Variations in response to whole-body vibration Intensity dependent effects

When equal sensation contours were obtained from 24 subjects starting at four different intensities (0.5, 1.0, 2.0 and 3.5 m s^?2r.m.s.), significant differences in the shapes of the average contours were obtained. As the overall intensity range increased (from 0.5 to 3.5 m s^?2 r.m.s.), the contours became significantly less linear in shape. Implications of these results for the International Standard on human exposure to whole-body vibration are discussed.