This can be many things; can you tell me if it is front or rear of the car? Does it change when the car is in a turn? It sounds like the front bearing hubs are bad which is common. Here is how to change them out. This guide can help as well:
Can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response. We need to hear the noise, so we know which direction to go to help you fix the car. It takes time to upload so please be patient. Check out the images (below). Let us know how it goes.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.