@inproceedings{b726001a3ba744afa1d6a834dd5fb498,
title = "Broadband measurements of the seabed critical angle – Inferences for sound speed dispersion in a sandy sediment",
author = "Holland, \{Charles W.\} and Samuel Pinson and Derek Olson",
note = "Funding Information: The frequency dependence of sound speed, i.e., dispersion, in marine sediments has been a topic of considerable interest and remains a research topic. While laboratory measurements are useful, they are typically limited to somewhat idealized sediments at relatively high frequencies. In-situ measurements of dispersion at lower frequencies offer the advantage of realistic sediment assemblages but the disadvantage of competing frequency-dependent effects. Broadband 1.8-10 kHz seabed reflection measurements conducted in a sandy environmeofnf tthe coast of Panama Cit,yFL show that the critical angle is nearly independent of frequency across the entire band. Our interpretation of the data accounts for competing frequency-dependent effects of wavefront curvature, sound speed gradients, layering, roughness and shear waves. There is reasonably strong evidence from the observations that the sediment sound speed is nearly independent of frequency over the measurement band. [Research supported by the ONR Ocean Acoustics Program]; 13th International Conference on Theoretical and Computational Acoustics, ICTCA 2017 ; Conference date: 30-07-2017 Through 03-08-2017",
year = "2017",
language = "English (US)",
series = "13th International Conference on Theoretical and Computational Acoustics, ICTCA 2017",
publisher = "Institute of Mechanics and Mechatronics, Faculty of Mechanical, TU Wien",
pages = "179",
editor = "Manfred Kaltenbacher and Piotr Borejko and Florian Toth",
booktitle = "13th International Conference on Theoretical and Computational Acoustics, ICTCA 2017",
}