even white or pink noise, can be useful when in a room with a lot of conversations going on; the sound helps drown out what they are saying, but my headphones still let me hear when something important is being announced
I was going to suggest classical music, as others have, until I read this. What kind of circumstances are you trying to read in? A room with noisy people in? If so, it's not surprising that you have concentration problems.
Perhaps you need to find a quiet space in which to read.
Otherwise, I'd recommend classical music.