Abstract
The purpose of this study is to clarify the temporary threshold shift of finger-tip vibratory sensation after intermittent exposure to vibration transmitted to the hand. Two experiments were carried out using ten subjects with normal vibratory sensation. The intermittent vibration was applied to the right hand through a handle attached to an electro-dynamic vibration exciter. The threshold of 125Hz vibratory sensation was measured in 2.5dB steps at right forefinger-tip before exposure, and after cessation of exposure. As a result, TTS(Temporary Threshold Shift) following the intermittent vibration exposure could be predicted based on the exposure-equivalent rule and the equation of growth and recovery process of TTS.