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In Situ High Frequency Acoustic Propagation Measurements In Marine Sediments In The Santa Barbara Shelf California
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Book Synopsis In Situ High-frequency Acoustic Propagation Measurements in Marine Sediments in the Santa Barbara Shelf, California by : Y. Igarashi
Download or read book In Situ High-frequency Acoustic Propagation Measurements in Marine Sediments in the Santa Barbara Shelf, California written by Y. Igarashi and published by . This book was released on 1973 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements were made of sound speed and attenuation in marine sediments at 15, 30, and 60kHz by means of in situ acoustic probe instrumentation in conjunction with CURV II. These experiments were conducted in silty sand and sandy silt Continental Shelf areas of the Santa Barbara Channel, California. The main conclusions are: (1) attenuation was found to be about 3, 10, and 20 dB per meter at 15, 30, and 60 kHz, respectively; (2) for the attenuation equation, alpha = K(f to the nth power) (where alpha is sound attenuation in dB per meter, K is a dimensional material parameter, and f is frequency in kHz), the exponent, n, was found to be about 1.2, and K varied from approximately 0.1 to 0.2; (3) no significant sound-speed dispersion was found, in agreement with many other investigations; and (4) individual acoustic measurements made in close proximity to one another in a nominally homogeneous bottom can vary appreciably, although their average values may be in close agreement. (Author).
Book Synopsis In Situ Sediment Attenuation and Sound Velocity Ratio Measured in Shallow Water at the Quinault Range by : R. L. Allman
Download or read book In Situ Sediment Attenuation and Sound Velocity Ratio Measured in Shallow Water at the Quinault Range written by R. L. Allman and published by . This book was released on 1984 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics of Sound in Marine Sediments by : Lloyd Hampton
Download or read book Physics of Sound in Marine Sediments written by Lloyd Hampton and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Acoustic and Related Properties of the Sea Floor by : Edwin Lee Hamilton
Download or read book Acoustic and Related Properties of the Sea Floor written by Edwin Lee Hamilton and published by . This book was released on 1975 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Equipment for in Situ Measurement of Sediment Sound Velocity and Attenuation by : Richard L. Allman
Download or read book Equipment for in Situ Measurement of Sediment Sound Velocity and Attenuation written by Richard L. Allman and published by . This book was released on 1974 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental system has been developed that makes possible the in situ collection of acoustic data in marine sediments, with greater convenience and accuracy than has been obtainable by laboratory analysis of bottom core samples. The feasibility of the system, operating in conjunction with the NUC Cable-Controlled Underwater Research Vehicle (CURV II), has been demonstrated. System capabilities are discussed.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1979 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Government Reports Announcements by :
Download or read book Government Reports Announcements written by and published by . This book was released on 1973-04 with total page 1436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1973 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Index written by and published by . This book was released on 1973 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Wave Attenuation in Unconsolidated Sediments by : Mohammed Badri
Download or read book Seismic Wave Attenuation in Unconsolidated Sediments written by Mohammed Badri and published by . This book was released on 1985 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Petroleum Abstracts. Literature and Patents by :
Download or read book Petroleum Abstracts. Literature and Patents written by and published by . This book was released on 1983 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book American Doctoral Dissertations written by and published by . This book was released on 1989 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1986 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Unique 3-in-1 Research & Development Directory by :
Download or read book Unique 3-in-1 Research & Development Directory written by and published by . This book was released on 1986 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
