Newish neighbours upstairs (3 months) they have a young child/baby (couldn't tell you as we haven't actually seen the child or the parents) the child cries and cries and cries through the night and often during the day too. I can't imagine how stressful it must be for the parents however, none of us can get a normal nights sleep, my 2 flatmates and I get woken usually 2 or 3 times because of this crying which is often accompanied by strange heavy footing (sometimes sounds like running) upstairs throughout their flat. They leave the windows open so the noise travels, it's actually getting to a point where I've been staying at my partners place more during weekdays to avoid this noise despite the commute to work being far longer. My other flatmate has been staying with her Grandma too. It's becoming unbearable. I understand its out of their control and I understand teething etc can be a difficult time (if that is whats going on) but would it be unreasonable to request they shut the windows and try and contain the noise to one room and stop the loud thumpy noises? If its not, could anyone suggest what would be the most polite and non judgemental way to approach them about this? I wouldn't want to upset or add to their stress but I feel we've let it go on for awhile now with no improvement.