Humming noise
 

Hi there members.
I own a 2013 Quest LE. In the last couple of weeks i'm experiencing a humming sound coming from the front end once i reach apprx. 40 mph. Once i reach that speed or above, i've even tried shifting into neutral to disengage the powertrain to see if it makes a difference, to my disappointment, it does not. I've tried turning the wheel, applying the brakes, i even went under the car to see if i could find anything loose, nothing. Has anyone experienced this issue with their vehicle? Thanks