Since the Hotend an part cooling fans are noisy like a turbine, i tried this remix with the very useful fan silencers on this page https://www.thingiverse.com/thing:3597687.
The result it's not a miracle, but less noise is always better.

Creality

Ender 3

Yes

0.2mm

doesn't matter, but I used 30%

The supports will be tedious to remove, I suggest you use the lowest temperature possible.
After all, the covers aren't a structural part.