Hi Its my Carmy 2011. I always hear a noise like bu-bu-bu ...... once driving speed is more than 60 mile per hour. I attached the record of the noise. Initially I thought its brake pads or rotor issues. but after changing to new ones. the noise is still there. Any experts can provide suggestion? Thank you!

 

The sound changes with vehicle speed or engine speed?
How are the wheel bearings?

 

Thank you for your reply. the noise become bigger as speed increase.
wheel are old, maybe it need to replace?

 

Your tires might be out of round, check them for uneven wear. This is a good place to start.