Noise on highway

[Odo]

Hi guys, I'm an aussie and my Yaris Cross 2wd keep making noise while I go on highway (around 80-100 km/h) if I open my window(happened when fully open and a gap only). The noise is high frquency and very loud that I can't even hear my friend talking and keep make my sister's ear hurt. Is that just normal resonance frequency by the wind or is my window shaking? Anyone have the same problem ?

[anchorman]

1 hour ago, Odo said:

Hi guys, I'm an aussie and my Yaris Cross 2wd keep making noise while I go on highway (around 80-100 km/h) if I open my window(happened when fully open and a gap only). The noise is high frquency and very loud that I can't even hear my friend talking and keep make my sister's ear hurt. Is that just normal resonance frequency by the wind or is my window shaking? Anyone have the same problem ?

What you are hearing is the car inflating to a point where it rapidly deflates.  To stop it happening, just open a rear window a little way.   Just remember to shut it afterwards.