The vibration greatness levels of the artificial compound vibrations composed of several sinusoidal vibrations at the center frequencies of the octave bands between 1 and 250 c/s were measured by comparison with the standard frequency vibration of 20 c/s. Combinations of amplitudes, frequencies and numbers of their components were changed variously. The level of the standard vibration was varied by the tester by the same procedure as in the measurement of the vibration greatness level. Conversion of observed VGL values to VG ones was made by the equation (4) described in Part 4. Effects of frequency intervals, levels and numbers of components in compound vibrations on vibration greatness were examined. On the whole body and hand vibrations in vertical and horizontal directions total vibration greatness (VG_T) could be estimated from each VG value of components (VG_i) and the maximum value (VG_M) by using equation proposed by S. S. Stevens,

VG_T=VG_M + 0.3((∑ VG_i) - VG_M).