It's apparently not awful; it's variously reported at 60 to 76dB depending on where you look: https://www.geonoise.com/train-passes-through-an-apartment-buildin

It's apparently not awful; it's variously reported at 60 to 76dB depending on where you look: https://www.geonoise.com/train-passes-through-an-apartment-building-in-chongqing-china/ https://www.geonoise.com/train-passes-through-an-apartment-b... Although this paper indeed finds it can be a lot higher in the station: https://www.sciencedirect.com/science/article/abs/pii/S0378778822007150 https://www.sciencedirect.com/science/article/abs/pii/S03787...