Comprehensive Effects of Temperature, Relative Humidity, and Illumination on Sleep Quality
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This study investigated the comprehensive effects of temperature, relative humidity, and light intensity on sleep quality by the method of objective physiological parameters measurement and subjective questionnaires throughout the whole night. According to the orthogonal experimental design method, nine groups of experimental conditions were obtained by combining temperature (17, 20, and 23 °C), relative humidity (40, 55, and 70%), and light intensity (30, 90, and 150 lx). In each condition, electroencephalogram (EEG) was recorded during the whole night. In addition, subjects reported the questionnaires related to environmental sensation and sleep quality before and after sleep. According to the results which were given by subjective questionnaires and objective data, the indoor environmental parameters have effects on different degrees on sleep quality. Especially, temperature is the main factor affecting sleep quality. Meanwhile, the study also gave their comprehensive optimal conditions, which is the temperature at 20 °C, relative humidity at 55%, and light intensity before sleep at 150 lx and at 30 lx before waking up.
KeywordsComprehensive effect Sleep quality Orthogonal experimental design
This work was supported by the National Key R&D Program of China (2018YFC0704503) and National Natural Science Foundation of China (51478260 and 51778359). For informed consent, it was obtained from all individual participants included in the study.
- 3.Pan, L., et al.: Investigation of sleep quality under different temperatures based on subjective and physiological measurements. HVAC&R Res. 18(5), 1030–1043 (2012)Google Scholar
- 7.McNair, D.M., Lorr, M., Droppleman, L.F.: Revised Manual for the Profile of Mood States. Educational and Industrial Testing Services, San Diego, CA (1992)Google Scholar