Studies on the ratio sensibility of vibration

Abstract

Experimental studies were made, with the following briefly stated results, on the ratio sensibility which set on the basis of amplitude 1 mm, in case of whole body vibration.
The loudness of vibratory sensibility, in case of twofold the stimuli, agreed nearly with the magnification of stimuli. But in case of three-, four- and fivefold the stimuli, the loudness of vibratory sensibility was exceedingly greater than the magnification of stimuli. The relation between the loudness of vibratory sensibility and the stimuli, in case of vertical vibration at 10 c/s, is represented approximately by
S=2^n-1
where n: the amplitude in mm
S: the number which show the loudness of vibratory sensibility against the vibration of amplitude 1 mm in fold.