There is an entire industry around this effect. https://en.m.wikipedia.org/wiki/Ganzfeld_effect https://en.m.wikipedia.org/wiki/Ganzfeld_effect https://mindpl

There is an entire industry around this effect. https://en.m.wikipedia.org/wiki/Ganzfeld_effect https://en.m.wikipedia.org/wiki/Ganzfeld_effect https://mindplace.com/products/kasina-ganzframes https://mindplace.com/products/kasina-ganzframes Basically Sound and Light "Mind Machines" have been utilizing this effevt for decades.