Cstep is absolutely on target with saying for electronic devices (like televison for sleeping) there are individual needs and differences. I do have some experience I'd like to share, Zarb.
As I said above, my sleep is very soothing and enjoyable when I listen to the "babbling brook" station. However, I cannot say the same for my own "regular" TV.
According to my dream journal, when I have fallen asleep with regular programming on in the background, the content was so audibly powerful that it entered my dreams. The content was rather disturbing when it "suggested itself" into my dreams at times.
So far I have been in Donald Trump's office where people were loudly protesting right outside the door. The protesters were blaming me for things he had said, so this was challenging and weird. Then there was the amusement park ride that went crumbling to the ground when my family and I were stuck at the top of the ride structure.
Okay, so I was on a binge...re-watching The Sopranos for my annual pilgrimage. Tony Soprano and Paulie Walnuts were hunting me down for money I owed for a high-rollers poker game. I'm super grateful that I woke up before being whacked. (OMG, and the next night it was the Paulie "espresso episode!") Priceless!
So the moral of the story is: Some people's dreams are definitely influenced by what they hear during sleep. Have a little serving of babbling brooks, already!
Here's some great, calming music: https://www.youtube.com/watch?v=oYVhriSqlZY
Be well...Sleep well,