Bottom-Interacting Ocean Acoustics

Front Matter....Pages i-xi
Attenuation of Sound in Marine Sediments....Pages 1-13
Directivity and Radiation Impedance of a Transducer Embedded in a Lossy Medium....Pages 15-39
Elastic Properties Related to Depth of Burial, Strontium Content and Age, and Diagenetic Stage in Pelagic Carbonate Sediments....Pages 41-51
Application of Geophysical Methods and Equipment to Explore the Sea Bottom....Pages 53-71
The Acoustic Response of Some Gas-Charged Sediments in the Northern Adriatic Sea....Pages 73-84
Simultaneous Application of Reflection Strength Recorder, Sidescan Sonar and Sub-Bottom Profiler in Seafloor Sediment Mapping....Pages 85-98
Results and Methods Used to Determine the Acoustic Properties of the Southeast Asian Margins....Pages 99-109
Circular Structures Observed in the Deep Sea by the Swathmap Long-Range Sidescan Sonar....Pages 111-117
A Perspective on Bottom Reflectivity and Backscattering....Pages 119-134
Some Bottom-Reflection Loss Anomalies near Grazing and Their Effect on Propagation in Shallow Water....Pages 135-152
Determination of Sediment Sound Speed Profiles Using Caustic Range Information....Pages 153-157
Inference of Geo-Acoustic Parameters from Bottom-Loss Data....Pages 159-171
Attenuation Estimates from High Resolution Subbottom Profiler Echoes....Pages 173-191
Low Frequency Bottom Reflectivity Measurements in the Tufts Abyssal Plain....Pages 193-207
Resonances in Acoustic Bottom Reflection and Their Relation to the Ocean Bottom Properties....Pages 209-223
Comparison of Synthetic and Experimental Bottom Interactive Waveforms....Pages 225-237
Reflection and Refraction of Parametrically Generated Sound at a Water-Sediment Interface....Pages 239-258
Transmission of a Narrow Beam of Sound across the Boundary between Two Fluids....Pages 259-284
Experimental Determination of Properties of the Scholte Wave in the Bottom of the North Sea....Pages 285-298
Model Computations for Low-Velocity Surface Waves on Marine Sediments....Pages 299-305
Experimental and Theoretical Studies of Seismic Interface Waves in Coastal Waters....Pages 307-327
Ambient and Ship-Induced Low-Frequency Noise in Shallow Water....Pages 329-343
Dispersion of One-Second Rayleigh Modes through Oceanic Sediments Following Shallow Earthquakes in the South-Central Pacific Ocean Basin....Pages 345-358
Velocity Spectral Estimates from the Arrays of the ROSE Program....Pages 359-376
Bottom Interaction Represented by Impedance Conditions in Normal-Mode Calculations....Pages 377-391
Cycle Distance in Guided Propagation....Pages 393-398
Computation of Averaged Sound-Propagation Losses and Frequency/Space Coherence Functions in Shallow Waters....Pages 399-415
Initial Data for the Parabolic Equation....Pages 417-420
The Seamount as a Diffracting Body....Pages 421-438
Propagation of Sound from a Fluid Wedge into a Fast Fluid Bottom....Pages 439-450
Range-Dependent Bottom-Limited Propagation Modelling with the Parabolic Equation....Pages 451-466
A Low-Frequency Parametric Research Tool for Ocean Acoustics....Pages 467-483
Transmission Loss Variability in Shallow Water....Pages 485-492
Influence of Semiconsolidated Sediments on Sound Propagation in a Coastal Region....Pages 493-505
Geoacoustic Models of the Seabed to Support Range-Dependent Propagation Studies on the Scotian Shelf....Pages 507-523
Propagation Loss Modelling on the Scotian Shelf: The Geo-Acoustic Model....Pages 525-539
Propagation Loss Modelling on the Scotian Shelf: Comparison of Model Predictions with Measurements....Pages 541-555
Sea Floor Effects on Shallow-Water Acoustic Propagation....Pages 557-575
Broadband Model/Data Comparisons for Acoustic Propagation in Coastal Waters....Pages 577-592
Computer Model Predictions of Ocean Basin Reverberation for Large Underwater Explosions....Pages 593-607
Fluctuation Statistics of Sea-Bed Acoustic Backscatter....Pages 609-622
Measurements of Spatial Coherence of Bottom-Interacting Sound in the Tagus Abyssal Plain....Pages 623-641
Effects of Medium Fluctuations on Underwater Acoustic Transmissions in a Shallow Water Area....Pages 643-657
Analysis of Time-Varying Spatially-Varying Sound-Propagation Systems....Pages 659-676
Phase-Coherence in a Shallow Water Waveguide....Pages 677-689
The Influence of Unknown Bottom Parameters on Bearing Estimation in Shallow Water....Pages 691-700
Back Matter....Pages 701-717