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9780735408227

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

by ; ; ;
  • ISBN13:

    9780735408227

  • ISBN10:

    073540822X

  • Format: Hardcover
  • Copyright: 2010-10-01
  • Publisher: Amer Inst of Physics

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Summary

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.

Table of Contents

Prefacep. ix
Overview Papers
Fifteen Years of U.S.-China Cooperative Research in Underwater Acoustics: 1995-2010p. 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 SW06p. 28
Sound Propagation in Shallow-Water Waveguides
Prufer Transformations for the Normal Modes in Ocean Acousticsp. 35
Accounting for Water-Column Variability in Shallow-Water Waveguide Characterizations Based on Modal Eigenvaluesp. 46
Theory and Modeling the Horizontal Refraction in Shallow Waterp. 53
The Effects of Sloping Bottoms on the Vertical Correlationp. 61
Investigation of Interference Phenomena of Broadband Acoustic Vector Signals in Shallow Waterp. 69
Gaussian Beam Tracing for Ocean Acousticsp. 81
Coupled Mode Modeling of 3-D Propagation and Scattering around Conical Seamountp. 89
Transport Theory for Shallow Water Propagation with Rough Boundariesp. 99
Extension of Coupled-Modes Method to Waveguides with Elastic Bottomp. 106
Temporal Coherence of Normal Modes in an Ocean Waveguidep. 115
Shallow-Water Waveguide Boundaries
Wave Propagation in Water-Saturated Sand and Grain Contact Physicsp. 125
Observations of 0th Order Head Waves in the Yellow Seap. 133
Seabed Attenuation in Water Saturated Sands on New Jersey Continental Shelf in 50-3000 Hz Bandsp. 140
Data-Model Comparisons for Sea Surface Waves from the ASIAEX East China Sea Experimentp. 149
Physical Parameters for Four Seabed Geoacoustic Models from Low-Frequency Measurementsp. 163
Internal Waves and Water Column Effects
Experimental Observations of Internal Wave Influence on Acoustic Propagation in Shallow Waterp. 173
Nonlinear Internal Wave Behavior Near the South of Hai-Nan Island and Simulating the Effect on Acoustic Propagationp. 183
Effect of Tidal Internal Wave Fields on Shallow Water Acoustic Propagationp. 191
Sound Velocity Fluctuation Due to Linear Internal Waves in North Yellow Seap. 199
The Effects of Internal Waves on the Signal Temporal Correlation Length in the South China Seap. 204
Geoacoustic Inversion
Geoacoustic Doppler Spectroscopy: A Novel Acoustic Technique for Surveying the Seabedp. 212
Geoacoustic Inversion in a Spatially and Temporally Variable Shallow Water Environmentp. 219
Estimating Marine Sediment Properties in a Temporally Varying Water Column Environmentp. 226
Geoacoustic Inversion Using Shallow Water Ambient Noise and Analysis of Uncertaintyp. 234
Bottom Parameters Inversion Research Based Tow-Ship Noisep. 242
Matched-Field Geoacoustic Inversion by Inverting Ship-Noise Datap. 247
Long-Range Sediment Tomography in the East China Seap. 255
Acoustic Remote Sensing of the Seabed Using Ambient Noisep. 262
Seabed Geoacoustic Inversion from Long-Range Broadband Sound Propagation in the Yellow Seap. 270
An Inversion Method of Geoacoustic Properties Based on Towed Tilted Line Array in Shallow Waterp. 278
Sound Speed Profiles Inversion in Shallow Water Using a Parallel Genetic Algorithmp. 286
Reverberation and Scattering
Study on Geoacoustics Interface Wave Scattering Characteristicp. 294
Coherent Reverberation Model Based on Adiabatic Normal Mode Theory in a Range Dependent Shallow Water Environmentp. 300
Low-Frequency Volume Reverberation Measurements in Turbid Seawaterp. 308
Shallow Water Reverberation Model Based on Bottom Reflection Parametersp. 314
T-Matrix Formulation of Scattering by an Obstacle Near a Planar Sediment Boundary and Application to Detection Using Iterative Time Reversalp. 323
Signal Processing, Engineering and Applications
Adaptive Bubble Pulse Cancellation and Its Applicationsp. 331
Signal Recovery Technique Based on a Physical Method of Underwater Acousticsp. 339
Studies of the Characteristics of a Densely-Coupled Array of Underwater Acoustic Transmitting Transducersp. 345
Statistical Estimation of Source Location in Presence of Geoacoustic Inversion Uncertaintyp. 353
An Improved Passive Phase Conjugation Array Communication Algorithmp. 360
Joint Time-Reversal Processing and Spatial Diversity for Distributed Target Detection in Shallow Waterp. 367
Sonar Detection Range Index Estimation Approach in Uncertain Environmentsp. 375
Analysis on Sound Field Recorded with Vector Sensorsp. 383
Inversion of Ocean Environmental Variations via Time Reversal Acousticsp. 390
Underwater Time Service and Synchronization Based on Time Reversal Techniquep. 397
Single-Mode Closed-Loop Excitation in Shallow Water Using Two Vertical Hydrophone Arraysp. 405
Target Detection by Receiving-Transmitting-United MVDR TRBF under Environmental Mismatchp. 411
An Experiment on Passive Synthetic Aperture Time Reversal Communications in Shallow Waterp. 420
Extraction of the Waveguide Invariant from a Shallow-Water Acoustical Experimentp. 425
A Robust Separating and Tracking Method on Two Wideband Sources by Subspace Rotation with One Vector Hydrophonep. 431
A Design of Direct-Sequence Spread-Spectrum Acoustic Communication Systemp. 439
A Design of Direct-Sequence Spread-Spectrum Acoustic Communication Systemp. 439
Active Matched Field Localization by a Horizontal Receiving Arrayp. 447
Improvement of Longitudinal Correlation of Explosive Signals by Using Waveguide Invariancep. 454
Uncertain Acoustic Field Modeling and Robust Source Localization in Shallow Waterp. 462
Author Indexp. 471
Table of Contents provided by Ingram. All Rights Reserved.

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