Est. read time: 5 min Sound healing gets filed under "relaxation" more often than it should. There's a real physiological process behind it — and a growing, credible body of research measuring what actually changes in the body during a session. The core benefits Nervous system regulation. Slow, sustained, low-frequency sound — from Tibetan bowls, crystal bowls, or gongs — tends to shift the body from a sympathetic ("fight or flight") state toward a parasympathetic ("rest and