I used to have shared cubicle space with an ice cruncher. She even brought ice in from home to work, all day long, every day.
I don’t even like the computer game solitaire because of the sound of shuffling cards. Shuffling cards once is ok, but when you get all OCD and start shuffling them over and over, that’s enough.
Some people never learned how to chew gum and I’m assuming they are just as bad at eating food, or they crunch ice. Blowing a bubble then inverting it into your mouth as you pop is several times
This goes along with ice crunching, but there are some people who sound like they are eating rocks no matter what the food type is. The sound rattles around their skull until it sounds like they are breaking off their teeth at the gum line. Sometimes, you can hear people eating beans and the sound of the bean paste sticking to their teeth.
They have a great feel and feedback, but they sounds like marbles being spilled on a tile floor. It doesn’t matter if they are a great typist or a hunt and pecker, both are equally annoying.
Hearing someone speak who has a dry mouth is probably one of the worst sounds anyone can make. It’s even more tortuous is the person is speaking in front of a large crowd and is using a microphone.