In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 103, No. 5_Supplement ( 1998-05-01), p. 2794-2794
Abstract:
The preliminary results of acoustic detection of a nonmetallic object embedded in a ground material model at a shallow depth is investigated. The frequency range of the acoustic wave is optimized to the composition of the ground material model to obtain minimum attenuation of the received signal. The investigation considers both theoretical and experiment aspects of the problem to provide a better understanding of the interaction of the acoustic waves with the ground model and the embedded nonmetallic object. One part of the theory is aimed at finding the optimal acoustic signal with maximum ground penetration as a function of frequency, band width, signal energy, and other wave characteristics. The other part of the theory considers ground material characteristics such as grain size and contact areas, density, rigidity, and porosity. In the experimental investigation both through-transmission and pulse-echo methods are used. The results include the relationship between the optimal frequency for maxi-mum amplitude of the received signal, wave velocity, band-width, incident direction, signal energy, attenuation, ground material, and the embedded object characteristics.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1998
detail.hit.zdb_id:
1461063-2
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