[Jeepman]

Ever experience Helmholtz Resonance with your vehicle? I have and it's not a pleasant experience. Likely not good for your vehicle's headliner either.
At highway speed, a front seat passenger opened the window and the effect on the Driver's side was a vibrating Wub, Wub, Wub. I remember experiencing that as a kid, and over the years, when somebody opened the rear windows.

Another Auto Design Fail: The Helicopter Effect, a.k.a. 'Side Window Buffeting,' a.k.a. Helmholtz Resonance

Another Auto Design Fail: The Helicopter Effect, a.k.a. 'Side Window Buffeting,' a.k.a. Helmholtz Resonance - Core77

Earlier I griped about how the act of getting in and out of a car, a very basic automobile experience, is often neglected by designers. With the exception of the Tanto we looked at, there aren't many examples that demonstrate designers are really thinking about the problem and/or have the...

www.core77.com

Explained: That Weird Throbbing When You Open One Car Window

Explained: That Weird Throbbing When You Open One Car Window

Why is the wind buffeting so bad when one window is rolled down in your car?

www.caranddriver.com

You Can't Drive the Toyota Supra With the Windows Down

You Can't Drive the Toyota Supra With the Windows Down

With both windows down, the Supra's wind buffeting is unbearable. It's an infuriating defect that's particularly frustrating in a sports car meant for joyrides.

www.roadandtrack.com

 

[flyboy2610]

I don't drive with the windows down. That can really do a number on the headliner over time.

 

[LEVY]

Ever experience Helmholtz Resonance with your vehicle? I have and it's not a pleasant experience. Likely not good for your vehicle's headliner either.
At highway speed, a front seat passenger opened the window and the effect on the Driver's side was a vibrating Wub, Wub, Wub. I remember experiencing that as a kid, and over the years, when somebody opened the rear windows.

Another Auto Design Fail: The Helicopter Effect, a.k.a. 'Side Window Buffeting,' a.k.a. Helmholtz Resonance

Another Auto Design Fail: The Helicopter Effect, a.k.a. 'Side Window Buffeting,' a.k.a. Helmholtz Resonance - Core77

Earlier I griped about how the act of getting in and out of a car, a very basic automobile experience, is often neglected by designers. With the exception of the Tanto we looked at, there aren't many examples that demonstrate designers are really thinking about the problem and/or have the...

www.core77.com

Explained: That Weird Throbbing When You Open One Car Window

Explained: That Weird Throbbing When You Open One Car Window

Why is the wind buffeting so bad when one window is rolled down in your car?

www.caranddriver.com

You Can't Drive the Toyota Supra With the Windows Down

You Can't Drive the Toyota Supra With the Windows Down

With both windows down, the Supra's wind buffeting is unbearable. It's an infuriating defect that's particularly frustrating in a sports car meant for joyrides.

www.roadandtrack.com

Hey Jeepman, you are risking to be called dumb, but then again, you might not just because you are a SUPER MODERATOR and you know how some of those guys are.

Agreed.
Saying it does is one of the dumbest things I have heard in a while.

Good luck!

By the way, I couldn't have said it better myself (Actually I could.....).

 

[shipo]

In my Acura if I crack open the two rear windows I get the resonance, however, if I then pop the sun roof into vent mode, the resonance is immediately remediated.

I think every car I've ever had could be coaxed into the good old whup-whup-whup, but oddly enough, I don't think any of our four vans have ever experienced the phenomena. Regarding the cars in which the resonance could be induced, I've found judicious use of sun/moon roof venting and differential openings of other windows could always eliminate the issue.

 

[Sienile]

Caravan's have rear vent windows. Never an issue if they're open. Not much issue anyway until about 95mph (forgot to put the windows up before a drag).