Squeals of static and officers' voices that sounds autotuned on my police radio. Annoying enough when I was in detectives and the radio sat on my desk or on a belt clip but now that I'm wearing my uniform every day, the mike (and speaker) is on my shoulder next to my ear and the bursts of static (which we were told would be a thing of the past after our new umpty-zillion dollar digital radio upgrade for the entire metro area - ha!) are really making me grit my teeth. No wonder I've been having headaches.