Atmospheric noise of a breaking tidal bore

Chanson, Hubert (2016) Atmospheric noise of a breaking tidal bore. Journal of the Acoustical Society of America, 139 1: 12-20. doi:10.1121/1.4939113

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Author Chanson, Hubert
Title Atmospheric noise of a breaking tidal bore
Journal name Journal of the Acoustical Society of America   Check publisher's open access policy
ISSN 0001-4966
Publication date 2016
Sub-type Article (original research)
DOI 10.1121/1.4939113
Open Access Status Other
Volume 139
Issue 1
Start page 12
End page 20
Total pages 8
Place of publication Melville, NY, United States
Publisher AIP Publishing LLC
Collection year 2017
Language eng
Abstract A tidal bore is a surge of waters propagating upstream in an estuary as the tidal flow turns to rising and the flood tide propagates into a funnel-shaped system. Large tidal bores have a marked breaking roller. The sounds generated by breaking tidal bores were herein investigated in the field (Qiantang River) and in laboratory. The sound pressure record showed two dominant periods, with some similarity with an earlier study [Chanson (2009). J. Acoust. Soc. Am. 125(6), 3561–3568]. The two distinct phases were the incoming tidal bore when the sound amplitude increased with the approaching bore, and the passage of the tidal bore in front of the microphone when loud and powerful noises were heard. The dominant frequency ranged from 57 to 131 Hz in the Qiantang River bore. A comparison between laboratory and prototype tidal bores illustrated both common features and differences. The low pitch sound of the breaking bore had a dominant frequency close to the collective oscillations of bubble clouds, which could be modeled with a bubble cloud model using a transverse dimension of the bore roller. The findings suggest that this model might be over simplistic in the case of a powerful breaking bore, like that of the Qiantang River.
Keyword Atmospheric noise
Tidal bore
Breaking bores
Air bubble entrainment
Qiantang River bore
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
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Created: Tue, 05 Jan 2016, 20:29:19 EST by Hubert Chanson on behalf of School of Civil Engineering