9am sounds early to me.
Having said that, my downstairs neighbour had a go at me this morning because she says our children make so much noise in the evening that hers cannot sleep.
We live in an apartment block where noises carry very badly (we were party to all the night time arguments of our divorcing upstairs neighbours and, now that they have gone, to late night music of new neighbours).
Our children are not particularly noisy, but they don't go to bed at 8.30 pm like the children beneath us. That is the crux of the matter.