it could be your tires on the pavement.
it does that because it has a generator which makes the engine makes these sounds
humming noise is a bad ground to the radio. you may have a loose connection. connect a ground wire to frame of truck.
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.
Wheel bearing.
Bad wheel bearing
A hummingbird
There can be a slight humming noise while driving a neon. This sound could come purely from the engine to indicate that it is running.
because something is about to break.
Could be a bearing going bad.
id say type and size of tire, and if bearings are bad either or will make that humming sound.
you need a noise filter! go to your local stereo shop and tell em you need a noise filter.
No. The loud humming noise could be a wheel bearing going bad and it could damage the ABS sensor if allowed to continue.