Acoustic And Related Properties Of The Sea Floor

Author : Edwin Lee Hamilton
Publisher : Unknown
Page : 28 pages
File Size : 49,6 Mb
Release : 1975
Category : Marine sediments
ISBN : UCSD:31822029849288

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Acoustic and Related Properties of the Sea Floor by Edwin Lee Hamilton Pdf

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 : Darrell Jackson,Michael Richardson
Publisher : Springer Science & Business Media
Page : 634 pages
File Size : 49,5 Mb
Release : 2007-08-02
Category : Science
ISBN : 9780387369457

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High-Frequency Seafloor Acoustics by Darrell Jackson,Michael Richardson Pdf

This book is a research monograph on high-Frequency Seafloor Acoustics. It is the first book in a new series sponsored by the Office of Naval Research on the latest research in underwater acoustics. It provides a critical evaluation of the data and models pertaining to high-frequency acoustic interaction with the seafloor, which will be of interest to researchers in underwater acoustics and to developers of sonars. Models and data are presented so as to be readily usable, backed up by extensive explanation. Much of the data is new, and the discussion in on two levels: concise descriptions in the main text backed up by extensive technical appendices.

Author : Edwin Lee Hamilton
Publisher : Unknown
Page : 234 pages
File Size : 54,9 Mb
Release : 1969
Category : Marine sediments
ISBN : UCSD:31822009210386

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Sound Velocity, Elasticity, and Related Properties of Marine Sediments, North Pacific by Edwin Lee Hamilton Pdf

Author : Ronald Chaney,Gideon Almagor
Publisher : CRC Press
Page : 566 pages
File Size : 51,8 Mb
Release : 2015-11-04
Category : Technology & Engineering
ISBN : 9781482207415

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Seafloor Processes and Geotechnology by Ronald Chaney,Gideon Almagor Pdf

An ideal resource for civil engineers working with offshore structures, pipelines, dredging, and coastal erosion, Seafloor Processes and Geotechnology bridges the gap between the standard soil mechanics curriculum of civil engineering and published material on marine geotechnology. Utilizing organized information on sediments and foundations for ma

Author : Anonim
Publisher : Unknown
Page : 240 pages
File Size : 51,7 Mb
Release : 1975
Category : Underwater acoustics
ISBN : UCSD:31822034554899

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Oceanic Acoustic Modelling: Sea bottom by Anonim Pdf

Author : William A. Kuperman
Publisher : Springer Science & Business Media
Page : 700 pages
File Size : 51,7 Mb
Release : 2013-03-13
Category : Science
ISBN : 9781468490510

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Bottom-Interacting Ocean Acoustics by William A. Kuperman Pdf

vi These categories seem to represent the basic breakdown by field of present-day research in this area. Though each paper has been classified into one of these categories (for conference organization purpose), many papers overlapped two or three areas. It is also interesting to note that not only are scientific results being communicated, but the latest techniques and the state-of-the-art tools of the trade (existing and in development) are also being presented. The forty-six papers presented at this conference represent the work of seventy scientists working at universities, government laboratories, and industrial laboratories in seven different countries . We would like to thank the contributors for their efforts and especially for their promptness in providing the editors with their final manuscripts. William A. Kuperman Finn B. Jensen La Spezia, Italy July 1980 CONTENTS GEOACOUSTIC PROPERTIES OF MARINE SEDIMENTS Attenuation of Sound in Marine Sediments . • 1 J. M. Hovem Directivity and Radiation Impedance of a Transducer 15 Embedded in a Lossy Medium . •• •••••• G. H. Ziehm Elastic Properties Related to Depth of Burial, Strontium Content and Age, and Diagenetic Stage in Pelagic Carbonate Sediments . . • • . • • • . 41 M. H. Manghnani, S. O. Schianger, and P. D. Milholland Application of Geophysical Methods 'and Equipment to Explore the Sea Bottom . •• •••. • 53 H. F. Weichart The Acoustic Response of Some Gas-Charged Sediments in the Northern Adriatic Sea • • • • . • • • • 73 A.

Author : T. Akal,J.M. Berkson
Publisher : Springer Science & Business Media
Page : 898 pages
File Size : 48,5 Mb
Release : 2013-03-09
Category : Science
ISBN : 9781461322016

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Ocean Seismo-Acoustics by T. Akal,J.M. Berkson Pdf

Seafloor investigation has long been a feature of not only seismology but also of acoustics. Indeed it was acoustics that produced depth sounders, giving us the first capability of producing both global and local maps of the seafloor. Subsequently, better instrumentation and techniques led to a clearer, more quantitative picture of the seabed itself, which stimulated new hypotheses such as seafloor spreading through the availability of more reliable data on sediment thickness over ocean basins and other bottom features. Geologists and geophysicists have used both acoustic and seismic methods to study the seabed by considering the propagation of signals arising from both natural seismic events and man-made impulsive sources. Although significant advances have been made in instrumentation, such as long towed geophysical arrays, ai r guns and ocean bot tom seismometers, the pic ture of the seafloor is still far from complete. Underwater acoustics concerns itself today with the phenomena of propagation and noise at frequencies and ranges that require an understanding of acoustic interaction at both of its boundaries, the sea surface and seafloor, over depths ranging from tens to thousands of meters. Much of the earlier higher frequency (>1 kHz) work included the characterization of the seafloor in regimes of reflection coefficients which were empirically derived from surveys. The results of these studies met with only limited success, confined as they were to those areas where survey data existed and lacking a physical understanding of the processes of reflection and scattering.

Author : Nan Wu ,Ningning Zhang,Yan Liu,Fei Han,Cheng Zhang,Xingsen Guo
Publisher : Frontiers Media SA
Page : 264 pages
File Size : 42,5 Mb
Release : 2024-01-29
Category : Science
ISBN : 9782832543610

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Methods and advances in marine geology and hydrodynamics environment by Nan Wu ,Ningning Zhang,Yan Liu,Fei Han,Cheng Zhang,Xingsen Guo Pdf

Author : Anonim
Publisher : Unknown
Page : 724 pages
File Size : 42,7 Mb
Release : 1983
Category : Aeronautics
ISBN : UIUC:30112104409237

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Scientific and Technical Aerospace Reports by Anonim Pdf

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Author : E. L. Hamilton
Publisher : Unknown
Page : 58 pages
File Size : 51,7 Mb
Release : 1965
Category : Bering Sea
ISBN : UCSD:31822020695425

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Geoacoustic Models of the Sea Floor by E. L. Hamilton Pdf

The information and technology necessary to derive a valid geological-geophysical-acoustic model of the sea floor are presented. Two contrasting models are detailed and discussed: one in the Bering Sea which has a shallow-water, high-velocity, hard-sand bottom; and the Mohole (Guadalupe Site) model which has a deep-water, low-velocity, soft-clay bottom. Other models are to be reported in a continuing series. (Author).

Author : Nicholas P. Chotiros
Publisher : Springer
Page : 99 pages
File Size : 54,6 Mb
Release : 2017-03-20
Category : Science
ISBN : 9783319142777

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Acoustics of the Seabed as a Poroelastic Medium by Nicholas P. Chotiros Pdf

This book presents a concise description of the acoustics of ocean sediment acoustics, including the latest developments that address the discrepancies between theoretical models and experimental measurements. This work should be of interest to ocean acoustic engineers and physicists, as well as graduate students and course instructors. The seabed is neither a liquid nor a solid, but a fluid saturated porous material that obeys the wave equations of a poroelastic medium, which are significantly more complicated than the equations of either a liquid or a solid. This volume presents a model of seabed acoustics with input parameters that allow the model to cover a wide range of sediment types. The author includes example reflection and transmission curves which may be used as typical for a range of sediment types. The contents of this book will allow the reader to understand the physical processes involved in the reflection, propagation, and attenuation of sound and shear waves in ocean sediments and to model the acoustic properties for a wide range of applications.

Author : Lloyd Hampton
Publisher : Springer Science & Business Media
Page : 568 pages
File Size : 42,9 Mb
Release : 2013-03-09
Category : Science
ISBN : 9781468408386

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Physics of Sound in Marine Sediments by Lloyd Hampton Pdf

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 : Laura Maraschi,Tommaso Maccacaro,M. H. Ulrich
Publisher : Springer Verlag
Page : 497 pages
File Size : 41,8 Mb
Release : 1989
Category : Science
ISBN : 0387513892

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BL Lac Objects by Laura Maraschi,Tommaso Maccacaro,M. H. Ulrich Pdf

Author : M. Weydert
Publisher : CRC Press
Page : 786 pages
File Size : 42,8 Mb
Release : 2004-01-14
Category : Architecture
ISBN : 9781482286854

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European Conference on Underwater Acoustics by M. Weydert Pdf

This book represents the proceedings of the Conference on Underwater Acoustics, held in September 1992, to bring together all the various disciplines involved in a forum to present the latest research on all aspects of marine acoustics.

Author : Anonim
Publisher : Academic Press
Page : 622 pages
File Size : 44,5 Mb
Release : 1987-09-24
Category : Science
ISBN : 0080860125

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Geophysics Field Measurements by Anonim Pdf

Geophysics Field Measurements