Field measurements and modeling of attenuation from near-surface bubbles for frequencies 1-20 kHz

Peter H. Dahl; Jee Woong Choi; Neil J. Williams; Hans C Graber

doi:10.1121/1.2963096

Field measurements and modeling of attenuation from near-surface bubbles for frequencies 1-20 kHz

Peter H. Dahl, Jee Woong Choi, Neil J. Williams, Hans C Graber

Ocean Sciences

Research output: Contribution to journal › Article

19 Scopus citations

Abstract

Measurements of excess attenuation from near-surface bubbles from the Shallow Water '06 experiment are reported. These are transmission measurements made over the frequency range 1-20 kHz, and they demonstrate a frequency, grazing angle, and wind speed dependence in attenuation. Data modeling points to bubble void fractions of order 10-6 in effect for wind speeds 10-13 ms. Simultaneous measures of wind speed made within 1.5 and 11 km of the open water experimental location differed by 2 ms in their respective 30 min average; this has cautionary implications for empirical models for bubble attenuation that are a strong function of wind speed.

Original language	English (US)
Journal	Journal of the Acoustical Society of America
Volume	124
Issue number	3
DOIs	https://doi.org/10.1121/1.2963096
State	Published - 2008

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ASJC Scopus subject areas

Acoustics and Ultrasonics

Cite this

Dahl, P. H., Choi, J. W., Williams, N. J., & Graber, H. C. (2008). Field measurements and modeling of attenuation from near-surface bubbles for frequencies 1-20 kHz. Journal of the Acoustical Society of America, 124(3). https://doi.org/10.1121/1.2963096

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10.1121/1.2963096