[JDiculous]

I was replying specifically to the "in another you hear BUMP BUMP BUMP every 2 minutes" comment which seems to imply that trains must be above ground. In Manhattan, NYC you can hear the subway from the street and the noise pollution is awful (eg. ear-piercing sirens and traffic noise at all times), but it's not like that everywhere else.

I'm writing this from the 11th floor apartment in an apartment town suburb 30 minutes by subway from Seoul. It is dead silent. Very little traffic, and everything is walking distance. From above ground you don't hear the subway at all. Sound insulation in this apartment is pretty good so I never hear my neighbors (actually there's only 2 apartment units on each floor).