That would be really helpful :) Thanks a million for your help.
Also the walls are pretty thick, concrete, but I do believe the sound leaks from the door, and did I mention that I am using the apple earpods that wake up my brother sometimes :D
as conquerator2 said I guess its also a matter of opinion, but the with leather/pleather is that they cause my ears to heat up and sweat after a while, but that's just me I guess, but lemme ask with an open headphones you can hear the mouse clicks ? I thought the outside noise had to be pretty loud to hear it.
Open headphones offer the least isolation. I have a pair of open cans and I can literally hear everything when there is no music playing. When there is, you shouldn't be able to hear much, but you still can hear some noises, depending on their intensity.
Bottom line is that you want to have silence around you mostly, when you listen through open headphones as the isolation really is little to none. Night and day compared with IEMs/Closed.
Sound leakage depends on how loud you listen. When you crank it up noticeably, they can easily sound like little speakers turned down a bit. So, they can generate quite some noise. All I know is that it can be heard through twos sets of doors [one wooden, one glass/wood] when I crank them up but it depends on the hearing and one's sleep deepness.