Im not using beep as a replacment for a curse word either. I mean an actual beep. Tuesday night i was awake from 3:30-6:00 in the morning becuase of a peircing unexplainable beep. It went off at 30 second intervals and DID NOT STOP.
I went from this-
Cotton wool in the ears
Head band for further sound insulation
A t shirt over both
Still didn't work. In the morning we found out it was the carbon monoxide alarm. It's now in pieces on our landing.