Abstract: Sound waves from a powerful loudspeaker can excite acertain type of vibration of the surface of the groundwhen a mine is present and near the surface. In turn, alaser-Doppler vibrometer can be employed to acquireinformation about the surface vibrations. Inparticular, the portion of the ground surface that isvibrating has the shape of the projection of the mineonto the surface. This paper discusses a method basedon Bayesian probability theory for processing laser-Doppler vibrometer data to infer the periphery of anysurface vibration pattern. Difficulties with using aphase- lock loop in determining a surface map are alsodiscussed. !9
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