Cool. I'm guessing, then, that the noise changes with the speed of the vehicle, yes?
Does it pull to one side at all? I see you mentioned above it doesn't drive like it needs an alignment, but how about if you get on the brakes really hard? Does it pull harder on one side or the other?
Of greater importance, with the wheel jacked up in the air (and car on jackstands), if you grasp the tire at the sides & wiggle, then repeat for top & bottom, is there any play? A buzzing/humming may indeed be a bearing.
Now, if you jack up the frame, set it on jackstands, then jack up the lower control arm so that the wheel is pretty close to ride height, what happens when you poke & prod all the suspension components? Can you find any play with anything? Use a crowbar and/or a rubber mallet. See if anything moves that shouldn't. Also, while the wheel is in the air, give it a good spin to listen to the noise while you're sitting right there - that may help you pinpoint it better than any of us can.
Good luck bro.
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08 Altima 2.5 CVT
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