Thanks so much for creating and sharing this! Could you point me to any other independent research in this area? Also, as I read related journal articles, I'm trying to understand if the 40Hz sound is binaural (with a 40Hz difference between frequencies in each ear) or a straight 40Hz pulse (same in both ears). It's surprisingly hard for me to get a clear answer. Do you happen to have any experience with this or suggestions for related resources that might contain the answer? Thanks!