An acoustic scattering model for forests.

1991 ◽  
Vol 90 (4) ◽  
pp. 2368-2368
Author(s):  
James C. Rogers ◽  
Pu Chen ◽  
Arnold Mueller
Keyword(s):  
Acoustic Scattering ◽  
Scattering Model

An acoustic scattering model for stratification interfaces

2021 ◽  
Vol 150 (6) ◽  
pp. 4353-4361
Author(s):  
Elizabeth Weidner ◽  
Thomas C. Weber
Keyword(s):  
Acoustic Scattering ◽  
Scattering Model

scholarly journals Estimation of the Coefficients of the Equation of Acoustic Target Strength Based on the Morphology of Coregonus migratorius (Georgi, 1775) Swim Bladder

2020 ◽  
Vol 15 (1) ◽  
pp. 89-98
Author(s):  
P. N. Anoshko ◽  
M. M. Makarov ◽  
S. B. Popov ◽  
A. I. Degtev ◽  
N. N. Denikina ◽  
...  
Keyword(s):  
Acoustic Scattering ◽  
Morphological Characteristics ◽  
Prolate Spheroid ◽  
The Body ◽  
Target Strength ◽  
Fish Length ◽  
Swim Bladder ◽  
Experimental Conditions ◽  
Scattering Model ◽  
Acoustic Target

Aim. The aim of the study was to estimate the coefficients of the equation TSmax=f(SL) considering the characteristics of an acoustic scattering model based on the morphological characteristics of the swim bladder of the Coregonus migratorius (Georgi, 1775). Material and Methods. Ninety‐nine living specimens of C. migratorius served as the study material. For each specimen, the target strength in the cage was measured using an Kongsberg Simrad EY500 echo sounder and the morphology of the swim bladder was studied. Measurements, analysis of images and data were conducted using Image Pro 6.0. Excel and SciLab software resources. Results. We determined the main morphological characteristics of the swim bladder in C. migratorius as well as the correspondence of its dimensions and proportions in relation to the length of the fish’s body. The coefficients of the equation TS=20log(SL)‐60, calculated on the results of the acoustic scattering model of a prolate spheroid, agree well with the coefficients calculated from maximum values obtained in the cage experiment. During the conversion of the coefficients relating to the allometric changes in the length of the swim bladder relative to fish length, the equation TS=23.2log(SL)‐64.4 was obtained. A comparative analysis of the available equations of the target strength for C. migratorius with those obtained in the study was undertaken. Conclusion. The equation obtained on the model of the swim bladder as a prolate spheroid adequately describes the dependence of the maximum values of the target strength on the body length of the C. migratorius and confirms the previously obtained dependence by maximum values of TS in the cage experimental conditions and can serve as a basis for further theoretical studies.

A Simple Acoustic Scattering Model for Ensembles of Rocks and Seashells Lying on the Ocean Floor

1998 ◽  
Author(s):  
Christopher Feuillade ◽  
Mel D. Wagstaff ◽  
Roger W. Meredith
Keyword(s):  
Acoustic Scattering ◽  
Ocean Floor ◽  
Scattering Model
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