Vibration and road noise?

I have been picking up a vibration and sounds that seem to follow. Its starts to get louder around 30 mph and fades out when I turn to the right or changes lanes to the right, and when turning or changing lanes to the left its almost twice as loud. I thought it may have been the tires, but I rotated the ones from the back with less than 5k mi on them to the front and it hasent changed. Anyone ever get this or know how to get rid of it?