Research & References
(Yes there's a lot of research out there but when it comes to wellness, your own subjective experience is more important)
Vibration
Sound
Journal of Neural Regeneration Research
Frontiers in Psychology Journal
Pain Research and Management Journal
PEMF
Ocean
Purring
Singing Bowl
Schumann
Schumann Resonance, Brainwaves, Neuro-feedback and Beyond by Igor Nazarov, Ph.D. 2018
Gamma