Noise characterisation of the Aurora Australis while stationary in Antarctic sea ice

This work investigates the underwater noise propagation of the primary vessel used by the Australian Antarctic Division Aurora Australis while stationary in a configuration and location suitable for under-ice Autonomous Underwater Vehicle (AUV) deployment. It outlines a novel method for recording an...

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Bibliographic Details
Published in:Ocean Engineering
Main Authors: Alexander, P, Duncan, A, Bose, N, Wilkes, D, Lewis, R, de Souza, P
Format: Article in Journal/Newspaper
Language:English
Published: Pergamon-Elsevier Science Ltd 2014
Subjects:
Engineering
Maritime Engineering
Naval Architecture
Antarctic
Low Point
Antarc*
aurora australis
Australian Antarctic Division
Sea ice
Online Access:https://doi.org/10.1016/j.oceaneng.2014.02.030
http://ecite.utas.edu.au/92509
Description
Summary:This work investigates the underwater noise propagation of the primary vessel used by the Australian Antarctic Division Aurora Australis while stationary in a configuration and location suitable for under-ice Autonomous Underwater Vehicle (AUV) deployment. It outlines a novel method for recording and validating the noise of a vessel using available equipment and standard deployment options. Numerical modelling using the Fast Multipole Boundary Element Method (FMBEM) is combined with the response to a calibrated source to assess the limitations and residual uncertainty of the experiment. The results of this work indicate that there is a 10 dB re 1 μPa reduction in mean noise by removal of main engine noise and a low point in ship noise at 3.8 kHz. Two hundred metres depth was found to be a preferred depth for uniformity in the noise field.

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