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Author: J. Michael McKisic
Publisher:
ISBN:
Category : Underwater acoustics
Languages : en
Pages : 108
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Book Description
Author: J. Michael McKisic
Publisher:
ISBN:
Category : Underwater acoustics
Languages : en
Pages : 108
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Book Description
Author: Ivan Tolstoy
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 404
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Book Description
Author: J McKisic (Michael)
Publisher:
ISBN:
Category : Underwater acoustics
Languages : en
Pages : 191
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Book Description
Author: K. W. Lackie
Publisher:
ISBN:
Category : Anti-submarine warfare
Languages : en
Pages : 0
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Book Description
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: 9780309706872
Category : Business & Economics
Languages : en
Pages : 0
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Book Description
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: National Research Council
Publisher: National Academies Press
ISBN: 0309133157
Category : Science
Languages : en
Pages : 220
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Book Description
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: Carey D. Smith
Publisher:
ISBN:
Category : Underwater acoustics
Languages : en
Pages : 64
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Book Description
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: 0080532160
Category : Science
Languages : en
Pages : 739
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Book Description
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: L. Brekhovskikh
Publisher: Springer Science & Business Media
ISBN: 3662023423
Category : Science
Languages : en
Pages : 262
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Book Description
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: K. W. Lackie
Publisher:
ISBN:
Category : Anti-submarine warfare
Languages : en
Pages :
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Book Description
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.
