DocumentCode :
2122074
Title :
Ambiguity surface manifestation of downslope converted noise sources
Author :
Tran, Jean-Marie Q D ; Hodgkiss, W.S.
Author_Institution :
Scripps Instn. of Oceanogr., California Univ., San Diego, La Jolla, CA, USA
fYear :
1993
fDate :
18-21 Oct 1993
Abstract :
Deals with the manifestation of downslope converted continental shelf noise sources (primarily ships) in the matched-field processor (MFP) ambiguity surface. Of interest is how noise sources outside the range of interest leak into the ambiguity surface through the sidelobe structure of the effective MFP beam (or cell) pattern. This study is carried out with simulations using the parabolic equation model. A shallow 18 Hz source is assumed deployed at various locations on the continental slope, 1750 km from a 1000 m long vertical line array. The MFP search window extends in range across 500 km and in depth down to 1000 m. Shallow sources on the slope show up in the MFP ambiguity surface as deep peaks when downslope conversion takes place. Shallow sources at locations on the slope or in deep water adjacent to the slope where downslope conversion does not take place, appear in the MFP ambiguity surface as shallow sources
Keywords :
acoustic noise; oceanography; underwater sound; water pollution; 18 Hz; acoustic noise; ambiguity surface manifestation; continental shelf noise source; downslope converted noise source; marine pollution; matched-field processor; ocean sea underwater sound; parabolic equation model; propagation; ship; simulation; Acoustic noise; Acoustic propagation; Computational modeling; Equations; Laboratories; Marine vehicles; Propagation losses; Sea surface; Solid modeling; Water resources;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
OCEANS '93. Engineering in Harmony with Ocean. Proceedings
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-1385-2
Type :
conf
DOI :
10.1109/OCEANS.1993.326218
Filename :
326218
Link To Document :
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