If you have a place where you feel comfortable jacking up the vehicle, you might try taking a wheel off and rotating the hub to see if you can tell if it’s coming from the brakes or the wheel bearing itself.

If you’re having a hard time determining where the sound is coming from, you can remove the brake caliper and rotor to see if the sound persists.

I suspect a wheel bearing on the front drivers side of my wife’s 2005 Trailblazer, but no rumbling sound only a rotational scraping noise when the car starts rolling….the sound is akin to the rotor dust shield rubbing against something.

Check your wheels for clearance to make sure they aren’t rubbing on anything. If you can take a wheel off, that would be ideal. While you’re in there, check your brake calipers to make sure they can spin freely without any grinding. You may be able to find the source of the noise pretty quickly just by spinning the hub with the wheel off.

I have recently changed front wheel bearing(left and right both) but still hearing sound of grinding after driving 2 to 3 km while pressing race Padel. What is the problem?

That’s not good. I would check the wheel bearing, but even before that: pull the wheel off if you’re able to and see if something is caught in the wheel or brake caliper.