A short spoken segment (YouTube lecture/transcript) explaining how vocal sound regulates the nervous system: activating the vocal cords stimulates the vagus nerve, promoting a parasympathetic (calm/grounded) state. It also describes the entrainment effect of chanting—synchronizing brain waves and shifting from active beta toward alpha and theta meditative states.
Chapters
Sound as a nervous system regulator, as getting our nervous system into a greater resonance. When we activate our vocal cord, we're activating our vagus nerve. And the vagus nerve is nerve that gets us into a parasympathetic state, shifts us out of a sympathetic or the fight and flight state. So that's helping us to get into a grounded and calm state. That's why a lot of the time, you might notice that humming or sighing, even all those things that activate sound in the vocal cord, can actually help to create that great state of release and calmness. There's also what's called the entrainment effect, which is when we chant, our brain waves actually synchronize with the rhythm of the sound. And so we kind of get into a meditative and an expanded state of consciousness. A shift from the beta, which is the more thinking, to the alpha, more calmed focus, and even more into theta. Deep, meditative brain waves.