Acoustic Sensing Techniques for the Shallow Water Environment: Inversion Methods and ExperimentsAndrea Caiti, N. Ross Chapman, Jean-Pierre Hermand, Sérgio M. Jesus This volume contains the collection of papers from the second workshop on Experimental Acoustic Inversion Techniques for Exploration of the Shallow Water Environment. Acoustic techniques provide the most effective means for remote sensing of ocean and sea floor processes, and for probing the structure beneath the sea floor. No other energy propagates as efficiently in the ocean: radio waves and visible light are severely limited in range because the ocean is a highly conductive medium. However, sound from breaking waves and coastal shipping can be heard throughout the ocean, and marine mammals communicate acoustically over basin scale distances. The papers in this book indicate a high level of research interest that has generated significant progress in development and application of experimental acoustic inversion techniques. The applications span a broad scope in geosciences, from geophysical, biological and even geochemical research. The list includes: estimation of geotechnical properties of sea bed materials; navigation and mapping of the sea floor; fisheries, aquaculture and sea bed habitat assessment; monitoring of marine mammals; sediment transport; and investigation of natural geohazards in marine sediments. Audience This book is primarily intended for physicists and engineers working in underwater acoustics and oceanic engineering. It will also be of interest to marine biologists, geophysicists and oceanographers as potential users of the methodologies and techniques described in the book contributions. |
Contents
Bayesian inversion of seabed reflection data 17 | 16 |
time reversal retrogation | 29 |
and 1 Matthias Meyer and JeanPierre Hermand 3 | 47 |
Dispersion of broadband acoustic normal modes in the context of long range | 56 |
Gopu Potty and James Miller | 73 |
Nielsen Mark Fallat and Christopher Harrison | 87 |
Accounting for bias in horizontal wavenumber estimates due to source motion | 99 |
Acoustic clutter from buried submarine mud volcanoes | 109 |
Continuous acoustic monitoring of physiological and environmental processes | 183 |
Shallow water tomography in a highly variable scenario | 197 |
Inversions of reflection loss measurements of a smooth watersand interface 213 | 212 |
Estimation of transmission loss and its uncertainty | 233 |
A forward model for geoacoustic inversion based on ray tracing and planewave | 241 |
Inversion of the propeller harmonics from a light aircraft for the geoacoustic | 256 |
Inversion of shallow water ambient noise data by means of differential evolution | 265 |
Reflection loss and subbottom profiling with ambient noise Chris Harrison 281 | 280 |
Charles W Holland Anthony L Gerig and Piero Boni | 125 |
Jarosław Tgowski Zygmunt Klusek and Jaromir Jakacki | 147 |
Ilkka Karasalo and Patrik Skogqvist | 154 |
A sediment probe for the rapid assessment of seabed characteristics | 171 |
Inversion of geoacoustic model parameters using ship radiated noise | 289 |
Matchedfield processing of humpback whale song off eastern Australia | 303 |
Dag Tollefsen Michael J Wilmut and Ross Chapman | 321 |