NDLI: Underwater acoustic communication channel characterization in the presence of bubbles and rough sea surfaces

Content Provider	IEEE Xplore Digital Library
Author	Boyles, C.A. Rosenberg, A.P. Qinqing Zhang
Copyright Year	2011
Description	Author affiliation: Johns Hopkins University, Applied Physics Laboratory, Laurel, MD, 20723 (Boyles, C.A.; Rosenberg, A.P.; Qinqing Zhang)
Abstract	In this paper we model the underwater acoustic communication channel in shallow water. We put particular emphasis on the effect of the bubbles caused by wave breaks under strong winds. Underwater bubble clouds provide locally significant modifications of the sound speed field. The modified sound speed field contributes to a major transmission loss to sound propagation and scattering of the signals. We adopt the bubble field model developed by Norton, et al., generate range dependent discrete bubble plumes and compute the sound speed profile of each bubble plume. In addition, we model the rough surface using a spectral model to generate realizations of rough sea surfaces. With a bubble perturbed sound speed field and sea surface spectrum, we model the communication channel using a rough surface parabolic equation model to generate a complex pressure field at a selected set of ranges and depths. These pressure fields form the basic frequency response of the channel. Our results show that under strong winds, bubbles contribute to large transmission loss and cannot be neglected. Furthermore, for high wind speeds the dominate attenuation mechanism is the scattering from the bubble plumes rather than the scattering from a rough sea surface.
Starting Page	1
Ending Page	8
File Size	2900238
Page Count	8
File Format	PDF
ISBN	9781457700866
e-ISBN	9781457700880
DOI	10.1109/Oceans-Spain.2011.6003516
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-06
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sea surface Surface roughness Rough surfaces Propagation losses Wind speed Attenuation Scattering
Content Type	Text
Resource Type	Article

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