NONLINEAR PARAMETER ESTIMATION IN WATER-SATURATED SANDY SEDIMENT WITH DIFFERENCE FREQUENCY ACOUSTIC WAVES

Title
NONLINEAR PARAMETER ESTIMATION IN WATER-SATURATED SANDY SEDIMENT WITH DIFFERENCE FREQUENCY ACOUSTIC WAVES
Author(s)
김병남; 이강일; 윤석왕; 최복경; I.N.Didenkulov
KIOST Author(s)
Kim, Byoung Nam(김병남)Choi, Bok Kyoung(최복경)
Publication Year
2004-11-15
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.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/31631
Bibliographic Citation
Proceedings of the XV Session of the Russian Acoustical Society, pp.119 - 123, 2004
Publisher
Russian Acoustical Society
Type
Conference
Language
English
Publisher
Russian Acoustical Society
Related Researcher
Research Interests

Underwater Acoustics,Bubble Acoustics,Marine Defense & Safety,수중음향,기포음향,해양방위·안전

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