| Autor: |
Horton, C. W., Mitchell, S. K., Barnard, G. R. |
| Zdroj: |
Journal of the Acoustical Society of America; 1967, Vol. 41 Issue 3, p635-643, 9p |
| Abstrakt: |
A rough surface 32 in. by 32 in. in size was made of a pressure-release material. The relief of this surface was approximately Gaussian with a standard deviation of 0.6 wavelengths at 100 kHz. Experimental measurements were made of the scattering of acoustic waves in the plane of incidence at a frequency of 100 kHz for grazing angles of incidence of 20°, 40°, 45°, and 90°. The grazing angle of reflection was varied from 6° to 116° in each case. One set of measurements was made at 200 kHz. The statistical parameters of the surface were computed and these values were used in the theoretical formulas developed by Eckart. Close agreement between experiment and theory was obtained for all measurements except at an incidence grazing angle of 30°. In this case, it was necessary to introduce a correction to the mean-square surface relief in order to correct for the the shadowing effect. Theoretical results are presented for the scattering coefficient for directions not in the plane of incidence. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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