Underground Imaging Using Stacking Method of Reflected Scattered Waves: Study of the Longitudinal Sound Source Using Super-Magnetostriction Vibrator

Underground imaging using a stacking method of reflected scattered waves has been studied. A sound source made of aluminum has already been employed in the hammer method. However, the amplitude of the reflected scattered waves is not stable. Therefore, we propose a new sound source comprising a super-magnetostriction vibrator whose displacement is 100 times larger than that of a conventional magnetostriction transducer. The experimental results show the potential of this new sound source.