Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Study of the Bioelectrical Signals and Subjective Response in Changing from Unpleasant to Pleasant Temperatures in a Learning Environment

학습환경에서 불쾌적온도에서 쾌적온도로의 변화시 생체신호 및 주관적 반응에 대한 실험적 연구

  • Im, Gwanghyun (Graduate school of Mechanical Engineering, Chosun University) ;
  • Kim, Jinhyun (Graduate school of Mechanical Engineering, Chosun University) ;
  • Park, Chasik (Department of Mechanical Engineering, Hoseo University) ;
  • Cho, Honghyun (Department of Mechanical Engineering, Chosun University)
  • Received : 2015.07.08
  • Accepted : 2015.08.12
  • Published : 2015.11.10
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Abstract

In this study, experiments using bioelectronic signals and questionnaire surveys were carried out in learning conditions when temperatures changed from low- and high-uncomfortable to comfortable. As a result, the stress factor Photoplethysmography (PPG) decreased, while the Root Mean Square of Standard Deviation (RMSSD) of PPG increased when the indoor temperature was changed from low- or high-uncomfortable to comfortable. Additionally, the absolute power of the ${\alpha}$-wave in the brain increased. According to the analysis of the association between the questionnaire and bioelectronic signals, the standard deviation of the stress factor as measured by pulse was closely related to the result of the thermal sensation questionnaire. In addition, it was found that the concentration on studying improved under comfortable temperatures when compared to uncomfortable temperatures.

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References

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