I live in a 20million+ city in China (we call 2million a village). Everything is concrete and overbuilt (walls, floors are thick); so noise for the units around you is fine. However, outside is another story: I've had many sleepless nights with construction outside, and delivery trucks with backup warning sounds...ugh. Right now is dance-in-the-square time, and I can hear whatever music the old ladies are dancing to pretty clearly!