Re: A4 - Annoying Wind Sound?

[rlpplsky <rlpplsky@ix.netcom.com>]

>Date: Sat, 27 Dec 1997 08:41:25
>To: Justin Fidler <justin@codeboy.net>
>From: rlpplsky <rlpplsky@ix.netcom.com>
>Subject: Re: A4 - Annoying Wind Sound?
>
>Chances are you found the resonant frequency of your passenger compartment.
With the windows down at the right distance your car is a giant base fiddle.
The air rushing across is exciting a fundamental frequency.  My wife's ovloV
does this with the sunroof open and it stops if you crack any window.  Try
cracking a front window and see if it stops.
>
>Ralph Poplawsky
>
>At 01:50 AM 12/27/97 -0500, you wrote:
>>
>>One thing I've noticed about my A4, which occurred again tonight when a
>>passenger put down the rear window.  When one (or both) of the rear
>>windows are down about halfway, and the car is cruising at least 25mph, it
>>has this really loud reverberating wind sound -- like helicopters are
>>nearby. It was so loud that my passenger promptly put her window right
>>back up. Has anyone else had this?  I've got the 1.8t engine and the sport
>>package. It's got to be something with the aerodynamics.  The front
>>windows were up at the time.  I didn't get a chance to do more testing.
>>
>>Justin
>>97 A4 1.8tq
>>
>>
>>
>