The barking dog comment was just an observation , it would in any event seem logical for Airbus to have redesigned the 'power transfer unit' that cuased that noise.
In fact as was pointed out I would agree that the NEO noise was more obtrusive than actually louder, nothing too negative, certainly wouldnt put me off flying on one again and of course the engines are different. i suppose one just gets used to the pattern of new aircraft /new engines less noise.
Certainly got off the ground at LHR quickly but if it can cross the pond then a quick trip to Prague even full isn't going to be a challenge is it