When I am driving, say, 10 mph or less, I can hear this sound coming from the passenger's side of the car. I don'r really know how to explain besides that its like a crunching sound and happens with tire revolution. so the faster i go, the more the sound comes, and probably when i am going more than 10mph, i just can't hear it because of the wind and engine

 

if you can replicate the sound at slower speeds, get the car on jacks, place car in nuetral, spin the tire and see if you can find where the sound is originating from. Hopefully not the brakes.

 

It cant be the rear brakes, because I literally just replaced them four minutes. New rotors and pads. It sounded like it was coming from the rear side, though. It was making the sound before I had new brakes and as well as now

 

There's many reasons to your problem. First, it could be a defect tire from where it's coming from, cause I had a similar problem, there could be bald spots on the tire(s) or a bulge. I think you should visually inspect your tires. Second, maybe your axle nut(front or rear) is coming loose. Third, maybe your lug nuts is not torque correctly. Etc., etc., etc., if I were you check all the parts and make sure they're ALL tighten, and the parts looks good.

 

It kind of sounds like the tire issue, 'cause its more rubber-y than anything

 

Then, I think you should visually inspect your tires carefully. If you don't see any imperfections on it, then, maybe, just maybe you need to balance your wheels. If I were you, take it to one of your Tire and Wheel store and have them check out your tires and wheels, and explain to them what problem(s) your having. Good luck.

 

what? like Tire Kingdom? I can try, it's just hard to describe, and when I had my car up on jacks spinning the rotor (when I was changing it) hear the brake pad squeal, I couldn't hear this sound.

Also, another sound that my car is making and may be related is, there is a heavy knocking against my foot as I accelerate, and again, the faster I am going the harder/faster its knocking