my friend put this on my Facebook page, thought I'd share it. I don't find it the least bit surprising... I've always found their sound very soothing anyway. I used to keep a box of them in my bedroom (food for an old pet) and they used to sing me to sleep.
http://truthseekerdaily.com/2013/11...-the-track-and-it-sounds-like-humans-singing/
http://truthseekerdaily.com/2013/11...-the-track-and-it-sounds-like-humans-singing/