The Velocity And Ray Paths Of Sound Waves In Deep Sea Water
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Fundamentals of Ocean Acoustics
| Author | : L. Brekhovskikh |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 262 |
| Release | : 2013-03-14 |
| Genre | : Science |
| ISBN | : 3662023423 |
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.
Ocean Acoustics
| Author | : J.A. DeSanto |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 295 |
| Release | : 2013-11-11 |
| Genre | : Science |
| ISBN | : 3642812945 |
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.
Fundamentals of Acoustical Oceanography
| Author | : Herman Medwin |
| Publisher | : Academic Press |
| Total Pages | : 739 |
| Release | : 1997-11-05 |
| Genre | : 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
Fundamentals of Ocean Acoustics
| Author | : Leonid M. Brekhovskikh |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 281 |
| Release | : 2013-06-29 |
| Genre | : Science |
| ISBN | : 3662073285 |
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.
Sounds in the Sea
| Author | : Herman Medwin |
| Publisher | : Cambridge University Press |
| Total Pages | : 682 |
| Release | : 2005-07-21 |
| Genre | : Science |
| ISBN | : 9780521829502 |
Publisher Description
Springer Handbook of Acoustics
| Author | : Thomas Rossing |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 1179 |
| Release | : 2007-06-21 |
| Genre | : Science |
| ISBN | : 0387304460 |
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.
Geophysics, Realism, and Industry
| Author | : Aitor Anduaga Egaña |
| Publisher | : Oxford University Press |
| Total Pages | : 359 |
| Release | : 2016 |
| Genre | : Philosophy |
| ISBN | : 0198755155 |
'Getting Real' is the first book to simultaneously study the emergence of realist attitudes towards the entities (layers) of the ionosphere and the earth's crust. It proposes a new kind of realism: a realism of social and cultural origins, an entity realism responding to specific commercial and engineering interests.
Geophysics, Realism, and Industry
| Author | : Aitor Anduaga |
| Publisher | : Oxford University Press |
| Total Pages | : 359 |
| Release | : 2015-12-17 |
| Genre | : Science |
| ISBN | : 0191071382 |
Did industry and commerce affect the concepts, values and epistemic foundations of different sciences? If so, how and to what extent? This book suggests that the most significant influence of industry on science in the two case studies treated here had to do with the issue of realism. Using wave propagation as the common thread, this is the first book to simultaneously analyse the emergence of realist attitudes towards the entities of the ionosphere and of the earth's crust. However, what led physicists and engineers to adopt realist attitudes? This book suggests that a new kind of realism —a realism of social and cultural origins- is the answer: a preliminary, entity realism responding to specific commercial and engineering interests, and a realism that was neither strictly instrumental nor exclusively operational. The book has two parts: while Part I focuses on the study of the ionosphere and how the British radio industry affected ionospheric physics, Part II focuses on the study of the Earth's crust and how the American oil industry affected crustal seismology.
