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Author : Edwin Lee Hamilton
Publisher : Unknown
Page : 234 pages
File Size : 48,5 Mb
Release : 1969
Category : Marine sediments
ISBN : UCSD:31822009210386
Author : Edwin Lee Hamilton
Publisher : Unknown
Page : 28 pages
File Size : 45,8 Mb
Release : 1975
Category : Marine sediments
ISBN : UCSD:31822029849288
The general objectives of this investigation were to determine and study those characteristics of the sea floor that affect sound propagation and the prediction of sonar performance; to support underwater acoustics' experiments and theory by furnishing information on the mass physical properties of sediments and rocks in the form of geoacoustic models of the sea floor; and to develop models of the sea floor which include gradients of sound velocity and attenuation, density, and elastic properties. Specifically, the minor objectives were to revise and review earlier work on the relations between frequency and attenuation of compressional (sound) waves in marine sediments and on the relations between attenuation and sediment porosity. The major objectives were to determine and predict variations of the attenuation of sound waves with depth in the sea floor.
Author : Anonim
Publisher : Unknown
Page : 30 pages
File Size : 40,8 Mb
Release : 1969
Category : Marine sediments
ISBN : UCSD:31822020670931
In situ measurements were made of the velocity and attenuation of compressional waves and of velocities of Stoneley waves (from which shear-wave velocities were computed) at six stations in the sea floor off San Diego, California. Water depths ranged from 20 to 1130 meters, and sediment types ranged from medium sand to clayey silt. Sediment densities, porosities, and grain sizes were measured in samples taken at each station. The unique data obtained allowed tentative evaluations of models and equations, and computation of constants, for elastic and viscoelastic saturated, porous media. (Author).
Author : L. R. B. Duykers
Publisher : Unknown
Page : 36 pages
File Size : 48,9 Mb
Release : 1971
Category : Marine sediments
ISBN : UCSD:31822031466634
Acoustic relaxation theory for visco-elastic media provides for sound propagation in unconsolidated marine sediments. For the frequency range of 14 to 200 kHz, dispersion for compressional-wave and shear-wave velocity is negligible for all practical purposes, but sound absorption shows significant changes. (Author).
Author : Lloyd Hampton
Publisher : Springer Science & Business Media
Page : 568 pages
File Size : 44,6 Mb
Release : 2013-03-09
Category : Science
ISBN : 9781468408386
The phenomenon of sound transmissions through marine sediments is of extreme interest to both the United States civilian and Navy research communities. Both communities have conducted research within the field of this phenomenon approaching it from different perspectives. The academic research community has approached it as a technique for studying sedimentary and crustal structures of the ocean basins. The Navy research community has approached it as an additional variable in the predictability of sound trans mission through oceanic waters. In order to join these diverse talents, with the principal aim of bringing into sharp focus the state-of-the-science in the problems relating to the behavior of sound in marine sediments, the Office of Naval Research organized and sponsored an invited symposium on this subject. The papers published in this volume are the results of this symposium and mark the frontiers in the state-of-the-art. The symposia series were based on five research areas identified by ONR as being particularly suitable for critical review and for the appraisal of future research trends. These areas include: 1. Physics of Sound in Marine Sediments, 2. Physical and Engineering Properties of Deep-Sea Sediments, 3. The Role of Bottom Currents in Sea Floor Geological Processes, 4. Nephelometry and the Optical Properties of the Ocean I'laters, S. Natural Gases in Marine Sediments and Their Mode of Distribution. These five areas also form some of the research priorities of the ONR program in Marine Geology and Geophysics.
Author : Anonim
Publisher : Unknown
Page : 1300 pages
File Size : 48,7 Mb
Release : 1970
Category : Geology
ISBN : MINN:31951000873825O
1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.
Author : Anonim
Publisher : Unknown
Page : 1324 pages
File Size : 45,7 Mb
Release : 1973
Category : Geology
ISBN : UCAL:B3415897
Author : H.H. Rieke,G.V. Chilingarian
Publisher : Elsevier
Page : 423 pages
File Size : 53,7 Mb
Release : 1974-01-01
Category : Science
ISBN : 0080869270
Compaction of Argillaceous Sediments
Author : Herman Medwin,Clarence S. Clay
Publisher : Academic Press
Page : 712 pages
File Size : 41,9 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
Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 890 pages
File Size : 40,7 Mb
Release : 1971
Category : Geophysics
ISBN : UOM:39015018207343
Author : Anonim
Publisher : Unknown
Page : 876 pages
File Size : 53,8 Mb
Release : 1971
Category : Geophysics
ISBN : RUTGERS:39030023367529
Author : Harold D. Hess
Publisher : Unknown
Page : 404 pages
File Size : 53,8 Mb
Release : 1971
Category : Sand and gravel industry
ISBN : UCSD:31822020629465
Author : G.V. Chilingarian,K.H. Wolf
Publisher : Elsevier
Page : 807 pages
File Size : 48,9 Mb
Release : 1975-01-01
Category : Science
ISBN : 0080869297
Compaction of Coarse-Grained Sediments, I
Author : Anonim
Publisher : Unknown
Page : 928 pages
File Size : 43,9 Mb
Release : 1971
Category : Water
ISBN : STANFORD:36105007166171
Author : Robert J. Urick
Publisher : Unknown
Page : 268 pages
File Size : 41,5 Mb
Release : 1979
Category : Sound
ISBN : UIUC:30112052140529