I did a sleep study that was done at home. They just sent a device I clipped on my index finger, strapped around my chest and put a small tube around my nose.
It’s definitely still a little artificial, but it’s at home with no one live monitoring you. As long as you get some sleep they can use stats and all the various data to get an idea of what’s going on.
That’s why translation can be so hard, especially for poems, songs, comedy etc. Double meanings, metaphors, rhymes etc are often lost when translated.