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Arrival-time fluctuations of coherent reflections from surface gravity water waves
Mohsen Badiey1, Justin Eickmeier1, Aijun Song1
1College of Earth, Ocean, and Environment, University of Delaware, 107 Robinson Hall, Newark, Delaware 19716 badiey@udel.edu, jeickmei@udel.edu, ajsong@udel.edu.
The Journal of the Acoustical Society of America
|May 13, 2014
Summary
Fluctuations in acoustic reflection arrival times from surface gravity waves were studied. A ray model accurately predicted deterministic striation patterns caused by rough sea surfaces, matching experimental data.
Area of Science:
- Ocean acoustics
- Wave dynamics
Background:
- Surface gravity waves significantly impact acoustic wave propagation.
- Understanding reflections from dynamic sea surfaces is crucial for underwater acoustics.
Purpose of the Study:
- To investigate the causes of arrival time fluctuations in coherent acoustic reflections.
- To model the formation of striation patterns from rough sea surfaces.
Main Methods:
- Utilized a two-dimensional ray model incorporating an evolving sea surface.
- Conducted bidirectional acoustic transmissions in a 100m deep water environment.
Main Results:
- Identified the mechanism behind deterministic striation pattern formation.
- Ray model predictions showed qualitative agreement with experimental measurements.
Conclusions:
- The developed ray model effectively explains acoustic reflection phenomena from dynamic sea surfaces.
- Experimental validation confirms the model's capability in predicting arrival time variations.
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