When I hear my chickens making a new noise I try to copy it, with variable results (and probably a lot of entertainment for the neighbours).
One of the most interesting ones was when they were going to bed in the evening and they made a distinctive "peouw peouw" noise. (When I made it back to them I had to make it quite nasal to get the right sound.) Anyway once I got it right they would stop going to roost on their perches where they had been roosting for weeks, and come over and jump up on something high near me to roost! I was very surprised at how effective it was.
I have a theory that if I ever want to change the place where my chickens roost I can either make that noise to call them over, or perhaps make a recording of their own bed-time noise to call them to the new roosting spot.