Someone here at Steemit did a blog about a month or two ago on something called ASMR. The woman in the video he shared was making clicking noises in her whispering. It was a strange experience for sure and wonder if it is connected. Here is a link to the post with the embedded video for you to check out from a couple months ago.
RE: Vril have a primitive language of gurgles and clicks, as do the alien occupiers in the movie Captive State.