To investigate the relationship between refresh frequency and human visual comfort in lighting, an experiment was designed based on subjective emotion and physiological parameters. The impact of three monochromatic light (red 623 nm, green 537 nm, and blue 445 nm) and two different white lighting (3000 K, 6500 K) were also examined. According to experimental results, each lighting has a frequency that is most comfortable in the situation of non-static light. Although both dynamic and static light have an effect on human physiological parameters, it is clear that dynamic light causes more significant changes. A physiological analysis found that lower light flicker frequencies and red/blue flicker had the greatest effect on visual acuity, and that changes were greater in myopic than orthoptic eyes. The findings demonstrate that the refresh frequency of lighting has impacts on physiological parameters as well as subjective emotions.
An experiment based on physiological parameters and subjective emotional changes was designed to analyze the association of light and music. The different effects caused by music in major and minor were studied. Three mono-color light conditions (R, G, B) and warm-white in 3000K CCT and cold-white in 6000K CCT were evaluated in the same process. The experimental results showed that changes in the environment lead to physiological and psychological responses. Changes in all light colors and music had significant impacts on heart rate and respiratory rate. Analyzed with the valence-arousal of subjective emotions, it was found that music in major had a more positive influence on mood than music in minor, and white light had a more positive influence on mood than three monochromatic lights. A joint analysis of physiology and psychology found that the emotions stimulated by music in minor were most likely to be associated with blue light under low light level, while the emotions stimulated by music in major were most likely to be associated with the high correlated color temperature white light. The results confirm that light and music will influence both physiological parameters and subjective emotions.
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