| Popis: |
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. |
