Trust me it is! If continue making this aeroplane sound and not only on certain surface...confirmed liao.. To check, the mechanic will jack-up your car and feel the vibration when the manually turn the wheel.. If vibration can be feel, confirm whell bearing kaput dy. Civic 8th gen suffered from wheel bearing problems on the rd yr of ownership. This is very common and lotsa workshops knew it wth so many Civic Gen 8th came in & complained...

BTW, for 8th Gen civic, esp wth Hydraulic power steering (1.8)...better change the power steering fluid every 50K km bcos that also another fast kaput parts..I got qouted >RM3K to replace my whole system!! I din changed the fluid since day one till kaput on the 4th yr!!    ...The hose itself cost me RM1300 to replace last year & I have not change the pump yet!!

p/s: BTW, power steering kaput symptom also having the almost similar humming sound!! ...Replacing to 100% leak free fluid help in reducing the humming sopund & also the leak. I sold off the car b4 getting the power steering replaced..phewww..lucky..