It's weird these might help with sleep.

Some other day it could be a recording of ocean waves washing over a beach.

(Actually...instead of...

https://www.rottentomatoes.com/m/what_we_do_in_the_shadows)

"What We Do in the Shadows: Season 1"
https://www.rottentomatoes.com/tv/what_we_do_in_the_shadows/s01

"Bite of the Tasmanian Devil"

https://youtu.be/iyvPjn2m240

Almost like angry cats?

"What do.....sound like"

https://youtu.be/pW27vpK4ALQ

That is just how they live.