That is a sign of a bad wheel bearing. Have them inspected and repacked or replaced if need be. Note: these bearings are sealed and cannot be 'repacked' - like in the old days, or on rear drum brakes.
Note #2: the bearings are part of the hub/bearing assembly. An ambitious job, but certainly doable.
See "Related Questions" below for more
Bad bearings or bad piston rings
Humming, like the van doesn't know the lyrics?Seriously, humming is a common symptom of worn wheel bearings. Those are very difficult to diagnose - and not an easy do-it-yourself project - 8 on a 1-10 scale.I would suggest a tire shop, repair shop you trust to have them check the wheels out.See "Related Questions" below for more about what's involved in replacing wheel bearings.
id say type and size of tire, and if bearings are bad either or will make that humming sound.
the bearings
Possibly worn wheel bearings can create a humming or groaning sound.
bad wheel bearings
sort of like a humming? wheel bearings dude! if it starts humming at about 30mph and just gets louder faster you go, its the wheel bearings. and get used to it, i have blown 4 on my ion 3
bad wheel bearings
A humming noise on a 1999 Park Avenue is caused by bad wheel bearings. When bearings are loose or worn they will create a loud humming noise that will get louder and louder as the car accelerates.
could be your wheel bearings
bad wheel bearings will do that, usually in the front.
Where is the humming located front, rear? Could be a vaccuum leak if high pitched, wheel bearings, improper brake installation. More info needed.