Need 2005 corolla help!!!!

There was a loud humming noise (in vehicle) in my Corolla for the past two weeks and kept getting louder and I thought it was because I needed new tires. I just put on four new tires and the humming noise is still there but not as loud. What would be the next thing I could check? I have to take care of my gas SAVER

 

Wheel bearing.

 

How would I check the bearings?
Just learning about the Tacoma but haven't read about the bearings on any vehicle.

 

What I would do is jack up each wheel and spin it and see if you can recreate the noise. Sometimes you can, sometimes you can't. Does it occur at any certain speeds? Straight, turning, or all the time?

 

When driving but I don't notice it being louder when turning. Just gets louder when I speed up.