I've never been formally diagnosed, but I'm pretty certain I have vestibular hyperacusis, which is when certain sounds make you nauseous and/or dizzy.
Repetitious sounds are like kryptonite for me. Foot tapping, pen clicking, car alarms all go beyond annoyance. On night last summer, a car alarm went off for nearly 30 minutes inside a neighbors garage while they were not home (no idea why, maybe a pet stepped on a key fob or something). I started getting dizzy and felt like I wanted to throw up. I had to get in my car and leave.
When we had our daughter, I would put tape or some sort of muffling device on the speakers of some of her toys, because I couldn't handle it. I told people that if they wanted to buy a loud annoying gift for her as a joke, I would return or donate it. My SIL didn't listen, bought some obnoxious toy, and then got pissed when I asked for the receipt.
Oddly enough, I don't have an issue with loud noises like concerts or sporting events. The variety makes it fine.