Bubbles interact strongly with sound fields. Gas bubbles in the ocean generate sound as they are produced by breaking waves, rainfall, methane seeps, etc., and such emissions can be used to size and count the bubbles present. However after production, when the pulsations of such bubbles have damped away, they are silent unless re-excited. These, and other bubbles in the ocean that do not generally make significant passive sound emissions (such as those that appear through exsolution, and a range of biological processes including decomposition, photosynthesis, respiration and digestion) can still strongly influence applied sound fields through scattering, and changing the sound speed and absorption from that which would be expected in bubble-free water. This paper discusses how these phenomena might be associated with bubble netting by cetaceans. When driven with appropriate acoustic fields, bubbles can change their surrounding environment, and examples of this are shown through the generation of cleaning in an ultrasonically-activated stream of cold water, without additives.
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23 September 2015
5th Pacific Rim Underwater Acoustics Conference
23-26 September 2015
Vladivostok, Russia
December 10 2015
The acoustic bubble: Oceanic bubble acoustics and ultrasonic cleaning Free
Timothy G. Leighton
Timothy G. Leighton
1Institute of Sound and Vibration Research, Faculty of Engineering and the Environment,
University of
Southampton
, Highfield, Southampton SO17 1BJ, UK
; [email protected]1Institute of Sound and Vibration Research, Faculty of Engineering and the Environment,
University of
Southampton
, Highfield, Southampton SO17 1BJ, UK
; [email protected]
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Timothy G. Leighton
1,1
1Institute of Sound and Vibration Research, Faculty of Engineering and the Environment,
University of
Southampton
, Highfield, Southampton SO17 1BJ, UK
; [email protected]1Institute of Sound and Vibration Research, Faculty of Engineering and the Environment,
University of
Southampton
, Highfield, Southampton SO17 1BJ, UK
; [email protected]Proc. Mtgs. Acoust. 24, 070006 (2015)
Article history
Received:
November 06 2015
Accepted:
December 04 2015
Citation
Timothy G. Leighton; The acoustic bubble: Oceanic bubble acoustics and ultrasonic cleaning. Proc. Mtgs. Acoust. 23 September 2015; 24 (1): 070006. https://doi.org/10.1121/2.0000121
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