ok it sounds like you have tires that are cuped on the inside or outside edges, you can try and move the front tires to the rear and see if that has an effect if the noise moves to the back then you know its a tire issue, and you can either replace the tires and have an alignment check or have an alignment check and live with the noise, i dunno the severity of the noise so i couldnt make a suggestion in that respect, if the noise dosent change , i would assume there is a either a front wheel bearing or a rear axel bearing going bad.
Auto Technician
Ford Certified in A/C and Electrical Systems, Brakes, Gas and Diesel Engine Repair and SVT Certified