In attempting to determine bow well the human legs isolate man from vibration imparted to his feet, six subjects stood on a shake-table platform. Each subject experienced vertical vibration of 2 and 5 c/s at 1 in. double amplitude ± 0.21 g and ± 1.3 g peak accelerations. Accelerometers recorded the intensity of vibration at the bead level for two minutes of vibration. Results revealed that during the two minutes, the legs gradually lose their ability to isolate, and increasing intensities of motion occur at the bead level.
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