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Author : John Lamar Worzel,Maurice Ewing,Chaim Leib Pekeris
Publisher : Geological Society of America
Page : 256 pages
File Size : 51,8 Mb
Release : 1948
Category : Deep-sea sounding
ISBN : 9780813710273
Author : J. Lamar Worzel,William Maurice Ewing (Geophysicist, United States)
Publisher : Unknown
Page : 128 pages
File Size : 41,9 Mb
Release : 1948
Category : Electronic
ISBN : OCLC:638068069
Author : Robert J. Urick
Publisher : Unknown
Page : 268 pages
File Size : 50,8 Mb
Release : 1979
Category : Sound
ISBN : UIUC:30112052140529
Author : Anonim
Publisher : Unknown
Page : 354 pages
File Size : 50,5 Mb
Release : 2000
Category : Underwater acoustics
ISBN : 1563969688
Author : L. Brekhovskikh,Y. Lysanov
Publisher : Springer Science & Business Media
Page : 262 pages
File Size : 52,5 Mb
Release : 2013-03-14
Category : Science
ISBN : 9783662023426
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 : J.A. DeSanto
Publisher : Springer Science & Business Media
Page : 295 pages
File Size : 48,9 Mb
Release : 2013-11-11
Category : Science
ISBN : 9783642812941
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 : Chaim Leib Pekeris
Publisher : Unknown
Page : 424 pages
File Size : 40,6 Mb
Release : 1945
Category : Explosions
ISBN : UCSD:31822011478724
Author : Robert J. Urick
Publisher : Peninsula Pub
Page : 226 pages
File Size : 45,6 Mb
Release : 1982
Category : Technology & Engineering
ISBN : 0932146082
Rated the most up-to-date source on underwater sound propagation in the current literature. The book covers these topics and more: Basic theory; velocity of sound in the ocean; attenuation and absorption; computer models of sound propagation; reflections and scattering by the sea surface and the sea bottom; temporal and spatial coherence; and multipath in the sea.
Author : National Research Council,Division on Earth and Life Studies,Ocean Studies Board,Committee on Potential Impacts of Ambient Noise in the Ocean on Marine Mammals
Publisher : National Academies Press
Page : 220 pages
File Size : 48,9 Mb
Release : 2003-05-22
Category : Science
ISBN : 9780309133159
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 : Roger Dashen,Walter H. Munk,Kenneth M. Watson
Publisher : Cambridge University Press
Page : 328 pages
File Size : 40,6 Mb
Release : 2010-06-10
Category : Mathematics
ISBN : 0521142458
This 1979 book attempts to connect the known structure of the ocean volume with experimental results in long-range sound transmission through the theory of wave propagation and the path-integral approach. The book is written at the post-graduate level, but has been carefully organised to give experimenters a grasp of important results without undue mathematics.
Author : Ivan Tolstoy,Clarence S. Clay
Publisher : Unknown
Page : 404 pages
File Size : 49,8 Mb
Release : 1987
Category : Science
ISBN : PSU:000033169804
Author : John Lamar Worzel,Chaim Leib Pekeris
Publisher : Unknown
Page : 128 pages
File Size : 49,8 Mb
Release : 1948
Category : Explosions
ISBN : OCLC:13770198
Author : Anatoly Kistovich,Konstantin Pokazeev,Tatiana Chaplina
Publisher : Springer Nature
Page : 171 pages
File Size : 47,9 Mb
Release : 2020-01-03
Category : Science
ISBN : 9783030358846
This book presents a comprehensive overview of hydroacoustics and describes the physical basis of acoustic processes observed in the sea. In addition, it discusses the basic concepts and provides simplified models of sound propagation and acoustic phenomena at the boundary between environments. Lastly, the book examines in detail a number of applications of ocean acoustics and methods. The ocean is the last reserve of natural resources. It is also an essential element in the biosphere, ensuring the latter’s balance, and plays a pivotal role in the Earth’s climate system and global warming. Consequently, studying the ocean is one of humankind’s most critical scientific tasks, but penetrating its mysteries is no mean feat. Acoustics (hydroacoustics) is one of the most powerful tools for examining the water layer and beyond, since sound waves are the only type of radiation that can propagate over distances of hundreds and even thousands of kilometers in the ocean. This unique resource appeals to specialists working in the fields of ocean and atmosphere physics, students and postgraduate students studying sea physics and oceanology, and anyone who is interested in the problems the ocean is currently facing.
Author : Leonid M. Brekhovskikh,Yury P. Lysanov
Publisher : Springer Science & Business Media
Page : 281 pages
File Size : 41,8 Mb
Release : 2013-06-29
Category : Science
ISBN : 9783662073285
As man turns his attention from the overcrowded continents of this planet and explores the spaciousness of the ocean, the applications of ocean acoustics become increasingly numerous and important. This book pro- vides an up-to-date introduction to the theory of sound propagation in the ocean, with much new material having been added throughout the second edition. It includes both ray and wave treatments and considerable attention is paid to stochastic problems such as the scattering of sound at rough surfaces and random inhomogeneties. An introductory chapter that discusses the basic experimental data complements the following theoretical chapters.
Author : Herman Medwin,Clarence S. Clay
Publisher : Academic Press
Page : 712 pages
File Size : 53,9 Mb
Release : 1997-11-05
Category : Science
ISBN : 0080532160
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