Within the handle portion 2 of the holding vibration tool such as angle grinder 1 or the like are a three-shaft vibration acceleration pickup 13, an A/D converter 19, a microcomputer 20, a display portion 11 and so on. Each time the continuous operation is interrupted, an 8-hour equivalent acceleration value ahW(eq.8h) is obtained based on the detected vibration acceleration signal so as to accumulatively add it in one day. Each time the continuous operation is interrupted, a frequency load vibration acceleration value ahW is obtained, and an 8-hour equivalent acceleration value ahW(eq.8h) is obtained based on this. Further, the residual surplus time tpi is obtained and displayed by using the 8-hour equivalent acceleration value ahW(eq.8h). <IMAGE>
HUMAN BODY VIBRATION EVALUATION DEVICE AND HAND-HELD VIBRATION TOOL