Abstract
Abstract In many NIRS studies, the change of Hemoglobin is obtained with the sensory stimuli. In this study, acoustical stimuli was presented in random order. The subject was required to listen to the seven kinds of sounds (Speech sound, Machine noise, Stream sound, Commotion noise, Speech sound with machine noise, Speech sound with stream sound, Speech sound with commotion noise) from speaker. While it was listening to the sound, the subject had measured Blood volume (Total Hemoglobin) and Deoxy Hemoglobin in the frontal area. Deoxy Hb evoked by the Stream sound in this task is a largest for auditory stimuli in normal young adults. On the other hand, when there was machine sound, Total Hb took an influence. We also measured EEG. A % α power got a high result by the murmur of a stream sound. The result was assessed from the viewpoint of the foundation research, and it was shown that the measuring of Hemo-dynamics response and EEG might be useful for the sensory evaluation.
