1994 Toyota Camry Humming noise in front suspension

Start by doing this:

Raise car, put on stands. Grasp tire and push/pull both horizontally and vertically, if any movement then possible wheel bearing, ball joint, tie rod, control arm bushing.

Check CV boots for any signs of leakage or cuts/rips in rubber boot.

It is also possible that it is the tire. If the above checks out OK, the move front tires to rear RF to RR and LF to LR. If noise moves to rear, then tire is problem.