Super-hearing. Imagine if you really could hear conversations a block away, it can be hard enough discerning one conversation in a crowded room, imagine it being like that everywhere. All the rats and insects you will be hearing, the sound of people’s clothes rubbing together. Even if normally loud things aren’t deafening just focusing on one thing will be taxing.

Super hearing would essentially be tinnitus with some variety in the inescapable noise.