Whistling light bar

FirstJeep

TJ Enthusiast
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Joined
Oct 29, 2018
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The PO of my 2000 Sahara installed a light bar on the top of the windshield. It works well and it looks good also. Problem is at highway speed there is a whistling sound that is so loud I have to turn the stereo up to drown it out. Does anyone else have this problem and has anyone found a fix for this?
 
Just tilt the light bar down or up and the whistle will go away. I had to tilt mine down. Don’t buy no extra stuff waste of money.
 
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Whistles are usually a result of air flowing over thin overhangs or through gaps. See if sealing any gaps reduce the noise. I know glider pilots like to seal up any panel gaps with tape which reduces wind noise a lot.
 
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Yep. Fuck that light bar.
This is turning into a thing here, huh?🤣
But yeah, I would run a lightbar but there are just too many complaints about whistling or making your soft top resonate, neither of which I want.
 
Go to the How To Section, there are cheap fixes. I used a piece of rubber baseboard molding as an air dam. 5 minutes of effort and $4 to fix it.
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This is turning into a thing here, huh?[emoji1787]
But yeah, I would run a lightbar but there are just too many complaints about whistling or making your soft top resonate, neither of which I want.

Love em or hate em lightbars put out a lot of light and personally I use mine ALOT.


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Automotive door edge molding, cut and put on the heat sinks.
Thank you. The "whistle" with rare exception is caused by the fins vibrating at a high rate of speed that makes a noise that sounds like a whistle but isn't exactly. If one will take the door edge trim, cut some pieces about 3" long and place them 1/3 of the way in from each end on the fins, the change in weight changes the vibration frequency and the noise goes away.
 
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Fixed that for ya...
The thought process behind that solution is what produces a lot of the crap we see out there and clearly illustrates that knowledge does not equal understanding. They know lightbars can make noise so their answer is to wrap the whole thing with an expensive sleeve to prevent air movement from reaching the fins. They lacked the understanding that the noise is caused by the same thing we see when a flag flaps in the breeze, just at a much higher rate. They thought they were solving the noise caused by the same principle as blowing across the top of a beer bottle. Less beer, more flag. Knowledge does not equal understanding.