I've heard and read about the 10hz frequency inducing altered states of mind [0]. I've also heard anecdotally that both water and fire resonate/flicker at 10hz,

I've heard and read about the 10hz frequency inducing altered states of mind [0]. I've also heard anecdotally that both water and fire resonate/flicker at 10hz, which is why people focus and get lost in flame and water. [0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4990355/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4990355/