I made this part to reduce the noise of the power supply of my printer, but it didn't help much. I saw the idea here: https://www.thingiverse.com/thing:3328495, but I made this completely by myself, since it seemed to me more aesthetic.
As a silencer, this doesn't work, but it allows to take in air from behind the printer and it prevents to get dust inside.
You need reverse a detail position on your printing table, and print that on the top cap.
Plastic weight (approx): 70 g.
Clas Ohlson PETG
I used supports for mounting holes only.