My job does it weekly. It's a massive factory too, so the alarms are absolutely ear-splitting. They make a big deal out of safety, and wearing ear protection out on the production floor when I go out there, and all this other stuff, yet on a weekly basis they're absolutely shattering my ear drums. Love it.
We need louder sirens to counteract the hearing damage caused by our old sirens.
Maybe they must be so loud because people wear hearing protection?