Effects of indoor thermal-acoustic interaction on comfort and facial expression

While thermal-acoustic interaction is considered that to have an effect on comfort perceptions, the interaction effects of these factors and their impacts on perceived comfort and facial expressions have not been thoroughly investigated. In this study, the interaction effects between temperature and sound pressure levels on thermal, acoustics, overall comfort and facial expressions of young adults in offices were examined. The results showed that: (1) thermal-acoustic interaction and sound pressure levels had a significantly effect on thermal comfort, acoustic comfort and overall comfort; thermal comfort and overall comfort were significantly affected by temperature. (2) thermal-acoustic interaction had a significantly effect on the valence of facial expressions over a period from 20 to 60 seconds. (3) comfort perceptions had significantly correlations with several facial expressions.