While I don't think I have better hearing than anyone else (well, maybe a bit, I certainly prefer the TV and music turned down lower than the rest of my family), I do find certain sounds very annoying. Doesn't everyone? Apparently not. My husband can sleep through a dripping tap, no problems, while I lie awake. Sniffing drives me crazy. But the worst is the sound of someone eating. It's ok if I am eating too because then I can only hear myself, which doesn't bother me. But other people! Yuck! The sound of the food smooshing around their mouth makes me feel ill. My husband usually gets home too late to have dinner with me and the kids, and I'm sure he would like me to sit with him to chat while he has his meal; but I just can't.
And there is a name for this ... disorder!
COSMOS magazine says that misophonia has been recognised in the last decade, and describes the inability to tolerate certain patterns of sound. And they quote someone saying: "I can't handle listening to people eat," he says. "It's the chomping and clicking sound - saliva getting sloshed around in there." (p43)
So, there is name for it!