The Monroe Institutes Hemisync Process - Non-Fiction
Conclusion
"An extensive evaluation of Hemisync has shown that Hemisync provides a highly selective entrainment vehicle within the brain itself.
The selectivity of this vehicle can provide the user with a variety of states of consciousness and the fact that the vehicle operates within the brain itself insures its effectiveness." [1]
References
[1]
The Monroe Institute. Monroe Institutes Hemisync Process
https://www.cia.gov/readingroom/docs/CIA-RDP96-00788R001700210004-8.pdf