[voisin]

> NASA figured out the high pitched whine was the nervous system (like, your brain).

I’d love to know more about this if you have any info to share.

[jfoutz]

I wish I could find a better source. My memory is of a wired article, on paper. This touches on the "hiss" from the nervous system - https://www.americanscientist.org/article/quietest-places-in...

[codr7]

Nada Yoga might give some information as well, it's not a new idea.