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Study of climate and seasonal effects on soil properties by a nonlinear acoustic technique: the phase shift method
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Paper Abstract

In this study, a new nonlinear acoustic technique, the phase shift method, is developed to measure the hysteretic nonlinearity parameter for a field soil. The technique is based on measuring the variation of phase difference between two transducers, i.e. the phase shift, induced by changing sound level. The hysteretic nonlinear parameter can be extracted from the measured phase shift as a function of sound level, or dynamic strain. With this technique, a long-term soil survey is conducted to study the variations of soil properties due to climate and seasonal changes. The hysteretic nonlinear parameter and sound speed of the soil as functions of temperature, moisture, surface tension, rain precipitation, and time are studied.

Paper Details

Date Published: 17 May 2006
PDF: 12 pages
Proc. SPIE 6217, Detection and Remediation Technologies for Mines and Minelike Targets XI, 621719 (17 May 2006); doi: 10.1117/12.666004
Show Author Affiliations
Zhiqu Lu, The Univ. of Mississippi (United States)
James M. Sabatier, The Univ. of Mississippi (United States)

Published in SPIE Proceedings Vol. 6217:
Detection and Remediation Technologies for Mines and Minelike Targets XI
J. Thomas Broach; Russell S. Harmon; John H. Holloway Jr., Editor(s)

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