We have investigated effects of hearing the 1/f fluctuation sound source in ultrasonic range on the automatic nerve activity (the parasympathetic nervous system). At the moment, it show the possibly that 1/f fluctuation sound in ultrasonic range has some effect on the automatic nerve activity. However, it is yet to reveal the parameter of the 1/f fluctuation signal sequence (period, fluctuation width, modulation method, etc.,) that have effect of making the parasympathetic nerve activity predominant. In this study, we investigated the relationship between the modulation method (the frequency modulation) and the parasympathetic nerve activity. As the result, the 1/f fluctuation sound source in ultrasonic range generated by the frequency modulation cannot swear to make the parasympathetic nerve activity predominant.
Biomedical fuzzy systems bulletin
Proceedings of the Annual Meeting of Biomedical Fuzzy Systems Association : BMFSA
