NONLINEAR PARAMETER ESTIMATION IN WATER-SATURATED SANDY SEDIMENT WITH DIFFERENCE FREQUENCY ACOUSTIC WAVES
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Title
- NONLINEAR PARAMETER ESTIMATION IN WATER-SATURATED SANDY SEDIMENT WITH DIFFERENCE FREQUENCY ACOUSTIC WAVES
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Author(s)
- 김병남; 이강일; 윤석왕; 최복경; I.N.Didenkulov
- KIOST Author(s)
- Kim, Byoung Nam(김병남); Choi, Bok Kyoung(최복경)
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Alternative Author(s)
- 김병남; 최복경
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Publication Year
- 2004-11-15
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Abstract
- Nonlinear acoustic responses of water-saturated sediments are very important to understand nonlinear phenomena of gassy ocean sediments. Especially, the second harmonic, the sum and the difference frequency acoustic waves in water-saturated sediments can provide practical criteria to estimate the nonlinear parameter of gassy sediments. In this paper, the difference frequency acoustic wave in water-saturated sandy sediment was observed in a water tank experiment with a pulse transmission technique. Its pressure level was 12 dB higher than the background noise level at a maximum undistorted driving pressure of source acoustic transducer. The experimental results were compared with a theoretical estimation of the parametric acoustic array. The nonlinear parameter of water-saturated sandy sediment was also estimated as 73 with their comparison. Thisvalue can be utilized as the background information to estimate gas void fraction in the water-saturated gassy sandy sediment.
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/31631
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Bibliographic Citation
- Proceedings of the XV Session of the Russian Acoustical Society, pp.119 - 123, 2004
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Publisher
- Russian Acoustical Society
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Type
- Conference
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Language
- English
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