The main issue that there is noise passes basically unimpeded. My living space is directly under my sisters room. She can hear my phone conversations. I leave videos on softly to fall asleep to, and the straw that broke the camels back was one woke her up in the middle of the night, and she had a big test in the morning. I certainly dont need her to hear me when Im jerking off.

I guess I should mention, due to the placement, there is a hot air register that passes between our rooms.