On underwater sound reflection from layered ice sheets
Abstract
Reflection of sound from ice sheets floating on water is simulated using Thomson and Haskell's method of matrix propagation. The reflection coefficient is computed as a function of incidence angle and frequency for selected ice parameters of a uniform sheet and two layered ice sheets. At some incidence angles and frequencies the reflection coefficient has very low values. It is shown that this is related to generation of Lamb waves in the ice. The matrix propagation method also provides a dispersion equation for a plate loaded with fluid on one side and vacuum on the other. Finally the concept of beam displacement is briefly discussed.
Keywords
Cite
@article{arxiv.1604.02247,
title = {On underwater sound reflection from layered ice sheets},
author = {Halvor Hobæk and Hanne Sagen},
journal= {arXiv preprint arXiv:1604.02247},
year = {2016}
}
Comments
21 pages, 11 figures, 1 table; part of the Proceedings of the 39th Scandinavian Symposium on Physical Acoustics (arXiv:1604.01763)