@article{oai:soar-ir.repo.nii.ac.jp:00013457, author = {木村, 仁 and 遠藤, 真美 and 小関, 道彦 and 伊能, 教夫}, issue = {740}, journal = {日本機械学会論文集. C編}, month = {Apr}, note = {A phenomenon that passengers are getting sleepy is often found in running cars or trains. If a mechanism can reproduce this phenomenon, it is feasible to put insomnia patients or infants to sleep without any harmful effects. This will bring extreme benefit for insomnia patients or parents of babies. The purpose of this study is to elucidate the sleep-inducing factors of running cars or trains, and the final goal is to develop a machine which reproduces the environment to put people to sleep. For the first step of this study, we investigated the relationship between sleepiness and vibrations on several trains. The sleepability of each train is discussed by the ratio of sleeping passengers. According to the vibration analyses, the results suggest that comfortable vibration for sleep has mainly low-frequency (〜2 Hz) vibration with particular fluctuation. In addition, it is also guessed that low level jerks contribute the sleepability., Article, 日本機械学会論文集. C編. 74(740):806-813 (2008)}, pages = {806--813}, title = {誘眠効果をもたらす機械的環境の研究}, volume = {74}, year = {2008} }