The feasibility of the Finite Difference Time Domain (FDTD) technique for acoustic wave created an opportunity for underground cavity detection that poses strong potential for acoustic wave spectrum application. The numerous significant advances have been attained to date, and more technological challenge awaits the optimization of an acoustic system to fill the gap between expectations and pra...

We study the interaction of a seismic wave-field with a spherical acoustic gas-or fluid-filled cavity. The intention of this study is to identify characteristic features in the interaction that may help detecting cavities in the subsurface. This is important for many applications, as in particular the detection of underground nuclear explosions which are to be prohibited by the Comprehensive-Te...

In this study, the seismic interaction of surface foundations and underground cavities was investigated. For this purpose, a parametric study of geometric dimensions of the foundation and cavity, their location, and the effect of the interaction between surface foundations and underground cavities was evaluated. The variable parameters include the ratio of the overburden height to the foundatio...

We present a novel method to detect underground cavities using cross-borehole ground-penetrating radar (GPR). model the propagation of GPR signal across cavity and find that spectrum will be distorted in specific low-pass manner. Comparing spectra received signals with predicted hypothesis-testing approach allows us high probability. The proposed is validated on both simulated real measurements...

We study the interaction of a seismic wave-field with a spherical acoustic gasor fluid-filled cavity. The intention of this study is to clarify whether seismic resonances can be expected, a characteristic feature, which may help detecting cavities in the subsurface. This is important for many applications, as in particular the detection of underground nuclear explosions which are to be prohibit...