Zenyatta does pause when he hears the noise as well. It's far, and he has not scraped against a wall on accident or even shuffled his feet against the rocky ground. (Hovering does avoid having footsteps to compete with surrounding sounds.) His forehead lights cast his immediate area with a light blue glow; he turns to go in a direction further from the noise.

"Please be mindful up ahead. It appears the terrain turns rougher. I would hate for you to trip." And Zenyatta mentally thanks the spirit once more for returning his ability to hover. He would not be well equipped to travel the caves. This floor is far different than flat lands and stairs. No doubt Hope would have needed a different escort.