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A Study on the Conversion Condition of Shallow Water 3-layered Model into 2-layered Model with Correlation  

Kim, Young-Sun (국방과학연구소)
Kim, Sung-Boo (부경대학교 물리학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.27, no.2, 2008 , pp. 92-101 More about this Journal
Abstract
To dissolve the multi-layered model problems, and to complement 2-layered model's simplicity, assumed fluid-fluid-solid 3-layered model. Generally it is known that if the sediment thickness is more than 10 wavelength, the half space's influence to the in-water acoustic field could be disregarded. By tracking the maximum correlation coefficient of calculated results and experimental ones we confirmed that the requirement could be more realized. To calculate the maximum correlation coefficient we used single sensor transmission loss. On the assumption that the sediment sound velocity was 1813 m/s and frequency range 50 kHz to 120 kHz, the conversion condition was from 2.5 to 7.7 wavelength.
Keywords
3-layered model; Sediment thickness; Correlation; Conversion condition;
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  • Reference
1 F. R. Dipoli, "Fast Field Program for Multilayered Media," Rep. 4103, Naval Underwater Systems Center, New London, CT, 1971
2 김성부, 김상한, "천해에서의 음파전달에 관한 모형실험," 한국음향학회, 15(2), 101-104, 1996
3 김영선, 김성부, "2개의 해저층으로 구성된 천해 음파전달에 관한 모델 연구," 한국음향학회, 20(4), 71-80, 2001
4 C. S. Pekeris, "Theory of propagation of explosive sound in shallow water, " Geol. Soc. Am., Mem. 27, 1-117, 1948
5 C. A. Boyles, Acoustic Waveguides, (John Wiley & Sons, 1984.)
6 Edwin L. Hamilton, "Geoacoustic modeling of the sea floor" J. Acoust. Soc. Am. 68(5), 1313-1340, 1980   DOI   ScienceOn
7 Melvin A. Pedersen, David F. Gordon, "Normal-Mode Theory Applied to Short-Range Propagation in an Underwater Acoustic Surface Duct," J. Acoust. Soc. Am. 37(1), 105-118, 1965   DOI
8 L. M. Brekhovskikh, Waves in Layered Media, (Academic Press, 1980)
9 Mark K. Macpherson, George V. Frisk, "The contribution of normal modes in the bottom to the acoustic field in the ocean," J. Acoust. Soc. Am. 68(3), 929-940, 1980   DOI   ScienceOn
10 M. B. Porter, "The KRAKEN Normal Mode Program," NRL/MR/ 5120-92-65, 1992
11 김성부, 김상한, "천해에서 가상모드가 포함된 음파전달에 관한 모형실험," 한국음향학회, 16(8), 68-73, 1997
12 F. B. Jensen, W A Kuperman, M. B. Porter, H. Schmidt, Computational Ocean Acoustics, (American Institute of Physics, 1994.)
13 김성부, 박사학위 논문, "천해에서 가상모드가 포함된 음파전달에 관한 모형실험," 경성대학교, 1996
14 Henrik Schmidt, Finn B. Jensen, "A full wave solution for propagation in multilayered viscoelastic media with application to Gaussian beam reflection at fluid-solid interfaces," J. Acoust. Soc. Am. 77(3), 813-825, 1984   DOI
15 I. Tolstoy, C. S. Clay, Ocean Acoustics, (McGraw-Hill), pp24-126, 1966
16 H. Schmidt, "User Guide and Reference Manual," Massachusetts Institute of Technology, 1999
17 W. M. Ewing, W. S. Jardetzky, F. Press, Elastic Waves in Layered Media, (McGRAW-HILL Book company, inc., 1957.)