Iwashige H., Ohta M., Ogawa H.

In general, the environmental comfortableness of the room is investigated by a kind of questionnaire. It seems that mainly it is based on a psychological evaluation method. On the other hand, the related physical environmental factor stimulus such as temperature, sound and illuminance can be measured directly by measurement instrument. It is undoubtedly a kind of physical evaluation. It is difficult to recognize good relation between two evaluation methods. We suppose it originates to some physiological change of human body owing to physical environmental stimulus related to the environmental comfortableness of the room. For making sure at least the measurement value of the physiological change, at first, we measured a heart rate, a capacity pulse wave of finger and an electrocardiogram when physical environmental factors stimulus is added. From these measurements, we found that a capacity pulse wave of finger is one of the effective method in explaining a physiological change of body. We made the experiments under the conditions of two kinds of sound level, three kinds of sound frequency band, three kinds of illuminance level and two kinds of room temperature. We obtained some reasonable experimental results of physiological change of human body by physical environmental stimulus. And also, we found that there was comparatively in good relation to the result of the psychological evaluation ( such as magnitude estimation method and semantic differential technique. )