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Author : J. Michael McKisic
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (318 download)
Download or read book Ocean Acoustics Program written by J. Michael McKisic and published by . This book was released on 1981 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ivan Tolstoy
Publisher :
ISBN 13 :
Total Pages : 404 pages
Book Rating : 4.0/5 ( download)
Download or read book Ocean Acoustics written by Ivan Tolstoy and published by . This book was released on 1987 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J McKisic (Michael)
Publisher :
ISBN 13 :
Total Pages : 191 pages
Book Rating : 4.:/5 (132 download)
Download or read book Ocean Acoustics Program Summary for FY's 83 and 84 written by J McKisic (Michael) and published by . This book was released on 1985 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J.A. DeSanto
Publisher : Springer Science & Business Media
ISBN 13 : 3642812945
Total Pages : 295 pages
Book Rating : 4.6/5 (428 download)
Download or read book Ocean Acoustics written by J.A. DeSanto and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Topics volume is devoted to a study of sound propagation in the ocean. The effect of the interior of the ocean on underwater sound is analogous to the effect of a lens on light. The oceanic lens is related, as in light propagation, to the index of refraction of the medium. The latter is giv~n by the ratio of the sound frequency to the speed of sound in water, typi ca lly about 1500 m s -1. It is the vari ation of the sound speed due to changing temperature, density, salinity, and pres sure in the complex ocean environment which creates the lens effect. Many oceanic processes such as currents, tides, eddies (circulating, translating regions of wa ter), and internal waves (the wave-like structure of the oceanic density variabil ity) contri bute in turn to the changes in sound speed'. The net effect of the ocean lens is to trap and guide sound waves in a channel created by the lens. The trapped sound can then propagate thousands of miles in this oceanic waveguide. In addition to the propagation in the interior of the ocean, sound can propagate into and back out of the ocean bottom as well as scatter from the ocean surface. Just as the sound produced by a loudspeaker in a room is affected by the walls of the room, so the ocean boundaries and the material properties below the ocean bottom are essential ingredients in the problem.
Author : K. W. Lackie
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (384 download)
Download or read book Report of a Survey of US Academic Programs in Ocean and Underwater Acoustics written by K. W. Lackie and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underwater acoustics remains the principal means to detect and locate submarines and other underwater objects. For this reason, the Office of Naval Research has sponsored a vigorous research program in underwater acoustics and related fields at both academic institutions and Navy in house organizations for many years. Unfortunately, no other Federal Government funding agency sponsors research in this area, and as a result the health, strength, and growth of the field in the US depends entirely on the ONR program. Interviews of senior U.S. acoustician and visits to a number of major institutions indicate that recent reductions in Naval research budgets have caused a significant decline in the vitality of the ocean acoustics research community in the U.S., especially in its capability to train graduate students in at sea experimental techniques and maintain its sea going infrastructure. Although a number of initiatives are identified that would improve the situation, only an increase in financial support will completely solve the problem. The current level of Federal funding is inadequate to support long-term Navy requirements for acoustician, though it may be adequate for the current environment of reduced budgets and priorities. The strength of this field, virtually the only one entrusted entirely to ONR's care, is not being sustained.
Author : National Academies of Sciences Engineering and Medicine
Publisher :
ISBN 13 : 9780309706872
Total Pages : 0 pages
Book Rating : 4.7/5 (68 download)
Download or read book Ocean Acoustics Education and Expertise written by National Academies of Sciences Engineering and Medicine and published by . This book was released on 2025-04-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ocean Acoustics - the study of sound in the ocean, how it travels, interacts with, and is affected by its underwater surroundings - is a growing and critical field. Sound from both natural and human-generated sources can be an effective tool for probing the ocean environment. While the first applications of ocean acoustics began in the military, applications today encompass offshore energy production, national security, environmental monitoring, climate science, exploration and mapping, as well as fundamental ocean science. Even as demand for ocean acoustics grows, workforce development is challenged by both the multidisciplinary nature of the field and its widely varying career paths. Ocean acoustics may be housed in a diversity of departments in higher education institutions, and career paths and trajectory of formal education can range from the vocational/associates' level through the doctorate level. This report examines the state of ocean acoustics education; assesses expected demand for acoustics expertise over the next decade; identifies competencies required across higher education and professional training programs; and presents strategies to raise the profile of careers in ocean acoustics. The report recommends a number of actions that federal agencies, industry, and academia can take to develop the expertise needed to meet current and future workforce demands.
Author : L. Brekhovskikh
Publisher : Springer Science & Business Media
ISBN 13 : 3662023423
Total Pages : 262 pages
Book Rating : 4.6/5 (62 download)
Download or read book Fundamentals of Ocean Acoustics written by L. Brekhovskikh and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: The continents of our planet have already been exploited to a great extent. Therefore man is turning his sight to the vast spaciousness of the ocean whose resources - mineral, biological, energetic, and others - are just beginning to be used. The ocean is being intensively studied. Our notions about the dynam ics of ocean waters and their role in forming the Earth's climate as well as about the structure of the ocean bottom have substantially changed during the last two decades. An outstanding part in this accelerated exploration of the ocean is played by ocean acoustics. Only sound waves can propagate in water over large distances. Practically all kinds of telemetry, communication, location, and re mote sensing of water masses and the ocean bottom use sound waves. Propa gating over thousands of kilometers in the ocean, they bring information on earthquakes, eruptions of volcanoes, and distant storms. Projects using acoustical tomography systems for exploration of the ocean are presently be ing developed. Each of these systems will allow us to determine the three-di mensional structure of water masses in regions as large as millions of square kilometers.
Author : Carey D. Smith
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (318 download)
Download or read book Management Plan for Ocean Environmental Acoustics Programs in Support of Mobile Sonar Technology Development written by Carey D. Smith and published by . This book was released on 1975 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of the U.S. Navy as a credible world sea power is placing increasing demands on sonar systems development for ASW. The management of the Navy's Ocean Environmental Acoustic Program (EVA) is of great concern because of the critical nature of this support service to systems development. At present, sonar developers and operators do not have sufficient EVA data and models available for optimum systems design and use. The deficiency is primarily due to a technological gap between EVA program outputs and the system developers requirements. The most effective and efficient management and implementation of the EVA program is therefore required. A detailed plan for a program management structure in NAVSEA (Sonar Technology Division) is presented; it calls for the establishment of a technical group assigned the responsibility for developing and maintaining a working relationship between environmental acousticians and systems developers.
Author : Herman Medwin
Publisher : Academic Press
ISBN 13 : 0080532160
Total Pages : 739 pages
Book Rating : 4.0/5 (85 download)
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
Author : K. W. Lackie
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (384 download)
Download or read book Report of a Survey of US Academic Programs in Ocean and Underwater Acoustics written by K. W. Lackie and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Underwater acoustics remains the principal means to detect and locate submarines and other underwater objects. For this reason, the Office of Naval Research has sponsored a vigorous research program in underwater acoustics and related fields at both academic institutions and Navy in house organizations for many years. Unfortunately, no other Federal Government funding agency sponsors research in this area, and as a result the health, strength, and growth of the field in the US depends entirely on the ONR program. Interviews of senior U.S. acoustician and visits to a number of major institutions indicate that recent reductions in Naval research budgets have caused a significant decline in the vitality of the ocean acoustics research community in the U.S., especially in its capability to train graduate students in at sea experimental techniques and maintain its sea going infrastructure. Although a number of initiatives are identified that would improve the situation, only an increase in financial support will completely solve the problem. The current level of Federal funding is inadequate to support long-term Navy requirements for acoustician, though it may be adequate for the current environment of reduced budgets and priorities. The strength of this field, virtually the only one entrusted entirely to ONR's care, is not being sustained.
Author : Finn B. Jensen
Publisher : Springer Science & Business Media
ISBN 13 : 1441986782
Total Pages : 808 pages
Book Rating : 4.4/5 (419 download)
Download or read book Computational Ocean Acoustics written by Finn B. Jensen and published by Springer Science & Business Media. This book was released on 2011-06-10 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: Senior level/graduate level text/reference presenting state-of-the- art numerical techniques to solve the wave equation in heterogeneous fluid-solid media. Numerical models have become standard research tools in acoustic laboratories, and thus computational acoustics is becoming an increasingly important branch of ocean acoustic science. The first edition of this successful book, written by the recognized leaders of the field, was the first to present a comprehensive and modern introduction to computational ocean acoustics accessible to students. This revision, with 100 additional pages, completely updates the material in the first edition and includes new models based on current research. It includes problems and solutions in every chapter, making the book more useful in teaching (the first edition had a separate solutions manual). The book is intended for graduate and advanced undergraduate students of acoustics, geology and geophysics, applied mathematics, ocean engineering or as a reference in computational methods courses, as well as professionals in these fields, particularly those working in government (especially Navy) and industry labs engaged in the development or use of propagating models.
Author : Lisheng Zhou
Publisher : Springer
ISBN 13 : 9811024227
Total Pages : 126 pages
Book Rating : 4.8/5 (11 download)
Download or read book Underwater Acoustics and Ocean Dynamics written by Lisheng Zhou and published by Springer. This book was released on 2016-10-17 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings are a collection of 16 selected scientific papers and reviews by distinguished international experts that were presented at the 4th Pacific Rim Underwater Acoustics Conference (PRUAC), held in Hangzhou, China in October 2013. The topics discussed at the conference include internal wave observation and prediction; environmental uncertainty and coupling to sound propagation; environmental noise and ocean dynamics; dynamic modeling in acoustic fields; acoustic tomography and ocean parameter estimation; time reversal and matched field processing; underwater acoustic localization and communication as well as measurement instrumentations and platforms. These proceedings provide insights into the latest developments in underwater acoustics, promoting the exchange of ideas for the benefit of future research.
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309133157
Total Pages : 220 pages
Book Rating : 4.3/5 (91 download)
Download or read book Ocean Noise and Marine Mammals written by National Research Council and published by National Academies Press. This book was released on 2003-05-22 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the 119 species of marine mammals, as well as for some other aquatic animals, sound is the primary means of learning about the environment and of communicating, navigating, and foraging. The possibility that human-generated noise could harm marine mammals or significantly interfere with their normal activities is an issue of increasing concern. Noise and its potential impacts have been regulated since the passage of the Marine Mammal Protection Act of 1972. Public awareness of the issue escalated in 1990s when researchers began using high-intensity sound to measure ocean climate changes. More recently, the stranding of beaked whales in proximity to Navy sonar use has again put the issue in the spotlight. Ocean Noise and Marine Mammals reviews sources of noise in the ocean environment, what is known of the responses of marine mammals to acoustic disturbance, and what models exist for describing ocean noise and marine mammal responses. Recommendations are made for future data gathering efforts, studies of marine mammal behavior and physiology, and modeling efforts necessary to determine what the long- and short-term impacts of ocean noise on marine mammals.
Author : Paul C. Etter
Publisher : CRC Press
ISBN 13 : 1351679716
Total Pages : 776 pages
Book Rating : 4.3/5 (516 download)
Download or read book Underwater Acoustic Modeling and Simulation, Fifth Edition written by Paul C. Etter and published by CRC Press. This book was released on 2018-03-15 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt: This newest edition adds new material to all chapters, especially in mathematical propagation models and special applications and inverse techniques. It has updated environmental-acoustic data in companion tables and core summary tables with the latest underwater acoustic propagation, noise, reverberation, and sonar performance models. Additionally, the text discusses new applications including underwater acoustic networks and channel models, marine-hydrokinetic energy devices, and simulation of anthropogenic sound sources. It further includes instructive case studies to demonstrate applications in sonar simulation.
Author : United States. Department of Defense
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (31 download)
Download or read book Basic Research Program written by United States. Department of Defense and published by . This book was released on 1980 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Thomas Rossing
Publisher : Springer Science & Business Media
ISBN 13 : 0387304460
Total Pages : 1179 pages
Book Rating : 4.3/5 (873 download)
Download or read book Springer Handbook of Acoustics written by Thomas Rossing and published by Springer Science & Business Media. This book was released on 2007-06-21 with total page 1179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.
Author : Paul C. Etter
Publisher : CRC Press
ISBN 13 : 1351679724
Total Pages : 639 pages
Book Rating : 4.3/5 (516 download)
Download or read book Underwater Acoustic Modeling and Simulation written by Paul C. Etter and published by CRC Press. This book was released on 2018-04-06 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: This newest edition adds new material to all chapters, especially in mathematical propagation models and special applications and inverse techniques. It has updated environmental-acoustic data in companion tables and core summary tables with the latest underwater acoustic propagation, noise, reverberation, and sonar performance models. Additionally
