I was involved in a minor collision about 3 days ago, lady decided to pull out infront of me, so my passenger side light and hood got real messed up, but no frame damage, but I drove it home and to the body shop today and I noticed that the car had a deeper hum to it, it felt fine in the acceleration and all, but it had a deep hum when it hit like 4-6k, think airbox maybe?

 

It's very possible, the resonator is right in that area. Check that the airbox tubes going to the resonator in the well are still in place.

Also, if you got hit hard enough to change that, make sure your battery is still okay as well

 

I really didnt have a chance to look at it before I took to the body shop, but I saw some plastic pushing up, i bet something did happen, good thing its easy and cost effective to fix.

 

probably ur resonator. I removed mine and it hums too when accelerating. U don't really need it anyway if u don't mine the sound.