| Autor: |
Williams, K. L., Satkowiak, L. J. |
| Zdroj: |
Journal of the Acoustical Society of America; 1988, Vol. 83 Issue S1, pS95-S95, 1p |
| Abstrakt: |
The experiments described in the previous presentation allow the generation of contour plots of the pressure field within the sediment for different types of sending transducers at several grazing angles (defined here as the angle between the interface and central axis of the sender). These contour plots are compared with theoretical predictions calculated using the SAFARI model [H. Schmidt and F. B. Jensen, J. Acoust. Soc. Am. 77, 813-825 (1985)]. Results indicate that the shear degree of freedom in the sediment is unimportant under the conditions of the experiment. Agreement between SAFARI and experimental pressure field contours is good for all senders used in the experiment. This suggests that nonlinear effects due to parametric array truncation were not readily apparent in the contour plots. Based on the experimentally determined in-sediment direction of propagation, the presence or absence of beam displacement for each type of acoustic source will be discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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