There is the potential that a wheel bearing my be failing. To tell, jack up the vehicle til a wheel is off the ground. Grab the tire at 12 and 6 o'clock and try to wobble it. Depanding on tire size, you may have to use a good bit of force to overcome the weight of the tire/wheel assembly. If there is any wobble to it, either the bearing is on it's way out or your lug nuts may be loose.
Try that at all 4 corners (emphasis on the front two) and see if you find anything. Please let me know if you need more help with this.
Auto Service Technician
ASE Certified Auto Tech, Undercar Specialist, 20+ years exp.