Spatial Coherence In A Shallow Water Waveguide

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Fundamentals of Shallow Water Acoustics

Author : Boris Katsnelson
Publisher : Springer Science & Business Media
ISBN 13 : 1441997768
Total Pages : 549 pages
Book Rating : 4.4/5 (419 download)

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Book Synopsis Fundamentals of Shallow Water Acoustics by : Boris Katsnelson

Download or read book Fundamentals of Shallow Water Acoustics written by Boris Katsnelson and published by Springer Science & Business Media. This book was released on 2012-02-22 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shallow water acoustics (SWA), the study of how low and medium frequency sound propagates and scatters on the continental shelves of the worlds oceans, has both technical interest and a large number of practical applications. Technically, shallow water poses an interesting medium for the study of acoustic scattering, inverse theory, and propagation physics in a complicated oceanic waveguide. Practically, shallow water acoustics has interest for geophysical exploration, marine mammal studies, and naval applications. Additionally, one notes the very interdisciplinary nature of shallow water acoustics, including acoustical physics, physical oceanography, marine geology, and marine biology. In this specialized volume the authors, all of whom have extensive at-sea experience in US and Russian research efforts, have tried to summarize the main experimental, theoretical, and computational results in shallow water acoustics, with an emphasis on providing physical insight into the topics presented.

Ocean Seismo-Acoustics

Author : T. Akal
Publisher : Springer Science & Business Media
ISBN 13 : 1461322014
Total Pages : 898 pages
Book Rating : 4.4/5 (613 download)

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Book Synopsis Ocean Seismo-Acoustics by : T. Akal

Download or read book Ocean Seismo-Acoustics written by T. Akal and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 898 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seafloor investigation has long been a feature of not only seismology but also of acoustics. Indeed it was acoustics that produced depth sounders, giving us the first capability of producing both global and local maps of the seafloor. Subsequently, better instrumentation and techniques led to a clearer, more quantitative picture of the seabed itself, which stimulated new hypotheses such as seafloor spreading through the availability of more reliable data on sediment thickness over ocean basins and other bottom features. Geologists and geophysicists have used both acoustic and seismic methods to study the seabed by considering the propagation of signals arising from both natural seismic events and man-made impulsive sources. Although significant advances have been made in instrumentation, such as long towed geophysical arrays, ai r guns and ocean bot tom seismometers, the pic ture of the seafloor is still far from complete. Underwater acoustics concerns itself today with the phenomena of propagation and noise at frequencies and ranges that require an understanding of acoustic interaction at both of its boundaries, the sea surface and seafloor, over depths ranging from tens to thousands of meters. Much of the earlier higher frequency (>1 kHz) work included the characterization of the seafloor in regimes of reflection coefficients which were empirically derived from surveys. The results of these studies met with only limited success, confined as they were to those areas where survey data existed and lacking a physical understanding of the processes of reflection and scattering.

Acoustic Sensing Techniques for the Shallow Water Environment

Author : Andrea Caiti
Publisher : Springer Science & Business Media
ISBN 13 : 1402043864
Total Pages : 331 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Acoustic Sensing Techniques for the Shallow Water Environment by : Andrea Caiti

Download or read book Acoustic Sensing Techniques for the Shallow Water Environment written by Andrea Caiti and published by Springer Science & Business Media. This book was released on 2006-09-21 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Theoretical and Computational Acoustics 2003

Author : Dr. Alexandra Tolstoy
Publisher : World Scientific
ISBN 13 : 9812389210
Total Pages : 493 pages
Book Rating : 4.8/5 (123 download)

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Book Synopsis Theoretical and Computational Acoustics 2003 by : Dr. Alexandra Tolstoy

Download or read book Theoretical and Computational Acoustics 2003 written by Dr. Alexandra Tolstoy and published by World Scientific. This book was released on 2004 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ICTCA conference provides an interdisciplinary forum for active researchers in academia and industry who are of varying backgrounds to discuss the state-of-the-art developments and results in theoretical and computational acoustics and related topics. The papers presented at the meeting cover acoustical problems of common interest across disciplines and their accurate mathematical and numerical modeling.This volume collects papers that were presented at the sixth meeting. The subjects include geophysics, scattering and diffraction, the parabolic equation (with special sessions in honor of Dr Fred Tappert), seismic exploration, boundary element methods, visualization, oil industry applications, shallow water acoustics, matched field tracking, bubbles, waves in complex media, seabed interactions, ocean acoustic inversion, and mathematical issues in underwater acoustics.

Bottom-Interacting Ocean Acoustics

Author : William A. Kuperman
Publisher : Springer Science & Business Media
ISBN 13 : 1468490516
Total Pages : 700 pages
Book Rating : 4.4/5 (684 download)

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Book Synopsis Bottom-Interacting Ocean Acoustics by : William A. Kuperman

Download or read book Bottom-Interacting Ocean Acoustics written by William A. Kuperman and published by Springer Science & Business Media. This book was released on 2013-03-13 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: vi These categories seem to represent the basic breakdown by field of present-day research in this area. Though each paper has been classified into one of these categories (for conference organization purpose), many papers overlapped two or three areas. It is also interesting to note that not only are scientific results being communicated, but the latest techniques and the state-of-the-art tools of the trade (existing and in development) are also being presented. The forty-six papers presented at this conference represent the work of seventy scientists working at universities, government laboratories, and industrial laboratories in seven different countries . We would like to thank the contributors for their efforts and especially for their promptness in providing the editors with their final manuscripts. William A. Kuperman Finn B. Jensen La Spezia, Italy July 1980 CONTENTS GEOACOUSTIC PROPERTIES OF MARINE SEDIMENTS Attenuation of Sound in Marine Sediments . • 1 J. M. Hovem Directivity and Radiation Impedance of a Transducer 15 Embedded in a Lossy Medium . •• •••••• G. H. Ziehm Elastic Properties Related to Depth of Burial, Strontium Content and Age, and Diagenetic Stage in Pelagic Carbonate Sediments . . • • . • • • . 41 M. H. Manghnani, S. O. Schianger, and P. D. Milholland Application of Geophysical Methods 'and Equipment to Explore the Sea Bottom . •• •••. • 53 H. F. Weichart The Acoustic Response of Some Gas-Charged Sediments in the Northern Adriatic Sea • • • • . • • • • 73 A.

Full Field Inversion Methods in Ocean and Seismo-Acoustics

Author : Orest Diachok
Publisher : Springer Science & Business Media
ISBN 13 : 9401584761
Total Pages : 424 pages
Book Rating : 4.4/5 (15 download)

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Book Synopsis Full Field Inversion Methods in Ocean and Seismo-Acoustics by : Orest Diachok

Download or read book Full Field Inversion Methods in Ocean and Seismo-Acoustics written by Orest Diachok and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in the power of inversion methods, the accuracy of acoustic field prediction codes, and the speed of digital computers have made the full field inversion of ocean and seismic parameters on a large scale a practical possibility. These methods exploit amplitude and phase information detected on hydrophone/geophone arrays, thereby extending traditional inversion schemes based on time of flight measurements. Full field inversion methods provide environmental information by minimising the mismatch between measured and predicted acoustic fields through a global search of possible environmental parameters. Full Field Inversion Methods in Ocean and Seismo-Acoustics is the formal record of a conference held in Italy in June 1994, sponsored by NATO SACLANT Undersea Research Centre. It includes papers by NATO specialists and others. Topics covered include: · speed and accuracy of acoustic field prediction codes · signal processing strategies · global inversion algorithms · search spaces of environmental parameters · environmental stochastic limitations · special purpose computer architectures · measurement geometries · source and receiving sensor technologies.

Applied Mechanics Reviews

Author :
Publisher :
ISBN 13 :
Total Pages : 1052 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Applied Mechanics Reviews by :

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1985 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Journal of the Acoustical Society of America

Author : Acoustical Society of America
Publisher :
ISBN 13 :
Total Pages : 1552 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis The Journal of the Acoustical Society of America by : Acoustical Society of America

Download or read book The Journal of the Acoustical Society of America written by Acoustical Society of America and published by . This book was released on 2007 with total page 1552 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Shallow Water Acoustics

Author : Boris G. Katsnelson
Publisher : Springer Science & Business Media
ISBN 13 : 9783540426448
Total Pages : 296 pages
Book Rating : 4.4/5 (264 download)

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Book Synopsis Shallow Water Acoustics by : Boris G. Katsnelson

Download or read book Shallow Water Acoustics written by Boris G. Katsnelson and published by Springer Science & Business Media. This book was released on 2002-05-01 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this book is to present the main theoretical approaches and models in shallow water acoustics as well as different experimental results. The focus is primarily concentrated on physical results describing the sound field in wave length. The authors show dynamic phenomena (tides, internal waves) from the perspective of acoustic influence as well as the scattering of sound over the macroscopic body in shallow water waveguide. The method of acoustic probing can be used by physicists, geophysicists, geologists and oceanographers.

Report on the Office of Naval Research USA-China Conference on Shallow Water Acoustics, December 18-21, 1995

Author : Ching-Sang Chiu
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Report on the Office of Naval Research USA-China Conference on Shallow Water Acoustics, December 18-21, 1995 by : Ching-Sang Chiu

Download or read book Report on the Office of Naval Research USA-China Conference on Shallow Water Acoustics, December 18-21, 1995 written by Ching-Sang Chiu and published by . This book was released on 1997 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A History of the Acoustics Division of the Naval Research Laboratory

Author : Fred Tudor Erskine
Publisher :
ISBN 13 :
Total Pages : 188 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis A History of the Acoustics Division of the Naval Research Laboratory by : Fred Tudor Erskine

Download or read book A History of the Acoustics Division of the Naval Research Laboratory written by Fred Tudor Erskine and published by . This book was released on 2013 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ocean observation based on underwater acoustic technology

Author : Xuebo Zhang
Publisher : Frontiers Media SA
ISBN 13 : 2832528740
Total Pages : 281 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Ocean observation based on underwater acoustic technology by : Xuebo Zhang

Download or read book Ocean observation based on underwater acoustic technology written by Xuebo Zhang and published by Frontiers Media SA. This book was released on 2023-07-04 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Underwater Acoustic Modeling and Simulation

Author : Paul C. Etter
Publisher : CRC Press
ISBN 13 : 1351831984
Total Pages : 557 pages
Book Rating : 4.3/5 (518 download)

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Book Synopsis Underwater Acoustic Modeling and Simulation by : Paul C. Etter

Download or read book Underwater Acoustic Modeling and Simulation written by Paul C. Etter and published by CRC Press. This book was released on 2017-12-19 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underwater Acoustic Modeling and Simulation, Fourth Edition continues to provide the most authoritative overview of currently available propagation, noise, reverberation, and sonar-performance models. This fourth edition of a bestseller discusses the fundamental processes involved in simulating the performance of underwater acoustic systems and emphasizes the importance of applying the proper modeling resources to simulate the behavior of sound in virtual ocean environments. New to the Fourth Edition Extensive new material that addresses recent advances in inverse techniques and marine-mammal protection Problem sets in each chapter Updated and expanded inventories of available models Designed for readers with an understanding of underwater acoustics but who are unfamiliar with the various aspects of modeling, the book includes sufficient mathematical derivations to demonstrate model formulations and provides guidelines for selecting and using the models. Examples of each type of model illustrate model formulations, model assumptions, and algorithm efficiency. Simulation case studies are also included to demonstrate practical applications. Providing a thorough source of information on modeling resources, this book examines the translation of our physical understanding of sound in the sea into mathematical models that simulate acoustic propagation, noise, and reverberation in the ocean. The text shows how these models are used to predict and diagnose the performance of complex sonar systems operating in the undersea environment.

Impact of Littoral Environmental Variability on Acoustic Predictions and Sonar Performance

Author : Nicholas G. Pace
Publisher : Springer Science & Business Media
ISBN 13 : 9401006261
Total Pages : 592 pages
Book Rating : 4.4/5 (1 download)

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Book Synopsis Impact of Littoral Environmental Variability on Acoustic Predictions and Sonar Performance by : Nicholas G. Pace

Download or read book Impact of Littoral Environmental Variability on Acoustic Predictions and Sonar Performance written by Nicholas G. Pace and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: The limiting influence of the environment on sonar has long been recognised as a major challenge to science and technology. As the area of interest shifts towards the lit toral, environmental influences become dominant both in time and space. The manyfold challenges encompass prediction, measurement, assessment and adaptive responses to maximize the effectiveness of systems. Although MCM and ASW activities are dom inated in different ways and scales by the environment, both warfare areas have had to consider the significantly changing requirements posed by operations in the littoraL The fundamental scientific issues involved in developing models relating acoustics to the environment are matched in difficulty by the need for data for their validation and eventual practical use for prediction. In many instances the need is for on-line adaptation of systems to changing circumstances whilst other needs are for the Ionger term planning activities. This book and the attached full-color CD are the proceedings of a conference organ ised by the SACLANT Undersea Research Centre, held at Villa Marigola, Lerici, Italy, on 16-20 September 2002. The fundamental problems associated with environmental 1 variability and sonar were explored at a previous SACLANTCEN conference in 1990. These problems have not gone away but, on the one hand are exaggerated by the move to the littoral and on the other hand, are open to treatrnent in new ways that advances in technology and computer power allow.

Fundamentals of Acoustical Oceanography

Author : Herman Medwin
Publisher : Academic Press
ISBN 13 : 0080532160
Total Pages : 739 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Fundamentals of Acoustical Oceanography by : Herman Medwin

Download or read book Fundamentals of Acoustical Oceanography written by Herman Medwin and published by Academic Press. This book was released on 1997-11-05 with total page 739 pages. Available in PDF, EPUB and Kindle. Book excerpt: The developments in the field of ocean acoustics over recent years make this book an important reference for specialists in acoustics, oceanography, marine biology, and related fields. Fundamentals of Acoustical Oceanography also encourages a new generation of scientists, engineers, and entrepreneurs to apply the modern methods of acoustical physics to probe the unknown sea. The book is an authoritative, modern text with examples and exercises. It contains techniques to solve the direct problems, solutions of inverse problems, and an extensive bibliography from the earliest use of sound in the sea to present references.Written by internationally recognized scientists, the book provides background to measure ocean parameters and processes, find life and objects in the sea, communicate underwater, and survey the boundaries of the sea. Fundamentals of Acoustical Oceanography explains principles of underwater sound propagation, and describes how both actively probing sonars and passively listening hydrophones can reveal what the eye cannot see over vast ranges of the turbid ocean. This book demonstrates how to use acoustical remote sensing, variations in sound transmission, in situ acoustical measurements, and computer and laboratory models to identify the physical and biological parameters and processes in the sea.* Offers an integrated, modern approach to passive and active underwater acoustics* Contains many examples of laboratory scale models of ocean-acoustic environments, as well as descriptions of experiments at sea* Covers remote sensing of marine life and the seafloor* Includes signal processing of ocean sounds, physical and biological noises at sea, and inversions* resents sound sources, receivers, and calibration* Explains high intensities; explosive waves, parametric sources, cavitation, shock waves, and streaming* Covers microbubbles from breaking waves, rainfall, dispersion, and attenuation* Describes sound propagation along ray paths and caustics* Presents sound transmissions and normal mode methods in ocean waveguides

Proceedings of the Third European Conference on Underwater Acoustics

Author : John S. Papadakis
Publisher :
ISBN 13 :
Total Pages : 632 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Proceedings of the Third European Conference on Underwater Acoustics by : John S. Papadakis

Download or read book Proceedings of the Third European Conference on Underwater Acoustics written by John S. Papadakis and published by . This book was released on 1996 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Progress in Underwater Acoustics

Author : Harold Merklinger
Publisher : Springer Science & Business Media
ISBN 13 : 1461318718
Total Pages : 815 pages
Book Rating : 4.4/5 (613 download)

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Book Synopsis Progress in Underwater Acoustics by : Harold Merklinger

Download or read book Progress in Underwater Acoustics written by Harold Merklinger and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 815 pages. Available in PDF, EPUB and Kindle. Book excerpt: IMAGE TRACKS AT HALIFAX by L.B. Felsen All living kind much effort spend Some model modes, some model rays, To cope with their environment Some feel that spectra all portrays. Some use their eyes, some use their nose Then there are those who with despatch, To sense where other things repose. Take refuge in the ocean wedge. For one group, nothing's more profound Than to explore the world with sound. If things get messy, randomize. These audio diagnosticians What's partly smooth, determinize. You ponder, is it this or that? Go by the name of acousticians. And wish you were a lowly bat They regularly meet to check Whether their sonogram's on track. The meeting's hosts did treat us well. With images stored in their packs, They let the climate cast its spell. This year they came to Halifax. No weath'ry hope was placed in vain. There they combined with ocean types We were exposed to wind and rain, And each could hear the other's gripes. We glimpsed blue sky through clouds dispersed. A meeting naturally does start But rainy sequence was reversed: Reviewing present state of art. The ocean types would like it wet What we found out is where it's at: Yet they got stuck with sun instead. We cannot hope to match the bat Each confrence has the same refrain: Computer printouts by the reams It has been fun to meet again.