Subdeacon Joe Posted March 28, 2021 Share Posted March 28, 2021 A something known as Helmholtz Resonance . When I opened the right rear window I started hearing a thutter and felt a throbbing, along with uncomfortable pressure on my ears. The thutter put me in mind of the UH-1s flying out of Camp Pendleton I heard as a kid . I thought that it might be a Tyre problem but they all looked good. Found out it is a common problem with aerodynamic cars. If you open just one window it ends up working like blowing across top of a pop bottle. Link to comment Share on other sites More sharing options...
Pat Riot Posted March 28, 2021 Share Posted March 28, 2021 My 2002 Chevy S10 will do that in the right conditions. It can be annoying. Link to comment Share on other sites More sharing options...
Rye Miles #13621 Posted March 28, 2021 Share Posted March 28, 2021 22 minutes ago, Subdeacon Joe said: A something known as Helmholtz Resonance . When I opened the right rear window I started hearing a thutter and felt a throbbing, along with uncomfortable pressure on my ears. The thutter put me in mind of the UH-1s flying out of Camp Pendleton I heard as a kid . I thought that it might be a Tyre problem but they all looked good. Found out it is a common problem with aerodynamic cars. If you open just one window it ends up working like blowing across top of a pop bottle. Yep my 2017 Buick Encore dies the same thing, annoying isn’t it? Link to comment Share on other sites More sharing options...
Sedalia Dave Posted March 28, 2021 Share Posted March 28, 2021 Thanks Now I know what that annoying phenomenon is called. Link to comment Share on other sites More sharing options...
Calamity Kris Posted March 28, 2021 Share Posted March 28, 2021 That is the exact reason I purchased a car with a moon roof. If I ever need to vent the hot air out of the car while the AC is doing it's best to cool it, I crack the moon roof and continue on my journey. I can't drive with the rear windows partially open as I used to because of that resonance. Thanks for putting a name to it. Link to comment Share on other sites More sharing options...
Sedalia Dave Posted March 28, 2021 Share Posted March 28, 2021 BTW, If you crack a window on each side it stops. Link to comment Share on other sites More sharing options...
Father Kit Cool Gun Garth Posted March 28, 2021 Share Posted March 28, 2021 I heard that just a little crack you'd become oblivious to any sound! Link to comment Share on other sites More sharing options...
Subdeacon Joe Posted March 28, 2021 Author Share Posted March 28, 2021 44 minutes ago, Sedalia Dave said: BTW, If you crack a window on each side it stops. Well, attenuates at least. We will have to play with what windows to open how much. We did notice that when our toy poodle had her head out the window the sound went away. Link to comment Share on other sites More sharing options...
Four-Eyed Buck,SASS #14795 Posted March 28, 2021 Share Posted March 28, 2021 Our Kia Souls do the same thing. Usually just lower a rear window a bit with a front down and it stops. Does feel weirdly annoying until you do the correction Link to comment Share on other sites More sharing options...
Badger Mountain Charlie SASS #43172 Posted March 28, 2021 Share Posted March 28, 2021 Thanks for identifying that noise for me. I had it with my 2008 Rav 4. Link to comment Share on other sites More sharing options...
Sixgun Seamus Posted March 28, 2021 Share Posted March 28, 2021 Does it with the crew cab F150 and the wife's Ford Escape. The Escape is the worst I've ever experienced with any of our previous cars. Link to comment Share on other sites More sharing options...
Dantankerous Posted March 28, 2021 Share Posted March 28, 2021 Jeep Wrangler, no top, no fluttering. Might be cooler or warmer than you want, but no fluttering. Unless your sea tbelt is whop whop whopping against the front seat... Link to comment Share on other sites More sharing options...
Utah Bob #35998 Posted March 29, 2021 Share Posted March 29, 2021 Yeah, the Outback does it but I think the Forester did it worse. But as mentioned, I just open the front window on the opposite side. Link to comment Share on other sites More sharing options...
Abilene Slim SASS 81783 Posted March 29, 2021 Share Posted March 29, 2021 All of my cars have done that for as long as I can remember. Link to comment Share on other sites More sharing options...
Subdeacon Joe Posted March 29, 2021 Author Share Posted March 29, 2021 It was something new to me. Never anything even close. Link to comment Share on other sites More sharing options...
Michigan Slim Posted March 29, 2021 Share Posted March 29, 2021 Wife's Impala does it bad. Hurts my ears. Link to comment Share on other sites More sharing options...
J.D. Daily Posted March 29, 2021 Share Posted March 29, 2021 Joe, When I started reading your post I thought to myself, "Nothing unusual for auto exhaust system to include a helmholtz resonator". They are very common on diesel & gas engine powered gensets to reduce the 1st order frequency noise. Link to comment Share on other sites More sharing options...
Cheyenne Ranger, 48747L Posted March 29, 2021 Share Posted March 29, 2021 3 hours ago, Subdeacon Joe said: We did notice that when our toy poodle had her head out the window the sound went away. be careful or the toy poodle will go away too Link to comment Share on other sites More sharing options...
Subdeacon Joe Posted March 29, 2021 Author Share Posted March 29, 2021 7 minutes ago, Cheyenne Ranger, 48747L said: be careful or the toy poodle will go away too I had it only about half way down. She could get her head out to sniff and look around, but that is it. Too slick for her to climb higher. We folded the 40% side of the back seat down and put her bed on it so I don't have to roll down the window all the way . When she stands on that she's fine. Lisa likes it because April doesn't want to stand on her lap or, ah, chest to get her face to the wind. Link to comment Share on other sites More sharing options...
Imis Twohofon,SASS # 46646 Posted March 29, 2021 Share Posted March 29, 2021 And I thought the noise was my ears flapping behind my head. Whoda thunk it? Imis Link to comment Share on other sites More sharing options...
Raylan Posted March 29, 2021 Share Posted March 29, 2021 Well, remember the old vent windows, gave ya more options. Link to comment Share on other sites More sharing options...
Forty Rod SASS 3935 Posted March 29, 2021 Share Posted March 29, 2021 8 hours ago, Rye Miles #13621 said: Yep my 2017 Buick Encore dies the same thing, annoying isn’t it? Both of my Impalas, a 2006 and a 2019 ( I still have it) did that if I drove with the right front side window open and exceeded 40mph. The '19 model has a lot more annoying things, like stupid messages popping up on the center screen at inconvenient times. Link to comment Share on other sites More sharing options...
Pat Riot Posted March 29, 2021 Share Posted March 29, 2021 12 hours ago, Raylan said: Well, remember the old vent windows, gave ya more options. I miss these. My 93 Ford F-150 was the last vehicle I owned that had vent windows. Link to comment Share on other sites More sharing options...
Four-Eyed Buck,SASS #14795 Posted March 29, 2021 Share Posted March 29, 2021 Vent windows were SOOoooo handy for a myriad of things Link to comment Share on other sites More sharing options...
Captain Bill Burt Posted March 29, 2021 Share Posted March 29, 2021 17 hours ago, Four-Eyed Buck,SASS #14795 said: Our Kia Souls do the same thing. Usually just lower a rear window a bit with a front down and it stops. Does feel weirdly annoying until you do the correction What is this 'rear window' thing?? Yeah, my Camaro does this really bad! Particularly on those 'rare' occasions when I'm driving fast. Link to comment Share on other sites More sharing options...
Four-Eyed Buck,SASS #14795 Posted March 29, 2021 Share Posted March 29, 2021 It's a four door thing! It's in the rear passenger doors, not the rear hatch Link to comment Share on other sites More sharing options...
Captain Bill Burt Posted March 29, 2021 Share Posted March 29, 2021 4 minutes ago, Four-Eyed Buck,SASS #14795 said: It's a four door thing! It's in the rear passenger doors, not the rear hatch Some say I don't have back seats at all, but I look back there and I can see them. You can sit in my back seat, or have legs, but not both. Link to comment Share on other sites More sharing options...
Four-Eyed Buck,SASS #14795 Posted March 29, 2021 Share Posted March 29, 2021 Our '05 'stang had the same condition. If I went back there to clean the windows(?), my legs would cramp up really quick. Link to comment Share on other sites More sharing options...
Eyesa Horg Posted March 29, 2021 Share Posted March 29, 2021 Our Honda CRV does it too. Most annoying in the winter when you want to crack the window for the dog. Opening another does help a lot, but much more cold breeze for us! I bet we pay extra for it too. Link to comment Share on other sites More sharing options...
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