Search Results - "Knobles, David P"

Transdimensional Inversion on the New England Mud Patch Using High-Order Modes by Bonnel, Julien, Dosso, Stan E., Knobles, David P., Wilson, Preston S.

“…This article presents geoacoustic inversion results for modal-dispersion data collected during the 2017 Seabed Characterization Experiment on the New England…”
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Evidence of three-dimensional acoustic propagation in the Catoche Tongue by Sagers, Jason D, Ballard, Megan S, Knobles, David P

“…This paper presents observations of two classes of acoustic arrivals recorded on a sparsely populated vertical line array (VLA) moored in the center of the…”
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Acoustic ducting by shelf water streamers at the New England shelfbreak by Johnson, Jennifer J, Lin, Ying-Tsong, Newhall, Arthur E, Gawarkiewicz, Glen G, Knobles, David P, Chaytor, Jason D, Hodgkiss, William S

“…Greater sound speed variability has been observed at the New England shelfbreak due to a greater influence from the Gulf Stream with increased meander…”
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Guest Editorial An Overview of the Seabed Characterization Experiment by Wilson, Preston S., Knobles, David P., Neilsen, Tracianne B.

“…A broad overview of the field work conducted during the SBCEX has been provided. SBCEX included a comprehensive subbottom chirp profile of the experimental…”
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Seabed and range estimation of impulsive time series using a convolutional neural network by Van Komen, David F., Neilsen, Tracianne B., Howarth, Kira, Knobles, David P., Dahl, Peter H.

“…In ocean acoustics, many types of optimizations have been employed to locate acoustic sources and estimate the properties of the seabed. How these tasks can…”
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The Airy phase of explosive sounds in shallow water by Wan, Lin, Badiey, Mohsen, Knobles, David P., Wilson, Preston S.

“…The Airy phase is identified in the received signals from explosive charges deployed in a shallow water acoustic experiment conducted in the New England…”
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Geoacoustic inversion using low frequency broadband acoustic measurements from L-shaped arrays in the Shallow Water 2006 Experiment by Wan, Lin, Badiey, Mohsen, Knobles, David P.

“…When using geoacoustic inversion methods, one objective function may not result in a unique solution of the inversion problem because of the ambiguity among…”
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Ship-of-Opportunity Noise Inversions for Geoacoustic Profiles of a Layered Mud-Sand Seabed by Tollefsen, Dag, Dosso, Stan E., Knobles, David P.

“…This paper considers the use of broadband noise from a ship-of-opportunity in statistical inference for estimating geoacoustic parameters of a layered mud-sand…”
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Guest Editorial: Continued Exploration of Fine-Grained Sediments from SBCEX2017 by Wilson, Preston S., Knobles, David P., Neilsen, Tracianne B.

“…The papers in this special section focus on the exploration of fine-grained sediments that were collected from the Seabed Characterization Experiment in 2017…”
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Seabed type and source parameters predictions using ship spectrograms in convolutional neural networks by Van Komen, David F, Neilsen, Tracianne B, Mortenson, Daniel B, Acree, Mason C, Knobles, David P, Badiey, Mohsen, Hodgkiss, William S

“…Broadband spectrograms from surface ships are employed in convolutional neural networks (CNNs) to predict the seabed type, ship speed, and closest point of…”
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Broadband Waveform Geoacoustic Inversions With Absolute Travel Time by Lin, Ying-Tsong, Bonnel, Julien, Knobles, David P., Wilson, Preston S.

“…Numerical and experimental studies were conducted to investigate the advantage of utilizing absolute travel time information in Bayesian geoacoustic inversions…”
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Maximum Entropy Derived Statistics of Sound-Speed Structure in a Fine-Grained Sediment Inferred From Sparse Broadband Acoustic Measurements on the New England Continental Shelf by Knobles, David P., Wilson, Preston S., Goff, John A., Wan, Lin, Buckingham, Michael J., Chaytor, Jason D., Badiey, Mohsen

“…Marginal probability distributions for parameters representing an effective sound-speed structure of a fine-grained sediment are inferred from a data ensemble…”
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Estimates of Low-Frequency Sound Speed and Attenuation in a Surface Mud Layer Using Low-Order Modes by Wan, Lin, Badiey, Mohsen, Knobles, David P., Wilson, Preston S., Goff, John A.

“…Whereas there have been numerous theoretical and experimental studies on the properties of marine granular sands, there are significantly fewer studies on…”
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Seabed classification from merchant ship-radiated noise using a physics-based ensemble of deep learning algorithms by Escobar-Amado, Christian D., Neilsen, Tracianne B., Castro-Correa, Jhon A., Van Komen, David F., Badiey, Mohsen, Knobles, David P., Hodgkiss, William S.

“…Merchant ship-radiated noise, recorded on a single receiver in the 360–1100 Hz frequency band over 20 min, is employed for seabed classification using an…”
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Estimation of Frequency-Wavenumber Diagrams Using a Physics-Based Grid-Free Compressed Sensing Method by Paviet-Salomon, Thomas, Bonnel, Julien, Dorffer, Clement, Nicolas, Barbara, Chonavel, Thierry, Tollefsen, Dag, Knobles, David P., Wilson, Preston S., Dremeau, Angelique

“…Shallow water propagation can be described using modal theory. For low frequency sources, propagated signals are composed of a few dispersive modes, each of…”
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Short-Range Signatures of Explosive Sounds in Shallow Water Used for Seabed Characterization by Wilson, Preston S., Knobles, David P., Dahl, Peter H., McNeese, Andrew R., Zeh, Matthew C.

“…Small explosions were used as sound sources in the Seabed Characterization Experiment conducted in spring 2017 in the New England Mud Patch, a shallow-water…”
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Transdimensional Geoacoustic Inversion Using Prior Information on Range-Dependent Seabed Layering by Bonnel, Julien, Dosso, Stan E., Goff, John A., Lin, Ying-Tsong, Miller, James H., Potty, Gopu R., Wilson, Preston S., Knobles, David P.

“…This article proposes a transdimensional (trans-D) geoacoustic inversion method adapted to range-dependent (RD) propagation tracks based on prior information…”
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Statistical inference of seabed sound-speed structure in the Gulf of Oman Basin by Sagers, Jason D, Knobles, David P

“…Addressed is the statistical inference of the sound-speed depth profile of a thick soft seabed from broadband sound propagation data recorded in the Gulf of…”
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Validating deep learning seabed classification via acoustic similarity by Forman, David J., Neilsen, Tracianne B., Van Komen, David F., Knobles, David P.

“…While seabed characterization methods have often focused on estimating individual sediment parameters, deep learning suggests a class-based approach focusing…”
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An impulsive source with variable output and stable bandwidth for underwater acoustic experiments by McNeese, Andrew R, Wilson, Preston S, Sagers, Jason D, Knobles, David P

“…The Combustive Sound Source (CSS) is being developed as an environmentally friendly source to be used in ocean acoustics research and surveys. It has the…”
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