The condition is becoming known as misophonia. It is also been called selective sound sensitivity syndrome, 4S, phonophobia, and other names, but some of them describe conditions with similar features in that they are related to hearing or sound issues yet have different symptoms, causes, etc. For example, where a Misophonic will have an intense emotional reaction to sounds made by certain sources regardless of volume...someone with Hyperacusis experiences sounds at intolerable volumes. With misophonia, the emotional response stops when the sound does.
Sounds that can cause intense emotional reactions
At the link above, the "trigger" sounds are grouped under the following categories.
Mouth and Eating
Breathing / Nasal
Vocal
Environmental
Body Movement related
Visual (sound related)
Visual (not necessarily sound related)
I experience strong reactions to at least one thing in every category, if not more. I've been having these reactions since I was young - before puberty - and it began with sounds under the first two categories, then more developed from the others as I aged.
Due to the nature of many noises (such as eating and breathing, in particular), there is a feeling of guilt about being unable to filter out these sounds. I'm well aware that the individual can't help making the noise, and also that it's difficult for me to tune it out or not be bothered by it.
When I first meet you and in the first few months of being in each other's presence, I probably wouldn't say anything upon hearing these noises. If only I could keep tuning them out, but to be honest, I don't exactly tune it out. I can't completely. I seem to be hyper-aware of these sounds.
I just find ways of coping until I can be out of range - which is annoyingly long when it comes to sounds that disturb me and frustratingly short when it comes to things I need to hear, like someone trying to discreetly tell me something important at work over another continuous noise.
[Image from Misophonia Institute]