Sound Velocity, Elasticity, and Related Properties of Marine Sediments, North Pacific. 3. Prediction of In Situ Properties PDF Download
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Author: E. L. Hamilton Publisher: ISBN: Category : Languages : en Pages : 81
Book Description
A study of the acoustic and related properties of the sea floor in three major environments of the North Pacific: the continental terrace (shelf and slope), abyssal plain (turbidite), and abyssal hill (pelagic). Discussions cover the correction of laboratory to insitu values, and the prediction of in situ values. The methods developed are applicable to other areas and sediments.
Author: E. L. Hamilton Publisher: ISBN: Category : Languages : en Pages : 81
Book Description
A study of the acoustic and related properties of the sea floor in three major environments of the North Pacific: the continental terrace (shelf and slope), abyssal plain (turbidite), and abyssal hill (pelagic). Discussions cover the correction of laboratory to insitu values, and the prediction of in situ values. The methods developed are applicable to other areas and sediments.
Author: E. L. Hamilton Publisher: ISBN: Category : Languages : en Pages : 62
Book Description
A study of marine sediments in three major environments of the North Pacific: the continental terrace (shelf and slope), abyssal plain (turbidite), and abyssal hill (pelagic). Laboratory values of the mass physical properties of the sediments (e.g., sound velocity, density, porosity, grain size, and others) are measured and computed and their empirical relationships and environmental differences are discussed.
Author: E. L. Hamilton Publisher: ISBN: Category : Languages : en Pages : 66
Book Description
A study of the elastic properties of marine sediments from three major environments of the North Pacific: the continental terrace (shelf and slope), abyssal plain (turbidite), and abyssal hill (pelagic). Elastic constants are measured and computed. Discussions cover elastic and viscoelastic models, compressibility, bulk modulus, rigidity (shear) modulus, Lame's constant, Poisson's ratio, density, shear- and compressional-wave velocities, and interrelationships between these and other physical properties.
Author: Edwin Lee Hamilton Publisher: ISBN: Category : Marine sediments Languages : en Pages : 28
Book Description
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: Y. Igarashi Publisher: ISBN: Category : Marine sediments Languages : en Pages : 48
Book Description
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).