Hitting a curb or something can do it, but then it's almost always one front wheel, or they were not properly greased when installed or too much torque spindle nut(s) (It's VERY low)when rotors changed which will definitely fry them.
The sound you hear is likely coming from the bearings in the wheel hub. When the bearings are worn out or not properly lubricated, they can create a humming or grinding noise that gets louder as the wheel rotates. It is important to have the bearings inspected and replaced if needed to prevent further damage to the wheel and ensure safe driving.
Bad wheel bearings
Probably wheel bearings or wheels are unbalanced
check your wheel bearings
Signs that indicate it's time to replace the bicycle front wheel bearings include excessive noise or vibration coming from the wheel, difficulty in spinning the wheel smoothly, and visible wear or damage on the bearings themselves.
Check tire balance or wheel bearings in front axle
Common causes of MTB tire wobble include loose spokes, misaligned wheel, or worn-out bearings. To fix it, tighten the spokes evenly, align the wheel properly, or replace the bearings if necessary.
bad wheel bearings
To change front wheel bearings on a 1976 four-wheel drive GMC Sierra, you have to use the proper tools. Either by a mechanic or yourself; but you are required to know the basics. Being that these bearings are sealed and cannot be repacked with grease. It is important to replace the worn bearings, with the new ones. Before they damage the hubs.
Wheel bearings are the most common for causing a vibration.
Worn wheel bearings. First sounds like a whine, then increases to a hum, then a growl. If the bearings are not changed, it will affect/damage the axle, which costs more to repair/replace than the bearing. Some axle replacements also requires alignments following.
Wheel bearings help your wheels to roll smooth and fast.