We are hearing a subtle World noise it gets louder with speed especially on the highway it does not change when braking or turning. The sound is coming from the front driver side. I thought it sounded like an echo from the tire. it does not sound like a high-pitched screech. my brother-in-law thought it was a wheel bearing.  There are no marks on the disc brake. the lug nuts were very very hot after a short drive the caliper is not stuck either and there is no pulling