If it’s very intense I leave a scenario. I get so inwardly frustrated I may implode before I get a chance to explode.
I notice I shake my leg as a habit in situations I am trying to cope with, to the point I get on other peoples nerves. When people are eating, I will stick fingers in my ear, hum a tune out loud and sing a song in my head, I will also avert my gaze from the person who is making the noises directions.
I also cope by glaring at people making the noises, whilst they are not looking. This has not yet produced a successful solution.
Like Kat I try to have mindfulness but I even struggle with the sounds of children eating. And who is more innocent?
I am currently finding this very amusing to admit these things out loud as I seem altogether ridiculous and unforgiving.