When I was in high school, my math teacher would play Mozart during tests, claiming it would help us. It would drive me crazy, and I doubt that my grades improved as a result of the distraction.
For what it's worth, I have a BMus in Piano Performance. I love music... but never as "background noise"!
The closest thing I'll do to address my particular problem is find audio of stuff like thunderstorms or waterfalls and more ambient stuff. Personally, I find that much easier to tune out.
I do have noise canceling headphones and I like them, but they don't really do a lot for people talking.