Binaral beats are great for certain things, but not for PR/Studying because it becomes a crutch--just use the 3-2-1 method, tangerine technique, etc.
In answer to the other topic, yes it is entirely possible to remain conscious during deep delta waves. I personally have gone lower than 1 Hz and remained fully conscious. When you are in delta, your body gets very warm because of the blood circulation. For more info, look up "Feel the power" under topic in the Paraliminal forum.
