Shallow-Water Acoustics: Proceedings of the Second International Shallow-water Acoustics Conference (SWAC'09) Shanghai, China 16-20 September 2009

, by Simmen, Jeffrey; Livingston, Ellen S.; Zhou, Ji-Xun; Li, Feng-Hua

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ISBN: 9780735408227 | 073540822X
Cover: Hardcover
Copyright: 10/1/2010

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Undersea acoustic applications in shallow water, to detect, communicate, navigate, monitor and measure, are dependent upon a good physical understanding of sound propagation and scattering in this highly dynamic and inhomogeneous waveguide. Achieving such an understanding requires an interdisciplinary approach encompassing acoustics, physical oceanography, marine geophysics, marine biology, ocean engineering, and signal processing, as well as the underlying physics and mathematics of the integrated theory.

Preface	p. ix
Overview Papers
Fifteen Years of U.S.-China Cooperative Research in Underwater Acoustics: 1995-2010	p. 1
Finite-Element Modeling in Ocean Acoustics: Where are We Heading?	p. 11
Nonlinear Internal Wave Interactions with Low Frequency Shallow Water Sound-What is Left to Do?	p. 23
Mid-Frequency Acoustics in SW06	p. 28
Sound Propagation in Shallow-Water Waveguides
Prufer Transformations for the Normal Modes in Ocean Acoustics	p. 35
Accounting for Water-Column Variability in Shallow-Water Waveguide Characterizations Based on Modal Eigenvalues	p. 46
Theory and Modeling the Horizontal Refraction in Shallow Water	p. 53
The Effects of Sloping Bottoms on the Vertical Correlation	p. 61
Investigation of Interference Phenomena of Broadband Acoustic Vector Signals in Shallow Water	p. 69
Gaussian Beam Tracing for Ocean Acoustics	p. 81
Coupled Mode Modeling of 3-D Propagation and Scattering around Conical Seamount	p. 89
Transport Theory for Shallow Water Propagation with Rough Boundaries	p. 99
Extension of Coupled-Modes Method to Waveguides with Elastic Bottom	p. 106
Temporal Coherence of Normal Modes in an Ocean Waveguide	p. 115
Shallow-Water Waveguide Boundaries
Wave Propagation in Water-Saturated Sand and Grain Contact Physics	p. 125
Observations of 0th Order Head Waves in the Yellow Sea	p. 133
Seabed Attenuation in Water Saturated Sands on New Jersey Continental Shelf in 50-3000 Hz Bands	p. 140
Data-Model Comparisons for Sea Surface Waves from the ASIAEX East China Sea Experiment	p. 149
Physical Parameters for Four Seabed Geoacoustic Models from Low-Frequency Measurements	p. 163
Internal Waves and Water Column Effects
Experimental Observations of Internal Wave Influence on Acoustic Propagation in Shallow Water	p. 173
Nonlinear Internal Wave Behavior Near the South of Hai-Nan Island and Simulating the Effect on Acoustic Propagation	p. 183
Effect of Tidal Internal Wave Fields on Shallow Water Acoustic Propagation	p. 191
Sound Velocity Fluctuation Due to Linear Internal Waves in North Yellow Sea	p. 199
The Effects of Internal Waves on the Signal Temporal Correlation Length in the South China Sea	p. 204
Geoacoustic Inversion
Geoacoustic Doppler Spectroscopy: A Novel Acoustic Technique for Surveying the Seabed	p. 212
Geoacoustic Inversion in a Spatially and Temporally Variable Shallow Water Environment	p. 219
Estimating Marine Sediment Properties in a Temporally Varying Water Column Environment	p. 226
Geoacoustic Inversion Using Shallow Water Ambient Noise and Analysis of Uncertainty	p. 234
Bottom Parameters Inversion Research Based Tow-Ship Noise	p. 242
Matched-Field Geoacoustic Inversion by Inverting Ship-Noise Data	p. 247
Long-Range Sediment Tomography in the East China Sea	p. 255
Acoustic Remote Sensing of the Seabed Using Ambient Noise	p. 262
Seabed Geoacoustic Inversion from Long-Range Broadband Sound Propagation in the Yellow Sea	p. 270
An Inversion Method of Geoacoustic Properties Based on Towed Tilted Line Array in Shallow Water	p. 278
Sound Speed Profiles Inversion in Shallow Water Using a Parallel Genetic Algorithm	p. 286
Reverberation and Scattering
Study on Geoacoustics Interface Wave Scattering Characteristic	p. 294
Coherent Reverberation Model Based on Adiabatic Normal Mode Theory in a Range Dependent Shallow Water Environment	p. 300
Low-Frequency Volume Reverberation Measurements in Turbid Seawater	p. 308
Shallow Water Reverberation Model Based on Bottom Reflection Parameters	p. 314
T-Matrix Formulation of Scattering by an Obstacle Near a Planar Sediment Boundary and Application to Detection Using Iterative Time Reversal	p. 323
Signal Processing, Engineering and Applications
Adaptive Bubble Pulse Cancellation and Its Applications	p. 331
Signal Recovery Technique Based on a Physical Method of Underwater Acoustics	p. 339
Studies of the Characteristics of a Densely-Coupled Array of Underwater Acoustic Transmitting Transducers	p. 345
Statistical Estimation of Source Location in Presence of Geoacoustic Inversion Uncertainty	p. 353
An Improved Passive Phase Conjugation Array Communication Algorithm	p. 360
Joint Time-Reversal Processing and Spatial Diversity for Distributed Target Detection in Shallow Water	p. 367
Sonar Detection Range Index Estimation Approach in Uncertain Environments	p. 375
Analysis on Sound Field Recorded with Vector Sensors	p. 383
Inversion of Ocean Environmental Variations via Time Reversal Acoustics	p. 390
Underwater Time Service and Synchronization Based on Time Reversal Technique	p. 397
Single-Mode Closed-Loop Excitation in Shallow Water Using Two Vertical Hydrophone Arrays	p. 405
Target Detection by Receiving-Transmitting-United MVDR TRBF under Environmental Mismatch	p. 411
An Experiment on Passive Synthetic Aperture Time Reversal Communications in Shallow Water	p. 420
Extraction of the Waveguide Invariant from a Shallow-Water Acoustical Experiment	p. 425
A Robust Separating and Tracking Method on Two Wideband Sources by Subspace Rotation with One Vector Hydrophone	p. 431
A Design of Direct-Sequence Spread-Spectrum Acoustic Communication System	p. 439
A Design of Direct-Sequence Spread-Spectrum Acoustic Communication System	p. 439
Active Matched Field Localization by a Horizontal Receiving Array	p. 447
Improvement of Longitudinal Correlation of Explosive Signals by Using Waveguide Invariance	p. 454
Uncertain Acoustic Field Modeling and Robust Source Localization in Shallow Water	p. 462
Author Index	p. 471
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Shallow-Water Acoustics: Proceedings of the Second International Shallow-water Acoustics Conference (SWAC'09) Shanghai, China 16-20 September 2009

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