Abstract
Experimental study carried out by O'Hanlon and McCauley published in 1974 offers one of useful information on motion sickness characteristics. Frequency weighting curve representing human body sensitivity for low cycle oscillation plays important role in estimate analysis of motion sickness incidence. In this paper, frequency weighting curve proposed by ISO2631-1, W_f was discussed by comparing O'Hanlon's experimental vomiting data. Constant value, K_m converting Motion Sickness Dose Value to Percentage of Vomiting are found to indicate rather small value than K_m=1/3 suggested in ISO2631 Annex D especially for low acceleration level.
