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High-Frequency Bottom Loss Measured at Near-Normal Incidence Grazing Angle in Jinhae Bay  

La, Hyoung-Sul (한국해양연구원 부설 극지연구소 극지기후연구부)
Park, Chi-Hyung (한양대학교 과학기술대학 해양환경과학과 해양음향연구실)
Cho, Sung-Ho (한양대학교 과학기술대학 해양환경과학과 해양음향연구실)
Choi, Jee-Woong (한양대학교 과학기술대학 해양환경과학과 해양음향연구실)
Na, Jung-Yul (한양대학교 과학기술대학 해양환경과학과 해양음향연구실)
Yoon, Kwan-Seob (LIG 넥스원(주) 연구개발본부 수중 연구소)
Park, Kyung-ju (해군사관학교)
Park, Joung-Soo (국방과학연구소)
Publication Information
The Journal of the Acoustical Society of Korea / v.29, no.4, 2010 , pp. 223-228 More about this Journal
Abstract
High-frequency bottom loss measurements for grazing angle of $82^{\circ}$ in frequency range 17-40 kHz were made in Jinhae bay in the southern part of Korea. Observations of bottom loss showed the strong variation as a function of frequency, which were compared to the predicted values using two-layered sediment reflection model. The geoacoustic parameters including sound speed, density and attenuation coefficient for the second sediment layer were predicted from the empirical relations with the mean grain size obtained from sediment core analysis. The geoacoustic parameters for the surficial sediment layer were inverted using Monte Carlo inversion algorithm. A sensitivity study for the geoacoustic parameters showed that the thickness of surficial sediment layer was most sensitive to the variation of the bottom loss.
Keywords
Bottom Loss; Two-Layered Sediment; Reflection Model; Frequency Dependence;
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Times Cited By KSCI : 2  (Citation Analysis)
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