Density and sound speed contrasts of the Japanese common squid Todarodes pacificus and their influence on acoustic target strength SCIE SCOPUS

Cited 6 time in WEB OF SCIENCE Cited 6 time in Scopus
Title
Density and sound speed contrasts of the Japanese common squid Todarodes pacificus and their influence on acoustic target strength
Author(s)
Kang, Donhyug; Iida, Kohji; Mukai, Tohru; Kim, Jongman
KIOST Author(s)
Kang, Don Hyug(강돈혁)
Publication Year
2006-08
Abstract
In this study, density and sound speed contrasts were measured for the Japanese common squid Todarodes pacificus. Target strength (TS) data derived from an acoustic scattering model based on measurements of these two parameters were compared with TS values based on acoustic measurement data to determine whether the measured parameters are reasonable values for theoretical scattering model. Density contrast (g) was measured from the displacement volume and wet weight, while sound speed contrast (h) was measured from the acoustic measurements of travel time (time-of-flight method). The Kirchhoff ray mode model, which represents the squid body as a set of fluid-filled cylinders, was used to calculate theoretical TS. Mean g- and h-values of the squid were 1.029 and 1.041, respectively. Comparison with previous data showed that g was similar, whereas h was relatively high. The difference in the TS between the theoretical model using measured parameters and the acoustic measurement was within 3 dB. Thus, the measured g- and h-values are acceptable for theoretical models of squid.
ISSN
0919-9268
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4862
DOI
10.1111/j.1444-2906.2006.01211.x
Bibliographic Citation
FISHERIES SCIENCE, v.72, no.4, pp.728 - 736, 2006
Publisher
BLACKWELL PUBLISHING
Subject
ZOOPLANKTON; FISH
Keywords
density contrast; Japanese common squid; scattering model; sound speed contrast; target strength; Todarodes pacificus
Type
Article
Language
English
Document Type
Article
Publisher
BLACKWELL PUBLISHING
Related Researcher
Research Interests

Marine security,Underwater Acoustics,해양방위,수중음향

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