In the cruise you can hear a jet pass overhead by 1000'. This when you have all the other noise in your own flightdeck and them at 'cruise' thrust.
At the airport, most jets do not use 'full' power for take off and that is pretty noisy.
By comparison it's not difficult to see why someone outside, or in a relatively quiet place, would take notice of a full thrust go-around directly above them
You could easily assume this was something to do with the height!