Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Ocean acoustics"”.
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Elastic sandwich problem: ocean acoustics in Arctic environments
… elastic ice layer as the upper boundary of the ocean acoustic waveguide and an elastic half-space seafloor as the lower boundary. An analytic normal mode solution for the problem of ocean acoustic propagation in this waveguide is found and then simulated numerically. The solution is benched …
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Stochastic acoustic ray tracing with dynamically orthogonal equations
… and computationally efficient models for ocean acoustics is inherently challenging due to several factors including the complex physical processes and the need to provide results on a large range of scales. Furthermore, the ocean itself is an inherently dynamic environment within the …
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Underwater acoustic signal behavior prediction in the region of Kauai Island
… describe sound propagation phenomena in various ocean environments. The key to understanding and visualizing is mathematical modeling. In the ocean acoustics community, four major mathematical techniques have been commonly used to model behavior of acoustic signal in the ocean environment. And …
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Underwater sound propagation and acoustic communication in a time-varying shallow estuarine environment
… are water regions that connect rivers and oceans, which are very important due to heavy traffic, fishery and other coastal engineering activities. Underwater acoustic technology offers a series of effective applications and technical supports for real-time monitoring and long-term …
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Stochastic acoustic ray tracing with dynamically orthogonal equations
… and computationally efficient models for ocean acoustics is inherently challenging due to several factors including the complex physical processes and the need to provide results on a large range of scales. Furthermore, the ocean itself is an inherently dynamic environment within the …
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A three-dimensional coupled modes solution for range-dependent waveguides
… simple and practical tool for describing ocean acoustics in range-independent environments. Numerical implementations of wave-theory solutions for range-dependent acoustic problems can be classified as: normal-mode techniques (adiabatic or coupled modes); parabolic-approximation techniques …
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Dynamical Reduced-Order Models for High-Dimensional Systems
… videos and their dynamic compression, realistic ocean acoustics and underwater sound propagation with dynamic coordinate transforms, and stochastic reachability and time-optimal path planning. The majority of this work is devoted to new adaptive integration schemes for the DLRA. We start by …
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Understanding and utilizing waveguide invariant range-frequency striations in ocean acoustic waveguides
Much of the recent research in ocean acoustics has focused on developing methods to exploit the effects that the sea surface and seafloor have on acoustic propagation. Many of those methods require detailed knowledge of the acoustic properties of the seafloor and the sound speed profile (SSP), …
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Understanding and utilizing waveguide invariant range-frequency striations in ocean acoustic waveguides
Much of the recent research in ocean acoustics has focused on developing methods to exploit the effects that the sea surface and seafloor have on acoustic propagation. Many of those methods require detailed knowledge of the acoustic properties of the seafloor and the sound speed profile (SSP), …
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Stochastic Dynamically Orthogonal Modeling and Bayesian Learning for Underwater Acoustic Propagation
… However, the incomplete knowledge of the ocean environment and acoustic parameters makes reliable acoustic predictions challenging. This is due to the sparse and heterogeneous data, as well as to the complex ocean physics and acoustics dynamics, multiscale interactions, and large …
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Ocean acoustic applications of an autonomous underwater vehicle at the New England Shelfbreak
Oceanography is an inherently interdisciplinary field, with many interconnected processes of varying spatiotemporal scales contributing to a dynamic ocean environment. Underwater acoustics is a valuable tool for studying these oceanographic processes, as environmental variability greatly influences …