Acoustic methods have been recently investigated for the detection of shallow landmines. Some plastic landmines
have a flexible case which can made to vibrate by an airborne excitation like a loudspeaker. The soil-mine system shows
a resonant behavior which is used as a signature to discriminate from other rigid objects. The mechanical resonance can
be detected at the soil surface by a remote sensing systems like a laser interferometer. An equivalent physical model of
the mine-soil system has been investigated having the known physical characteristics of mine simulants. The authors
designed and built a test-object with known mechanical characteristics (mass, elasticity, damping factor). The model has
been characterized in laboratory and the results compared with the classic mass-spring loss oscillator described by Voigt.
The vibrations at the soil surface have been measured in various positions with a micro machined accelerometer. The
results of the simulations for the acceleration of the soil-mine system agree well with the experiment. The calibrated
mine model is useful to investigate the variation of the resonance frequency for various buried depths and to compare the
results for different soils in different environmental conditions.