Rainne, i often hear people talking when i go to bed. I sleep with a fan on and i start to doze off i hear all sorts of things from the vibrations of the fan. The minute i turn it off the voices stop. Also i have thin walls in my apt. and i hear the cat run upstairs, the couple in their bed talking, moving around, talking on the phone or their playing their music. These are just a couple of things to think about, tc