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

被引：25
|
作者：
Dahl, Peter H. [1 ]
Choi, Jee Woong [2 ]
Williams, Neil J. [3 ]
Graber, Hans C. [3 ]
机构：
[1] Univ Washington, Appl Phys Lab, Seattle, WA 98105 USA
[2] Hanyang Univ, Dept Environm Marine Sci, Ansan, South Korea
[3] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, AMP, Miami, FL 33149 USA
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2008年 / 124卷 / 03期
关键词：
D O I：
10.1121/1.2963096
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
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 m/s. Simultaneous measures of wind speed made within 1.5 and 11 km of the open water experimental location differed by 2 m/s in their respective 30 min average; this has cautionary implications for empirical models for bubble attenuation that are a strong function of wind speed. (C) 2008 Acoustical Society of America.
引用
收藏
页码：EL163 / EL169
页数：7
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