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WEAR HEADPHONES.
The rumbling I think mimics thunder or a carwash :)
asmr relaxation soothing relax relaxing sleep insomnia sleepy Sleep Aid hands hand fingers Autonomous Sensory Meridian Response touching mic touch mic touch microphone touching microphone touching rumbling thunder sound vocal sound Vocal Sounds vocal sound sounds binaural stereo 3D Sound noise noises tingle tingles tingly Christmas holiday santa hand movements