The Most Annoying Sound in the World

I love EMS work, I really do.  I'm even training to become an EMT, and am interested in doing it professionally.  I really love helping people and caring for them until the doctor takes a whack at it.  But there are some times, like: trying to sleep at 3 in the morning, intimate romantic and/or sexual conversations with your partner, about to finally beat Baramos in DWIII on your own (I never did), eating a feast, even during a wedding; when the pager kind of sounds like this...