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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/3828

Title: Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization
Authors: Lepper, Paul A.
D’Spain, Gerald L.
Issue Date: 2007
Publisher: © Acoustical Society of America
Citation: LEPPER, P.A. and D'SPAIN, G.L., 2007. Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization. Journal of the Acoustical Society of America, 122 (2), pp. 892-295 [DOI: 10.1121/1.2749410]
Abstract: 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.
Description: This article was published in the Journal of the Acoustical Society of America [© Acoustical Society of America] and is also available at: http://asadl.org/
URI: https://dspace.lboro.ac.uk/2134/3828
ISSN: 0001-4966
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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