id say type and size of tire, and if bearings are bad either or will make that humming sound.
1999 Mercury front and humming noises can because by several things. Tire noises are the most common cause. A tire that is not wearing properly can cause a humming noise.
Humming noise on the front passenger side of a 1997 Ford Explorer XLT may be due to a bad tire. Try to jack up the tire and spin it by hand to see if the noise is there.
Most commonly this is a tire wear issue
A hummingbird
Yes.
Could be a bearing going bad.
it could be your tires on the pavement.
you need a noise filter! go to your local stereo shop and tell em you need a noise filter.
Bad wheel bearing or there is a problem with the tire itself.
sounds like tire/road noise
I have heard that if you have papers or napkins in the glove compartment box they can get sucked into the air vent which then makes a humming noise that you can hear while driving and as you increase the speed the pitch of the noise gets louder.
Check the bearings.