In order to investigate the mechanism of acoustic landmines detection

an acoustic-to-seismic coupling based experimental system was developed. And curve-fitting method was adopted to study the measured complex signals. Firstly

acoustic-to-seismic coupling theory was briefly described

and the resonance mechanism of soil-mine system was analyzed. Then a loudspeaker and a geophone array were employed to induce and receive the ground vibration respectively. Finally

average algorithm was used to fit the curves of ground vibration velocity

and experimental phenomenon was explained. Experimental results indicate that the ratio of ground vibration velocity on-to-off mine appears greater than 1 in wide frequency range

up to 24. It proves that landmines can result in distinct changes of ground vibration and the presented experimental system and curve-fitting method are applicable for further study of acoustic landmines detection signals.