Acoustic bubble counting technique using sound speed extracted from sound attenuation

Sound attenuation has been solely used to estimate bubble size distributions of bubbly water in the conventional acoustic bubble sizing methods. These conventional methods are useful for the void fraction around 10/sup -6/ or lower. However, the change of compressibility in the bubbly water also sho...

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Bibliographic Details
Published in:IEEE journal of oceanic engineering 2001-01, Vol.26 (1), p.125-130
Main Authors: Choi, Bok Kyoung, Yoon, Suk Wang
Format: Article
Language:English
Subjects:
Acoustic noise
Acoustic scattering
Acoustic testing
Acoustics
Applied geophysics
Attenuation
Bubbles
Clouds
Counting
Dispersion
Earth sciences
Earth, ocean, space
Exact sciences and technology
Internal geophysics
Iterative methods
Marine
Marine geology
Mathematical models
Oceans
Resonance
Resonant frequency
Sizing
Sound
Sound attenuation
Studies
Void fraction
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Summary:Sound attenuation has been solely used to estimate bubble size distributions of bubbly water in the conventional acoustic bubble sizing methods. These conventional methods are useful for the void fraction around 10/sup -6/ or lower. However, the change of compressibility in the bubbly water also should be considered in bubble sizing for the void fraction around 10/sup -5/ or higher. Recently the sound speed as well as sound attenuation was considered for acoustic bubble size estimation in bubbly water. In this paper, the sound speed estimated from sound attenuation in bubbly water by an iterative method is used for a bubble counting. This new iterative inverse bubble sizing technique is numerically tested for bubble distributions of single-size Gaussian, and power-law functions. The numerical simulation results are in agreement with the given bubble distributions even for the high void fractions of 10/sup -4/-10/sup -3/. It suggests that the iterative inverse technique can be a very powerful tool for practical use in acoustic bubble counting in the ocean.
ISSN:0364-9059
1558-1691
DOI:10.1109/48.917945