Adjustment of Interval of Voices in Cognitive Shuffle Method by Body Movement Feedback with Binaural Sound

Insomnia remains a severe problem in social and personal. Sound and music have been used to solve the problem. Cognitive shuffle is one of the insomnia treatments by using voices for shuffling the user’s thoughts. The purpose of this study is to propose a method for adjusting the interval of voices used in the cognitive shuffle method. Based on the hypothetic arousal level of the user estimated by body movement, the interval is determined. When the arousal level was lower, the intervals were set longer. A feedback system was constructed to investigate the proposed method’s fundamental efficiency on sleep. A sheet-type pressure sensor was used to measure the user’s body movement. Moreover, the binaural sound was used to create voices in the cognitive shuffle method. The comparing experiment was conducted with a sound condition with the proposed method and control with no sound. As experimental results, a marginal difference was observed between the two conditions in the number of body movements. No significant difference in subjective sleepiness after the experiment was observed.