How do I stop fixating on the guy next to me at work who screams (in a very high, screechlike voice) everytime he's on the phone?

Or having a conversation with a co-worker?
I’m completely distracted and sometimes I’m driven to wearing my headphones and listening to music, which is also distracting…. I’ve complained a bunch of times. I’ve asked to be moved. I’m beyond annoyed. I sit here all day frustrated and I’m going to get high blood pressure. Do I quit over this?