Impact Of Littoral Environmental Variability On Acoustic Predictions And Sonar Performance

Author : Nicholas G. Pace,Finn B. Jensen
Publisher : Springer Science & Business Media
Page : 620 pages
File Size : 47,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401006262

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Impact of Littoral Environmental Variability on Acoustic Predictions and Sonar Performance by Nicholas G. Pace,Finn B. Jensen Pdf

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.

Author : Darrell Jackson,Michael Richardson
Publisher : Springer Science & Business Media
Page : 634 pages
File Size : 44,9 Mb
Release : 2007-08-02
Category : Science
ISBN : 9780387369457

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High-Frequency Seafloor Acoustics by Darrell Jackson,Michael Richardson Pdf

This book is a research monograph on high-Frequency Seafloor Acoustics. It is the first book in a new series sponsored by the Office of Naval Research on the latest research in underwater acoustics. It provides a critical evaluation of the data and models pertaining to high-frequency acoustic interaction with the seafloor, which will be of interest to researchers in underwater acoustics and to developers of sonars. Models and data are presented so as to be readily usable, backed up by extensive explanation. Much of the data is new, and the discussion in on two levels: concise descriptions in the main text backed up by extensive technical appendices.

Author : National Research Council,Division on Earth and Life Studies,Ocean Studies Board,National Academy of Engineering,Committee on Environmental Information for Naval Use
Publisher : National Academies Press
Page : 218 pages
File Size : 40,8 Mb
Release : 2003-04-01
Category : Technology & Engineering
ISBN : 9780309168434

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Environmental Information for Naval Warfare by National Research Council,Division on Earth and Life Studies,Ocean Studies Board,National Academy of Engineering,Committee on Environmental Information for Naval Use Pdf

Accurate and timely environmental information can provide a tactical advantage to U.S. naval forces during warfare. This report analyzes the current environmental information system used by the U.S. Navy and Marine Corps and recommends ways to address uncertainty and leverage network-centric operating principles to enhance the value of environmental information.

Author : National Research Council,Commission on Geosciences, Environment, and Resources,Ocean Studies Board
Publisher : National Academies Press
Page : 112 pages
File Size : 43,5 Mb
Release : 2000-04-07
Category : Technology & Engineering
ISBN : 9780309067980

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Oceanography and Mine Warfare by National Research Council,Commission on Geosciences, Environment, and Resources,Ocean Studies Board Pdf

Environmental information is important for successful planning and execution of naval operations. A thorough understanding of environmental variability greatly increases the likelihood of mission success. To ensure that naval forces have the most up-to-date capabilities, the Office of Naval Research (ONR) has an extensive environmental research program. This research, to be of greatest use to the warfighter, needs to be directed towards assisting and solving battlefield problems. To increase research community understanding of the operational demands placed on naval operators and to facilitate discussion between these two groups, the National Research Council's (NRC) Ocean Studies Board (OSB), working with ONR and the Office of the Oceanographer of the Navy, convened five previous symposia on tactical oceanography. Oceanography and Mine Warfare examines the following issues: (1) how environmental data are used in current mine warfare doctrine, (2) current procedures for in situ collection of data, (3) the present capabilities of the Navy's oceanographic community to provide supporting information for mine warfare operations, and (4) the ability of oceanographic research and technology developments to enhance current mine warfare capabilities. This report primarily concentrates on the importance of oceanographic data for mine countermeasures.

Author : Xavier Lurton
Publisher : Springer Science & Business Media
Page : 386 pages
File Size : 54,7 Mb
Release : 2002
Category : Science
ISBN : 3540429670

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An Introduction to Underwater Acoustics by Xavier Lurton Pdf

Presented in a clear and concise way as an introductory text and practical handbook, the book provides the basic physical phenomena governing underwater acoustical waves, propagation, reflection, target backscattering and noise. It covers the general features of sonar systems, transducers and arrays, signal processing and performance evaluation. It provides an overview of today's applications, presenting the working principles of the various systems. From the reviews: "Presented in a clear and concise way as an introductory text and practical handbook, the book provides the basic physical phenomena governing underwater acoustical waves, propagation, reflection, target backscattering and noise. ⦠It provides an overview of todayâs applications, presenting the working principles of the various systems." (Oceanis, Vol. 27 (3-4), 2003) "This book is a general survey of Underwater Acoustics, intended to make the subject âas easily accessible as possible, with a clear emphasis on applications.â In this the author has succeeded, with a wide variety of subjects presented with minimal derivation ⦠. There is an emphasis on technology and on intuitive physical explanation ⦠." (Darrell R. Jackson, Journal of the Acoustic Society of America, Vol. 115 (2), February, 2004) "This is an exciting new scientific publication. It is timely and welcome ⦠. Furthermore, it is up to date and readable. It is well researched, excellently published and ranks with earlier books in this discipline ⦠. Many persons in the marine science field including acousticians, hydrographers, oceanographers, fisheries scientists, engineers, educators, students ⦠and equipment manufacturers will benefit greatly by reading all or part of this text. The author is to be congratulated on his fine contribution ⦠." (Stephen B. MacPhee, International Hydrographic Review, Vol. 4 (2), 2003)

Author : Dr. Alexandra Tolstoy,Yu-Chiung Teng,Erchang Shang
Publisher : World Scientific
Page : 493 pages
File Size : 48,5 Mb
Release : 2004
Category : Technology & Engineering
ISBN : 9789812389213

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Theoretical and Computational Acoustics 2003 by Dr. Alexandra Tolstoy,Yu-Chiung Teng,Erchang Shang Pdf

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.

Author : Boris Katsnelson,Valery Petnikov,James Lynch
Publisher : Springer Science & Business Media
Page : 540 pages
File Size : 40,5 Mb
Release : 2012-02-22
Category : Science
ISBN : 9781441997777

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Fundamentals of Shallow Water Acoustics by Boris Katsnelson,Valery Petnikov,James Lynch Pdf

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.

Author : Paul C. Etter
Publisher : CRC Press
Page : 557 pages
File Size : 53,5 Mb
Release : 2017-12-19
Category : Technology & Engineering
ISBN : 9781351831987

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Underwater Acoustic Modeling and Simulation by Paul C. Etter Pdf

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.

Author : Fred Tudor Erskine
Publisher : Unknown
Page : 188 pages
File Size : 45,8 Mb
Release : 2013
Category : Naval research
ISBN : MINN:31951D03732352V

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A History of the Acoustics Division of the Naval Research Laboratory by Fred Tudor Erskine Pdf

Author : George V. Frisk
Publisher : Pearson Education
Page : 391 pages
File Size : 51,5 Mb
Release : 1994-01-02
Category : Technology & Engineering
ISBN : 9780132441544

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Ocean and Seabed Acoustics by George V. Frisk Pdf

Respected scientist and educator George V. Frisk draws on his extensive professional experience to demonstrate how the ocean environment provides an excellent setting in which to display general principles of wave propagation that are also applicable to other areas of wave physics. Ocean and Seabed Acoustics proceeds with a derivation of elementary solutions to the wave equation in free space and then progressively addresses problems of increasing complexity. This book concludes with a discussion of acoustic wave propagation due to a point source in an inhomogeneous waveguide with lossy boundaries.

Author : Andrea Caiti,N. Ross Chapman,Jean-Pierre Hermand,Sérgio M. Jesus
Publisher : Springer Science & Business Media
Page : 331 pages
File Size : 48,6 Mb
Release : 2006-09-21
Category : Science
ISBN : 9781402043864

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Acoustic Sensing Techniques for the Shallow Water Environment by Andrea Caiti,N. Ross Chapman,Jean-Pierre Hermand,Sérgio M. Jesus Pdf

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.

Author : Anonim
Publisher : Unknown
Page : 988 pages
File Size : 52,8 Mb
Release : 2004
Category : Mines (Military explosives)
ISBN : CORNELL:31924099390696

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Proceedings of the ... International Symposium on Technology and the Mine Problem by Anonim Pdf

Author : Kevin J. Noone,Ussif Rashid Sumaila,Robert J. Diaz
Publisher : Newnes
Page : 372 pages
File Size : 48,8 Mb
Release : 2013-06-29
Category : Science
ISBN : 9780124076617

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Managing Ocean Environments in a Changing Climate by Kevin J. Noone,Ussif Rashid Sumaila,Robert J. Diaz Pdf

Managing Ocean Environments in a Changing Climate summarizes the current state of several threats to the global oceans. What distinguishes this book most from previous works is that this book begins with a holistic, global-scale focus for the first several chapters and then provides an example of how this approach can be applied on a regional scale, for the Pacific region. Previous works usually have compiled local studies, which are essentially impossible to properly integrate to the global scale. The editors have engaged leading scientists in a number of areas, such as fisheries and marine ecosystems, ocean chemistry, marine biogeochemical cycling, oceans and climate change, and economics, to examine the threats to the oceans both individually and collectively, provide gross estimates of the economic and societal impacts of these threats, and deliver high-level recommendations. Nominated for a Katerva Award in 2012 in the Economy category State of the science reviews by known marine experts provide a concise, readable presentation written at a level for managers and students Links environmental and economic aspects of ocean threats and provides an economic analysis of action versus inaction Provides recommendations for stakeholders to help stimulate the development of policies that would help move toward sustainable use of marine resources and services

Author : Ameer Abdulla,Olof Linden
Publisher : IUCN
Page : 170 pages
File Size : 41,5 Mb
Release : 2008
Category : Electronic
ISBN : 9782831710792

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Maritime Traffic Effects on Biodiversity in the Mediterranean Sea by Ameer Abdulla,Olof Linden Pdf

Author : Hans Slabbekoorn,Robert J. Dooling,Arthur N. Popper,Richard R. Fay
Publisher : Springer
Page : 309 pages
File Size : 49,9 Mb
Release : 2018-08-20
Category : Medical
ISBN : 9781493985746

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Effects of Anthropogenic Noise on Animals by Hans Slabbekoorn,Robert J. Dooling,Arthur N. Popper,Richard R. Fay Pdf

Over the past several years, many investigators interested in the effects of man-made sounds on animals have come to realize that there is much to gain from studying the broader literature on hearing sound and the effects of sound as well as data from the effects on humans. It has also become clear that knowledge of the effects of sound on one group of animals (e.g., birds or frogs) can guide studies on other groups (e.g., marine mammals or fishes) and that a review of all such studies together would be very useful to get a better understanding of the general principles and underlying cochlear and cognitive mechanisms that explain damage, disturbance, and deterrence across taxa. The purpose of this volume, then, is to provide a comprehensive review of the effects of man-made sounds on animals, with the goal of fulfilling two major needs. First, it was thought to be important to bring together data on sound and bioacoustics that have implications across all taxa (including humans) so that such information is generally available to the community of scholars interested in the effects of sound. This is done in Chaps. 2-5. Second, in Chaps. 6-10, the volume brings together what is known about the effects of sound on diverse vertebrate taxa so that investigators with interests in specific groups can learn from the data and experimental approaches from other species. Put another way, having an overview of the similarities and discrepancies among various animal groups and insight into the “how and why” will benefit the overall conceptual understanding, applications in society, and all future research.