Specifically, the sound any item makes when you "pick" it up. Like when you click on something and you're to move it, it makes a sound normally (like the clink of metal, the rustle of stone, etc). Or when you loot it, same thing.
But the noise ceases for me now. I logged out and back in, and it worked, for a moment.
I also noticed music getting all garbled in places, such as the Shrine. And some noises being way too loud (i.e. dragons I can hear from far away, seemingly. And the skinners at the Kor'kron meat camp).
Some noise ceases, I should specify. Sounds like my mount's movements, spells casting, those work.