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A Study of the Effects on Transmission Loss of Modelled Water Column Variations within an Area off the East Australian Coast

A Study of the Effects on Transmission Loss of Modelled Water Column Variations within an Area... The present accuracy of ocean and atmospheric models permits the description of water column features, and sea surface wind stress, at a resolution which enables employment in underwater acoustic transmission applications. In an investigation of aspects of linking modelled ocean data with range-dependent acoustic transmission models, a Parabolic Equation (PE) transmission code was used with data generated by the BLUElink suite of ocean and atmospheric models for a deep-water region off the east Australian coast for a particular summer period. A typical presence of warm and cold core eddies was observed to accompany a highly variable acoustic environment. Variations in expected range to particular levels of Transmission Loss were found to be mainly related to changes in the depth of the mixed surface layer, but also due to changes in the sound speed gradient in the thermocline. The study also made a brief consideration of the likely impact of wind speed variation over the region, and the effects of modelled ocean currents on acoustic transmission. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acoustics Australia Springer Journals

A Study of the Effects on Transmission Loss of Modelled Water Column Variations within an Area off the East Australian Coast

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References (11)

Publisher
Springer Journals
Copyright
Copyright © 2017 by Australian Acoustical Society
Subject
Engineering; Engineering Acoustics; Acoustics; Noise Control
ISSN
0814-6039
eISSN
1839-2571
DOI
10.1007/s40857-017-0110-y
Publisher site
See Article on Publisher Site

Abstract

The present accuracy of ocean and atmospheric models permits the description of water column features, and sea surface wind stress, at a resolution which enables employment in underwater acoustic transmission applications. In an investigation of aspects of linking modelled ocean data with range-dependent acoustic transmission models, a Parabolic Equation (PE) transmission code was used with data generated by the BLUElink suite of ocean and atmospheric models for a deep-water region off the east Australian coast for a particular summer period. A typical presence of warm and cold core eddies was observed to accompany a highly variable acoustic environment. Variations in expected range to particular levels of Transmission Loss were found to be mainly related to changes in the depth of the mixed surface layer, but also due to changes in the sound speed gradient in the thermocline. The study also made a brief consideration of the likely impact of wind speed variation over the region, and the effects of modelled ocean currents on acoustic transmission.

Journal

Acoustics Australia – Springer Journals

Published: Sep 1, 2017

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