著者

堤 仁美 田辺 新一 Lei FANG David P. WYON P. Ole FANGER

出版者

公益社団法人 空気調和・衛生工学会

雑誌

空気調和・衛生工学会大会 学術講演論文集 平成17年 (ISSN:18803806)

巻号頁・発行日

pp.945-948, 2005-07-25 (Released:2017-08-31)

---

In order to investigate the effects of extremely low humidity on human health, comfort and performance, subjective experiments were carried out at Technical University of Denmark. Sixty subjects were exposed in climate chambers for 5 hours, performing simulated office work. Four humidity conditions in clean air at 22℃ and 4 conditions in polluted air, 3 of which at constant absolute humidity, were imposed. It was found that 5 hours ofexposure to 15%RH or below in clean air or high air temperature in polluted air is sufficient for the mucous layer of the tear film to become measurably worse. Subjective reports of dry discomfort increased as humidity levels were reduced, although the level of discomfort was never more than mild even at 5%RH. A negative effect of low humidity was found on the performance. The observed increase in blink rate at lower levels of relative humidity may have progressively reduced the rate of visual data acquisition and lead the decreased performance of subjects.