Yza taka YOKO YAMA and Ryo ta ． IIVO UE This paper focuses on the effect of the clang sound frorn fjttings ， fumiture ， etc ． ， on the perception of noor vibration 〔 raused by human motion ． First， the psychological scale to measure the vibrtition and sound is cQn − structed by the sensory test． SecQnd ， the physical value represent 血 g the psychological scale is introduced on the basis of the measuremerlt of the vibration and sQund '

This paper discussed on human sensitivity and discomfort to floor Vibrations with various duration times ． Shaking table tests with VibrationS ofvarious combinations ofthe f 廿 equencies ， arnplitudes hnd duration times were per負) rmed ． The sensitivity and the discomfbrt to the whole − body vibrations are evaluated by test subjects seated on the shaking table． As the results ， the duration tlmes influence to the discomfort more than the scnsitiVity to the vibrations ． The discomfbrt to the vibration with the duration time of30sec ． increases about 廿om L2 to 1． 3 times as large as one with the duration time of3sec ． ．

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