Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization

The performance of traditional techniques of passive localization in ocean acoustics such as time-of-arrival (phase differences) and amplitude ratios measured by multiple receivers may be degraded when the receivers are placed on an underwater vehicle due to effects of scattering. However, knowledge...

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Main Authors:	Paul Lepper, Gerald L. D’Spain
Format:	Default Article
Published:	2007
Subjects:	Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/3828
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id	rr-article-9575189
record_format	Figshare
spelling	rr-article-95751892007-01-01T00:00:00Z Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization Paul Lepper (1252317) Gerald L. D’Spain (4543414) Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified The performance of traditional techniques of passive localization in ocean acoustics such as time-of-arrival (phase differences) and amplitude ratios measured by multiple receivers may be degraded when the receivers are placed on an underwater vehicle due to effects of scattering. However, knowledge of the interference pattern caused by scattering provides a potential enhancement to traditional source localization techniques. Results based on a study using data from a multi-element receiving array mounted on the inner shroud of an autonomous underwater vehicle show that scattering causes the localization ambiguities side lobes to decrease in overall level and to move closer to the true source location, thereby improving localization performance, for signals in the frequency band 2–8 kHz. These measurements are compared with numerical modeling results from a two-dimensional time domain finite difference scheme for scattering from two fluid-loaded cylindrical shells. Measured and numerically modeled results are presented for multiple source aspect angles and frequencies. Matched field processing techniques quantify the source localization capabilities for both measurements and numerical modeling output. © 2007 Acoustical Society of America. 2007-01-01T00:00:00Z Text Journal contribution 2134/3828 https://figshare.com/articles/journal_contribution/Measurement_and_modeling_of_the_acoustic_field_near_an_underwater_vehicle_and_implications_for_acoustic_source_localization/9575189 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified
spellingShingle	Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified Paul Lepper Gerald L. D’Spain Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization
description	The performance of traditional techniques of passive localization in ocean acoustics such as time-of-arrival (phase differences) and amplitude ratios measured by multiple receivers may be degraded when the receivers are placed on an underwater vehicle due to effects of scattering. However, knowledge of the interference pattern caused by scattering provides a potential enhancement to traditional source localization techniques. Results based on a study using data from a multi-element receiving array mounted on the inner shroud of an autonomous underwater vehicle show that scattering causes the localization ambiguities side lobes to decrease in overall level and to move closer to the true source location, thereby improving localization performance, for signals in the frequency band 2–8 kHz. These measurements are compared with numerical modeling results from a two-dimensional time domain finite difference scheme for scattering from two fluid-loaded cylindrical shells. Measured and numerically modeled results are presented for multiple source aspect angles and frequencies. Matched field processing techniques quantify the source localization capabilities for both measurements and numerical modeling output. © 2007 Acoustical Society of America.
format	Default Article
author	Paul Lepper Gerald L. D’Spain
author_facet	Paul Lepper Gerald L. D’Spain
author_sort	Paul Lepper (1252317)
title	Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization
title_short	Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization
title_full	Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization
title_fullStr	Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization
title_full_unstemmed	Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization
title_sort	measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization
publishDate	2007
url	https://hdl.handle.net/2134/3828
_version_	1796652561152868352

Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization

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