First, vsually inspect the belts to see if there is any damage.
Was the a/c on when you started the vehicle and heard the noise? If so, start the car again to see if the noise is there, if it is turn the a/c off an see if it has an effect on the noise.
If the noise stops when the a/c is off, suspect a loose a/c belt or a failing a/c compressor clutch.
Monday, June 24th, 2013 AT 5:26 PM