
doi: 10.1121/1.398874
The improved seismic vibration apparatus (10) includes variable length control means (44) located so as to effectively and efficiently position the vibrator (36) relative to the base plate (30) and apparatus (40) to isolate the vibrator (36) from the control system (44) and from the vehicle frame (12) so that effective seismic vibration is imparted into the base plate (30) and consequently into the earth.
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