Walking down the corridor from parking to the terminal at DCA, there is a cacophony of "caution -- the walkway is ending" all the way through.

Some airports are more filled with recorded announcements than others.

At almost all airports in the USA, there is a recorded voice every 5 or 10 minutes "your attention please...unattended luggage may be confiscated for inspection, and may be damaged or destroyed"

Then there is the "do not accept items from unknown persons" message, and the "do not smoke in the terminal" message and the "report suspicious activity to airport police" and the "only persons with a boarding pass may go to the gate". What am I leaving out?

Again at IAD, the mobile lounges for a while would have a loud recorded voice telling you about what a great thing the mobile lounges are. On the generic rental car bus in SFO from the airport to the rental car place, there is a loud recorded voice that is exceptionally hard to talk over.

What recorded messages do you hear at airports?