Evaluation of Thermal Comfort during Sleeping in Summer - Part I : On Results of Questionnaire Before and After Sleep -

여름철 수면시 온열쾌적감 평가 - 제1보 : 수면 전후 설문에 관하여 -

  • Kim Dong-Gyu (Global Environment Engineering) ;
  • Kum Jong-Soo (Department of Mechanical Engineering, Pukyung National University)
  • Published : 2005.05.01


This study is to investigate effects of thermal conditions on sleep. Five female university students participated in the sleep experiment. Three temperature levels (22, 26, and $30^{\circ}C$) were given, and relative humidity was maintained to $50\%$. When as subject arrived in the chamber at 9 o'clock in the evening, questionnaire was given to check physical and psychological conditions. After checking conditions, subjects went to bed till 07 : 30 in the morning. Body movement was checked during sleeping. After sleep in the chamber, questionnaire was given to the subject in order to check sleep quality. Subjects evaluated sleep quality by themselves by answering the time they fall asleep and wake up, frequency of wake during sleep, causes of each waking, and feeling after sleep. Sleep quality was rated with 7-point scale. At $30^{\circ}C$ condition, body movement was significantly higher than of other thermal conditions. The best sleep quality was obtained at the $26^{\circ}C$ condition, while the worst sleep was taken at the $30^{\circ}C$ condition.



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