

As a result, we determined that the combination of a 30:60 dB ratio of binaural beat to ASMR trigger is most effective for inducing theta power and psychological stability. In session 1, we combined two auditory stimuli (the 6 Hz binaural beat and ASMR triggers) at three-decibel ratios to find the optimal combination ratio. In addition, the “ASMR triggers” that cause ASMR were presented from natural sound as the sensory stimuli. Specifically, we used a 6 Hz binaural beat corresponding to the center of the theta band (4–8 Hz), which is the frequency at which brain activity is entrained during non-rapid eye movement (NREM) in sleep stage 1. In this study, we proposed a novel auditory stimulus for inducing sleep. To overcome this difficulty, we can exploit the feelings of calmness and relaxation that are induced by the perceptual phenomenon of autonomous sensory meridian response (ASMR). However, this auditory stimulus is uncomfortable for users to listen to induce sleep. When we listen to acoustic beats of two tones in each ear simultaneously, a binaural beat is generated which induces brain signals at a specific desired frequency.

One existing solution to this problem is to induce sleep using an auditory stimulus. However, the prevalence of sleep disorders is on the rise.

Sleep is important to maintain physical and cognitive functions in everyday life. 2Department of Artificial Intelligence, Korea University, Seoul, South Korea.1Department of Brain and Cognitive Engineering, Korea University, Seoul, South Korea.Minji Lee 1, Chae-Bin Song 1, Gi-Hwan Shin 1 and Seong-Whan Lee 1,2*
