Brain Activity Evaluation Using Oxy-Hb by Difference in the Strength of Sound Stimulus

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  • 酸素化ヘモグロビン濃度による聴覚刺激の強度差を用いた脳活動評価
  • サンソカ ヘモグロビン ノウド ニ ヨル チョウカク シゲキ ノ キョウドサ オ モチイタ ノウ カツドウ ヒョウカ

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Abstract

We carried out a psychological study involving physiological measurements. We used the VAS to research the feeling. The physiological factor measured was the oxy-Hb. It was found that an auditory stimulus of 70[dB] is more uncomfortable than auditory stimulus of 50[dB]. Furthermore, the decrease in oxy-Hb was greater for the auditory stimulus of 70[dB] as compared to the auditory stimulus of 50[dB]. This tendency was found in the center of the forehead (ch22-ch25). There was a difference between the brain activity for the auditory stimulus of 70[dB] and that for the auditory stimulus of 50[dB]. It was also found that the sound level affects the comfort level of humans. It is necessary to obtain additional details on the effects from physiological index to psychological index in a future study.

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