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 7 of 7 for “"Single-hydrophone"”.
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Application of the Method of Least Squares to a Solution of the Matched Field Localization Problem with a Single Hydrophone
The single hydrophone localization problem is considered. Single hydrophone localization is a special case of matched field localization where measurements from only one hydrophone are available. The time series of the pressure at the hydrophone is compared with predicted times series calculated …
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Remote estimation of aquatic sediment density in the presence of scatter.
… kHz omnidirectional source are collected using a single hydrophone directly above the source. An empirical relationship is then used to estimate the sediment density from the normal incidence reflections. Due to the high frequency source and centimeter scale inhomogeneities in the sediment, a …
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Localization of acoustic transients in shallow water environments
… from all possible source location to a single hydrophone. This program predicts the signal as it would appear at the receiver from a grid of possible source locations. Second, source localization results from finding the maximum correlation between the positionally dependent, numerical …
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Signal Absorption-Based Range Estimator for Undersea Swarms
… and communications structure. We propose a single vehicle with reliable navigation as a "leader" for a scalable swarm of lower-cost vehicles that receive signals via a single hydrophone. This thesis outlines range estimation methods for sources with known signal content, including frequency …
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Deep learning framework for solving geoacoustic inversion problems using normal mode theory
… end-to-end system is developed for use with a single hydrophone. This system detects impulsive acoustic events, locates the source, and inverts key geoacoustic parameters, including sediment sound speed, density, and layer thickness. Validation using data from the 2022 Seabed Characterization …
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Understanding and utilizing waveguide invariant range-frequency striations in ocean acoustic waveguides
… striations can be observed using a single hydrophone or a horizontal line array (HLA) of hydrophones. This thesis shows that traditional array processing techniques are sometimes inadequate for the purpose of observing range-frequency striations using a HLA. Array processing …
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Understanding and utilizing waveguide invariant range-frequency striations in ocean acoustic waveguides
… striations can be observed using a single hydrophone or a horizontal line array (HLA) of hydrophones. This thesis shows that traditional array processing techniques are sometimes inadequate for the purpose of observing range-frequency striations using a HLA. Array processing …