As we all know, there are some accessories that have sounds with animations (same with costumes), but there are some that don't.
Accessories WITH sound: Valkyrie Wings and Dragon Wings. I think that's it.
Costumes with sound: Steam Knight Mask. I think that's it.
My small suggestion is to give some accessories and costumes (maybe certain armors) sounds, such as: Sniped Stranger Hat (snipe sound), Monster Pockets (appropriate sound), Wolver Tails, Cat Tails, Mercurial Demo Suit, Flame Aura, Haunted Aura, etc. Basically, items that have animations that could go well with sounds. Make them fairly quiet, of course, so they're not too distracting.
I would also like to suggest onto this idea, an option in the menu to turn these sounds off. I personally find the steam mask sound quite annoying, and after long periods of time, the wings are too.