Someone walking in a pretty crowded place with people talking in the background.
People are milling around in an airport and muttering to themselves as they cart screeching luggage around. People are talking at an airport and rolling their screeching luggage around. Someone is walking in a busy place as others mutter in the background. Someone walking in a pretty crowded place with people talking in the background. The crowd seems to be at a distance but starts to get louder.