I can give you a clue from the neighbours perspective - I lived in a double brick house with small windows and right next door was a double brick house with small windows - the neighbour played (and taught) sax. He was a pretty fair sax player, worked professionally (as a sax player you understand). What we were subjected to was a reasonable practice regime on his part but the bit that became a little annoying was the repitition from the students. The same pieces, the same mistakes. But it's amazing what a neighbour will bare, if you are pleasant. Talk to your neighbours - they might just be humans.