My study of these energies so far points toward body language, posture, empathy, intentional breath, hypnotic trance and synesthesia as being the major drivers. The calmer you are and more relaxed you are, the easier it is to sense. I've read theories around how the nervous system normally deals with too much background noise, and by calming the mind you can free up bandwidth for the esoteric. I'm not convinced of there being any relation to the EM realm and as I'm sure we all know, psychedelics seem to increase one's sensitivity to these things.