It might work both ways. I was hearing voices quite clearly as I was flying over that area. It was so clear that at first I thought it was something being picked up by the speaker. Then I figured I was somehow hearing a conversation in a nearby gondola. Now I'm not so sure.A word of warning, just before entering the Riviera station from CBR station, anything you say inside the gondola can be heard on the beach and walkway before.
As I mentioned in an earlier post, noises from the ground, like traffic, air conditioning units, and construction, are clearly audible and even sound amplified.