Golden section, the optimization of environmental factors for human body / 中国组织工程研究

ABSTRACT

OBJECTIVE: Human body is closed in environmental physical factors.Using golden section, this study aims to find out the best condition of environmental physical factors acting on human body.METHODS: There are a lot of phenomena which have relation with golden section, for example, the environmental temperature, humidity, light frequency, sound intensity, atmospheric pressure, oxygen content, etc. Are in step with human sensation. RESULTS: ① Harmony between environmental temperature and human body Room temperature was maintained at 22-24 ℃, which was the golden temperature of human body (37 ℃). At this time, human felt the most comfortable. ② Harmony between humidity and human body When humidity ranged from 60% to 69% which contained the golden humidity of 61.8%, human did not feel both dryness and wetness. ③ Harmony between light frequency and human body Visible light with the wave length of 5.3×10-5 cm exactly stood at the golden point and was located in the area between yellow and green, I.e. Kelly light. Eyes of human had various sensitivities to each part of visible light. The further the wave-length away from kelly light, the poorer the sensitivity was; therefore, photosensitivity of kelly light was the most obvious, and human felt comfortable at the same time. ④ Harmony between sound intensity and human body Golden value from auditory threshold (0 dB) to pain threshold (120 dB) was 45.84 dB and 74.16 dB, respectively, which was located at normal area (40-60 dB),loudness area (60-80 dB) and region of musical sound. Musical sound had a great effect on cardiovascular system, digestive system, gland excretionand thinking activities. ⑤ Harmony between atmospheric pressure and human body If oxygen content was near to golden value, human felt suitable;otherwise, human would have hypoxia, irritancy, nausea and emesis.CONCLUSION: The best condition of environmental physical factors is optional. If the indexes, such as environmental temperature, humidity, light frequency, sound intensity, atmospheric pressure and oxygen content, are near to golden value, they will be harmonious with human body.