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View more >The attenuation of a sound signal over long distances is accounted for by atmospheric absorption, atmospheric stability, ground effects, barriers and spherical spreading. Conversely, the propagation of sound over long distances can be enhanced by source to receiver gradient winds and vertical temperature profiles that create downward refraction of the sound waves. While the nature of each of these phenomena is well understood, the prediction of the sound propagation over long distances from a large industrial source such as an open-cut mine is inconsistent with the measured sound pressure level attributed to the source. The uncertainty around the theoretical model predictions and the measured source sound pressure levels in a multi-source environment creates a control problem when managing day to day mining operations. This paper investigates the relationship between the measured and predicted sound pressure levels at three continuous noise monitors along a propagation path at distances of 500m, 1500m and 2500m from the source. The objective of the analysis was to reduce the uncertainty in the measurement of the source’s contribution at the noise monitor located in a multi-source environment 2500m from source.
View less >
Conference Title
Proceedings of the 23rd International Congress on Acoustics (ICA 2019)
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Copyright Statement
© 2019 International Congress on Acoustics (ICA). The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the conference's website for access to the definitive, published version.
Subject
Environmental management
Acoustics and noise control (excl. architectural acoustics)