They all gather and watch me as I work with power tools (or a loud hammer!) as I'm constructing the new coop. The noise of the circular saw does NOT seem to bother them in the slightest. I learned I had to adjust the run enclosure fence to exclude them from the construction area, because they would actually flap up to the wood surface AS I WAS CUTTING IT with the power saw and come see what was throwing that sawdust everywhere. Lordy! Plus, any dropped nail caused a flurry of excited chickens dashing for it. Oh NO! Can't have them eating THOSE!
Even now, they will gather on the other side of the run fence close to where I work on something. They'll wander away if I go out of their sight, and when I come around from the back side of the new coop, or exit from working inside it, they all rush back to ask me chickeny questions about where I've been and what I've been doing.