The alert sounds are a bit loud on the flight deck to be honest, I know they are supposed to get your attention but some of them are a bit OTT really. When I am sitting down the back I am always a bit suprised how well they carry into the cabin through the very thick door.
It was strangely quiet on that 2 engine plane across the Atlantic!
Not as quiet as if there hadn't been enough oil I suppose. Keep RT for pilots and ATCOs and the latest Hugh Grant or James Bond for the passengers I think.