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DTIC ADA427310: Analysis of the Influence of Turbulence and Environ... |
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by Defense Technical Information Center |
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Acoustic propagation in the littoral regions of the |
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world, even over short ranges, can be complex at high |
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frequencies (5 kHz), and applications such as underwater |
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detection and communications suffer as a result. To this |
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end, the Asian Seas International Acoustics Experiment |
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(ASIAEX) was conducted with funding from the Office of |
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Naval Research. One phase of this experiment took place |
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from 29 May to 9 June 2001 and focused on short-range, |
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shallow water acoustic propagation in the East China Sea. |
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This thesis will be based on some of the measurements |
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taken during the East China Sea experiment by a team from |
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the Applied Physics Laboratory of the University of |
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Washington. The environmental parameters and array |
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geometry used in this and previous modeling work are as |
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close as possible to the experiment. The objective of |
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this thesis is to better understand the nature of |
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turbulent perturbations and how they affect short-range |
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acoustic propagation in a shallow water environment. This |
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will include variations in total energy of the |
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turbulence, variations in associated length scales, and |
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variations in depth. In addition, the influence of other |
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variable factors on signal coherence will also be |
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examined. Most notably, variations in background sound- |
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speed structure and source depth variability will be |
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included. |
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Date Published: 2018-05-21 22:07:06 |
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Identifier: DTIC_ADA427310 |
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Item Size: 34005690 |
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Language: english |
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Media Type: texts |
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