2000 Chevy Tahoe I hear an annoying noise. Please help.

I am hearing a noise in my car. It occurs on acceleration only, at almost any speed. It sounds like a maraca is being used and gets worse if I open the window. I am almost sure it is from the tires on the driver side, but I can;t tell if it is the front or rear tire. Could it be ball bearings? If so, how much might that cost, in general? Thanks!

PS-I took it to the repair shop and they claimed they couldn't hear it. I think it's gotten worse since then.