Acoustic pressure reflection coefficients of a subsurface bubble layer in water SCOPUS KCI OTHER

Title
Acoustic pressure reflection coefficients of a subsurface bubble layer in water
Author(s)
Lee, K.I.; Choi, B.K.; Yoon, S.W.
KIOST Author(s)
Choi, Bok Kyoung(최복경)
Publication Year
2002-06
Abstract
Acoustic scattering and absorption of a bubble layer near the ocean surface are very important information to understand sound propagation in the ocean. Such a subsurface bubble layer plays significant roles as a source and a scatterer of underwater sound. The acoustic pressure reflection coefficient from bubbly liquids is theoretically derived from a three-medium analysis for the subsurface bubble layer. The reflection coefficient from the subsurface bubble layer is also experimentally measured at normal incidence in water and compared with the prediction obtained from the three-medium analysis. It is found that most of the sound waves are reflected near the resonance frequencies of individual bubbles in the subsurface bubble layer. The reflection coefficients at the resonance frequencies are strongly affected by the bubble size distribution of the bubble layer, and the amplitudes of reflected waves are affected by the void fraction. The theoretical predictions of the reflection coefficient are in good agreement with the experimental measurements. The small discrepancies between predictions and measurements may be due to the uncertainty in the measurement of the bubble size distribution of the bubble layer.
ISSN
0374-4884
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5767
Bibliographic Citation
Journal of the Korean Physical Society, v.40, no.2, pp.256 - 263, 2002
Keywords
Acoustic backscattering; Acoustic pressure reflection coefficient; Sound attenuation; Sound speed; Sound wave; Subsurface bubble layer
Type
Article
Language
English
Document Type
Article
Related Researcher
Research Interests

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

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