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Underwater noise emissions from bubble clouds

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3 Author(s)
Lu, N.Q. ; Dept. of Mech. Eng., Johns Hopkins Univ., Baltimore, MD, USA ; Prosperetti, A. ; Yoon, S.W.

By means of an effective equation model for the propagation of pressure waves in a bubbly liquid, the normal modes of oscillation of regions of bubbly liquid in an otherwise pure liquid are calculated for some simple geometries. It is shown that the frequencies of oscillation of such bubble clouds can be much lower than those of the constituent bubbles in isolation and fall well within the range where substantial wind-dependent noise is observed in the ocean. A comparison with some experimental data strongly supports the theoretical results

Published in:

Oceanic Engineering, IEEE Journal of  (Volume:15 ,  Issue: 4 )