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Measurements of Sound Speed and Density Contrasts of the Moon Jellyfish (Aurelia aurita s.l.) for Hydroacoustic Model
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  • Journal title : Ocean and Polar Research
  • Volume 34, Issue 1,  2012, pp.85-91
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2012.34.1.085
 Title & Authors
Measurements of Sound Speed and Density Contrasts of the Moon Jellyfish (Aurelia aurita s.l.) for Hydroacoustic Model
Kang, Don-Hyug; Lee, Chang-Won; Lee, Hyung-Been; Kim, Mi-Ra;
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Physical properties such as sound speed contrast (h) and density contrast (g) of the interested target are key parameters to understand acoustic characteristics by using theoretical scattering models. The density and sound speed of moon jellyfish (common jellyfish, Aurelia aurita s.l.) were measured. Sound speed contrast (h) was measured from travel time difference (time-of-flight method) of an acoustic signal in a water tank for APOP studies (Acoustic Properties Of zooplankton). Density contrast (g) was measured by the displacement volume and wet weight (dual-density method). The sound speed remained almost constant as the moon jellyfish increased in bell length. The mean valuesstandard deviation of h and g were and ), respectively. These results will provide important input for use in theoretical scattering models for estimating the acoustic target strength of jellyfish.
hydroacoustic model;moon jellyfish;Aurelia aurita s.l.;sound speed contrast;density contrast;
 Cited by
한국연안에 있는 보름달물해파리의 체내 음속과 밀도 평가,윤은아;황두진;

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