Titlebook: Bottom-Interacting Ocean Acoustics; William A. Kuperman,Finn B. Jensen Book 1980 Springer Science+Business Media New York 1980 Ocean.acous

Creatinine-Test

被诅咒的人

Results and Methods Used to Determine the Acoustic Properties of the Southeast Asian Marginstions from the Southeast Asian shelves and marginal basins. The velocity functions are least-squares regressions of the form V = V. + Kt, where t is one-way vertical travel-time to layer mid-points. The value of K shows surprisingly little variability on the shelves and adjoining basins from the Bay

动脉

乞丐

Some Bottom-Reflection Loss Anomalies near Grazing and Their Effect on Propagation in Shallow Waterlt in higher propagation losses in shallow water than are usually expected. Two frequently observed cases have been studied, one where the bottom can propagate shear waves and another where the bottom is covered by a layer of soft unconsolidated sediments. The first case causes a low-frequency atten

CLEFT

harmony

Inference of Geo-Acoustic Parameters from Bottom-Loss Dataather than bottom-reflected path. The loss along this path, assuming a constant gradient, g, and attenuation, α, in the sediment is proportional to the ratio α/g. Assuming that α varies linearly with frequency, the shallow angle loss appears to increase linearly with both grazing angle and frequency

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spinal-stenosis

Low Frequency Bottom Reflectivity Measurements in the Tufts Abyssal Plaindetermined from measured propagation loss of the first, second, and third bottom bounce paths over a range of grazing angles from 5° to 75°, and for a number of 1/3 octave bands from 40 Hz to 600 Hz. At these low frequencies the bottom loss versus grazing angle indicates a critical angle behaviour,

混合

郊外

Comparison of Synthetic and Experimental Bottom Interactive Waveformst of signals arriving at the receiver via predominantly bottom bounce paths. To reach a point where the merits of such systems could be delineated with confidence or contributions to their conception could be made, it was first necessary to have a believable theoretical model capable of predicting t