Parameter estimation using multifrequency range‐dependent acoustic data in shallow water

1996 ◽  
Vol 99 (5) ◽  
pp. 2839-2850 ◽  
Author(s):  
Peter Gerstoft ◽  
Donald F. Gingras
Keyword(s):  
Parameter Estimation ◽  
Shallow Water ◽  
Acoustic Data

Geoacoustic inversion in shallow water using broadband synthetic aperture and single hydrophone acoustic data

2011 ◽  
Vol 130 (4) ◽  
pp. 2391-2391
Author(s):  
Bien Aik Tan ◽  
Peter Gerstoft ◽  
Caglar Yardim ◽  
William Hodgkiss
Keyword(s):  
Shallow Water ◽  
Synthetic Aperture ◽  
Geoacoustic Inversion ◽  
Acoustic Data

Analysis of shallow-water experimental acoustic data including a comparison with a broad-band normal-mode-propagation model

2001 ◽  
Vol 26 (3) ◽  
pp. 308-323 ◽  
Author(s):  
D.G. Simons ◽  
R. McHugh ◽  
M. Snellen ◽  
N.H. McCormick ◽  
E.A. Lawson
Keyword(s):  
Shallow Water ◽  
Normal Mode ◽  
Broad Band ◽  
Propagation Model ◽  
Mode Propagation ◽  
Acoustic Data

scholarly journals Self-similarity property of acoustic data acquired in shallow water environment

2013 ◽  
Vol 2013 (1) ◽  
Author(s):  
Jin Chen ◽  
Fa-jie Duan ◽  
Jia-jia Jiang ◽  
Baoju Zhang ◽  
Ying Tong ◽  
...  
Keyword(s):  
Shallow Water ◽  
Water Environment ◽  
Self Similarity ◽  
Acoustic Data ◽  
Shallow Water Environment

scholarly journals RESULTS OF EXPERIMENTAL HYDROACOUSTIC RESEARCHES ON EVALUATION OF SPATIAL DISTRIBUTION OF STURGEON UNDERYEARLINGS IN SHALLOW WATERS OF THE NORTHERN CASPIAN IN 2017

2019 ◽  
pp. 7-12
Author(s):  
Igor Borisovich Balchenkov ◽  
Tatiana Vasilievna Pomogaeva
Keyword(s):  
Shallow Water ◽  
Marine Fish ◽  
Sharp Decrease ◽  
Design Bureau ◽  
Near Surface ◽  
Acoustic Data ◽  
Vertical Location ◽  
Acoustic Surveys ◽  
Significant Underestimation ◽  
Research Institute

Since 2005, in the Russian part of the Northern Caspian, Caspian Research Institute of Fisheries has been conducting trawl-acoustic surveys to solve problems in determining the density, biomass and seasonal dynamics of commercial marine fish species. Recently, special attention has been paid to the estimation of the number of sturgeon fishes and their juveniles due to a sharp decrease in the concentrations of these fish in the areas of traditional trawl-acoustic surveys. Until 2015, sonar studies were carried out with the help of a fishfinder echosounder - a video plotter PEV-K, created in the Design Bureau of Marine Electronics “Vector” (Taganrog, Russia). Taking into account the shallow water of the Northern Caspian (depth 3-10 m), this echo sounder of the vertical location gave an insufficiently qualitative quantitative estimate of marine fish concentrations. According to the latest works in the field of acoustics on shallow water bodies, significant shortcomings in the use of vertical echolocation only have been identified, due to a significant underestimation of fish in the near-surface layer in shallow water conditions. It is proved that the most optimal alternative for conducting trawl-acoustic surveys is the simultaneous use of vertical and horizontal echolocation. Solving the actual problems of obtaining representative acoustic data, Caspian Research Institute of Fisheries acquired EY-60 hydroacoustic complex from “Simrad”, using the complex allows simultaneous horizontal and vertical echolocation. Within 2015-2017, with the help of this complex, a survey considering sturgeon yearlings was regularly conducted in the Northern Caspian.

Inversion of shallow water ocean acoustic data using a complex plane-wave reflection coefficient approach

2002 ◽  
Vol 111 (5) ◽  
pp. 2333
Author(s):  
Steven Stotts ◽  
David Knobles ◽  
Robert Koch ◽  
Adam Cook ◽  
David Grant ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Plane Wave ◽  
Shallow Water ◽  
Complex Plane ◽  
Wave Reflection ◽  
Acoustic Data
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