In this study, a subjective experiment was conducted in a climate chamber to evaluate the effects of improvement of thermal and noise environment on productivity. The chamber was conditioned at operative temperatures of 25℃ or 28℃ with and without traffic noise. The subjective symptoms of fatigue increased as the experiment proceeded and as the subjects finished more sessions of task. The rate of the concentration of total hemoglobin increased when the subject performed the task. The results from this experiment showed that when the concentration of total hemoglobin increased, the number of correct answers and the predicted performance before environmental improvement were lower.
