The purpose of this study is to clarify the relationships between the characteristics of vibration exposure to one hand and the variation of skin temperature of fingertips of both sides.

Twenty healthy male students with normal vibratory sensations contributed.

Left hand grips a vibrated metallic The controlled parameters were center frequency of 63, 200 and 500 Hz, magnitude of 0, 10, 20, 40 and 80 m/s2, ripping duration, 0.1, 0.3, 0.5, 1, 2 and 4 m., and grip strength, 5, 10, 20 and 40 N without push-pull force. Thermisters detected the skin temperature the both middle fingertips, at dorsal sides through at 15, 10, 5 and 0 m before grip and after cessation of the grip, every min till 5 min, then, 7 and 10 m

The vibration exposure induced the decrease of skin temperature on both fingertips. The magnitude of decrease depends on the magnitude of vibration and grip strength. All frequencies induced the significant decrease of skin temperature on the exposed fingertip. On the contralateral fingertip, the magnitude of 80 m/s 2 induced the significant decrease,

The observed frequency dependence on skin temperature on both fingertips suggests the necessity of revision of the current frequency weighting standards.