I remember reading in Why we Sleep[1] about devices that you could wear which would increase the intensity of deep sleep brain waves, thereby causing deeper sle

I remember reading in Why we Sleep[1] about devices that you could wear which would increase the intensity of deep sleep brain waves, thereby causing deeper sleep. Not sure how legit this is seen these days or how close such devices are to becoming available to regular consumers, but was interesting to read about. [1]: https://en.wikipedia.org/wiki/Why_We_Sleep https://en.wikipedia.org/wiki/Why_We_Sleep