As a kid in Australia a fan.
As an adult, a fan plus tinnitus

I was nearly always grounded from all electronics from 6-13 (autdhd, and authoritarian parents, bad mix), and had a bedroom with no exterior windows. My window went to a modified 3-season porch thing, in 2 of the 3 places (the third was an apartment for like 6mths, I barely remember it), and that’s where my mom slept, so… really quiet dead silence, mostly, else I was in trouble. Again. Or whatever garbage my mom had on tv, muffled through the wall.

Now I have tinnitus, so silence is really loud. I have aquariums tho and the hum and bubble of the air pump helps a lot (plus really loud circulation fans).

Hilary Duff CDs on loop. I felt like every song had something to relate too. Anytime I try to play them now and my friends tell be to turn it off.

Mostly nostalgia for me now. Remembering a time I had dreams.

Vin Scully(Dodgers), Dick Engberg(Angels, Rams), Chick Hearn (Lakers) and Jiggs McDonald(Kings) on my 9 volt transistor radio well hidden under the covers. So well hidden that it ended up switched off and in the drawer by morning.

Breeze, rustle of leaves, sounds from birds and insects. Fan if no breeze.

As a kid varius radio play cassettes like Benjamin Blümchen, Bibi Blocksberg, later the Star Wars soundtrack.

Nowadays various science shows on YouTube. Mainly astrophysics stuff. My favourites are Dr Becky, Harald Lesh and PBS Space Time.

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If you’re looking for bed time stories for adults (non-sexual haha) then I highly recommend the podcast “nothing much happens” by Kathryn Nicolai. She has an amazingly soothing voice perfect for bedtime and she writes her own stories! I normally knock out in less than 10 mins when I pop her on my podcasts now.

Hundreds of bullfrogs croaking the night away around a nearby pond. Now if I hear a bunch of frogs I get nostalgic.

When I was a kid I had a record player and usually played a particular record that had various artists on it Like Johnny Horton (Battle of New Orleans) and Elvis Presley (Blue Suede Shoes).

Now 40+ years later, it’s usually stuff like Frog Leap Studios (Leo Morrachelli https://www.youtube.com/user/leolego/videos) mainly so I don’t have to hear my cats screaming around the house in their nightly turbo mode.

I still like Johnny Horton, but anything from Elvis makes my eye twitch.

As a kid, it was the local oldies station for a while, then swapped to this long-form recording of ocean surf my parents had on CD.

These days a fan is fine, though I’ll put on rain or surf white noise, or ambient music, with headphones if I’m travelling somewhere & it’s noisy.

I don’t fall asleep listening to anything but my fan, but reading knocks me the fuck out most nights. Sometimes I can’t make it through a paragraph before catching myself with my eyes completely closed.

A radio either turned to an AM station far away to the point where it’s mostly brown noise with hints of someone speaking, or to some calm music.

Nowadays it’s mostly KnowledgeFight.

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I never played sleepy music until I was a teen, and every night I played Cake - Fashion Nugget. Great, mellow tunes, and I learned ALL the lyrics subliminally!

Ok, I did listen to it awake, so maybe it wasn’t completely subliminal, but it’s been a while and I bet I could still sing 80% of the album from memory.

Nowadays, it’s just the fan or AC running.

EDIT: I typed the wrong Cake album originally.

Silence, it was usually my pose rather than the background noise that affected sleep. When I sleep, I often look like I was carried out of the chamber of secrets.