A geometric investigation of acoustical wavefront scattering and healing induced by ocean internal waves
Colosi, John A.
Reeder, D. Benjamin
MetadataShow full item record
Observed ocean acoustic wavefronts show surprising stability in long range acoustic transmission experiments. This suggests that ocean scattering processes tend to re-distribute acoustic energy dominantly along the wavefront rather than across it. The purpose of this thesis is to elucidate the physical mechanism for this type of scattering by presenting a ray based physical model. Analytic formulae are presented that predict wavefront distortions caused by ocean internal waves and other processes. Applications of this study include wavefront healing near underwater obstacles, out of plane scattering and the vertical redistribution of energy of off axis sources.
Showing items related by title, author, creator and subject.
Moore, Thomas R.; Walters, Donald L. (1988-08);Results of experiments on the dynamics of scattering in barium titanate are presented. Asymmetric scattering and centrosymmetric scattering are characterized as a function of incident-beam size, and photographs are ...
Acoustic scattering from sand dollars (dendraster excentricus) modeling as high aspect ratio oblate objects and comparison to experiment Dietzen, Gregory C. (Cambridge Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2008-09);Benthic shells can contribute greatly to the scattering variability of the ocean bottom, particularly at low grazing angles. Among the effects of shell aggregates are increased scattering strength and potential subcritical ...
Gaussian Beam Propagation in Maritime Atmospheric Turbulence: Long Term Beam Spread and Beam Wander Analysis Toselli, I.; Agrawal, B.N.; S. Restaino, (2010);Laser beam propagation in maritime environment is particularly challenging, not only for scattering and absorption due to high humidity, but also for a different behavior of atmospheric turbulence with respect to terrestrial ...