磁感应磁声成像
magnetoacoustic tomography with magnetic induction
磁声发射
magnetomechanical acoustic emission
magneto acoustic emission
磁致伸缩回声测深器
magneto striction echo sounder
次级声反馈
secondary acoustic feedback
次声波传感器
sensor of secondary acoustics
次声波异常信号
precursory information of earthquake