Effects of Impulse Vibration on the hand-arm System
通过实验比较脉冲与非脉冲振动对手臂系统的急性影响，发现短时间暴露下两者无显著差异，认为无需采用比国际标准更严格的脉冲振动评估。
Theoretical considerations and published research show that hitherto there is insufficient knowledge to establish whether it is necessary to include the impulsiveness of vibration in the assessment of health risk. Experiments have been carried out to examine whether there are different acute effects of impulse and nonimpulse vibration from hand-held tools on the hand-arm system. Ten male subjects were exposed to simulated Z vibration of different hand tools under laboratory conditions. The human response was evaluated from measurements of (i) the biodynamic behavior of the hand-arm system (wrist, elbow), (ii) muscle activity (flexor carpi ulnaris, biceps, and triceps muscles), (iii) peripheral circulation (skin temperature), and (iv) perception. No general significant differences in the acute effects were found between shock-type vibration and nonimpulsive vibration for short duration exposure (up to 8 min) to vibration with the same frequency-weighted acceleration. It was concluded that no assessment of impulse vibration more stringent than that proposed by the International Organization for Standardization seems justified.