Preferred frequencies for three unconsolidated earth materials
- Department of Geology, State University of New York at Buffalo, Buffalo, New York 14260 (United States)
Exploring near-surface mechanical wave propagation through cohesive and noncohesive soils is important for detecting buried objects (i.e., landmines and unexploded ordnance). Here, we determine that certain preferred frequencies travel through specific soils more efficiently. A controlled-frequency acoustic seismic source was developed to modulate the applied frequency and amplitude. Surface response due to continuous waves traveling through soils was recorded both instantaneously and after a finite load time. Preferred frequencies for sand, clay loam, and silt loam were measured to be 300-330, 100-140, and 140-260 Hz, respectively. Observed frequency shifts were dependent upon applied amplitude and load time.
- OSTI ID:
- 21016231
- Journal Information:
- Applied Physics Letters, Vol. 91, Issue 25; Other Information: DOI: 10.1063/1.2820606; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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