[Kirye1337]

As the title states, im getting this weird subtle but noticeable sound when driving by buildings or other cars. I know it's not a rock or rocks stuck between the rotor and the shield. My dad's previous 2015 ford focus SE made this exact same sound and I have no clue what it is but is driving me nuts. Any thoughts?, it's going in soon for timing correction anyway so i'll get them to check it out too. Some insight would be great as im new! Thanks