It could be the passenger side hub/bearing assembly is bad. I wouldn't drive it any further than the closest garage for repair.
More then likey it is either the left are right front wheel bearing that is bad.
Worn right front wheel bearing.
if its when you are breaking it is possible it could be a rotor if you hear like a roaring or grinding noise coming from that side also could be a wheel bearing
A roaring sound is usually caused by a worn out wheel bearing.
Wheel bearing
I think it's called an engine
Bearings misassembled, tire nosie, brake noise, noise in axle, noise in transmission, etc.
Your front pads are most likely gone on at least one side-check them.
It could be one of your front axels aka cv joints. I have replaced mine three times.
that is either your front right wheel bearing or your coil spring is turning need new suspension..$$$$
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.
Sounds like it could be a bad wheel bearing