Rep Power: 0

I can here a loud revolving sound at around 45 mph. I've tested that it's not my engine by putting it in neutral on the freeway. I've tested my wheel bearing and they seem fine. The serpentine belt looks fine. I'm not having any issues shifting. I checked my transmission fluid it looks fine and I checked my breaks. I'm running out of things to check before I take it to a mechanic. I also got a new exhaust a year ago and new breaks then too. My car just sounds loader than normal and I would love any and all advice

 
Rep Power: 366

you mentioned break twice, what was broken?