I had a chance to stop by at service today and speak with one of the reps, he came out and listened to the sound, from what he said it might be either an exhaust flap or issue with exhaust baffle. Nothing that needs immediate attention but something that needs to be looked at. The exhaust flap can be somewhat inexpensive fix where the baffle can be expensive as it will require replacing the exhaust.
I guess I will bring my car for appointment one of this days and then I'll know for sure.
Thanks for reading!