Helicopter Sound at 40-50km/hr

[dr. d]

update: front wheel bearings replaced; alignment, balance and rotation done. unfotunately the humming helicopter sound is still there. also kanina medyo na may slight vibration din sa steering wheel na nasabay sa humming sound. help please. running out of ideas and budget.

it still sounds like tire problem.
err... how old are your tires? are you the original owner?
if you are not the original owner, is it possible that the previous owner already rotated the tires because he already experienced the helicopter phenomenon earlier before he sold the car....?