Are you really sleeping then? I thought the point of sleeping was to wash away the buildup of plaque (amyloid?) in your brain. IINM the inability to get rid of it is one of the reasons for Alzheimers and dementia.

I would really like to know what they measure and how it compares between users and non-users of this ultrasonic tech. Disrupting brain functionality to be quasi awake might not be the smartest thing to do.