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Cliff330i said:
Guys, yesterday I was driving and I lowered the right back window all the way. As soon as I lowered, this weird acoustic booming sound could be heard. When I say, weird, I mean WEIRD! I was like a bass drum beating very fast perfectly in time. But, it was so loud and deep that it hurt my ears. I mean, it was overwhelming that I just couldn't stand it. It's hard to explain but it was very overwhelming and forceful. I lowerd the other back window and it go even worse! If I have all windows down, it doesn't do it nor if I have any combination of front windows adjusted. It was like something out of a moive sound effect. Maybe some one has experienced this? I don't know what the hell it is. If you have ever been outside and had the wind slap you right in the ear; that's exactly what it like but in a rhythmic fashion. Cheers, -C
Its a resonance... most cars I've had have this. Some combination of interior volume and roadspeed will create this. Just like a wind instrument, why it makes the noise.

Nothing to worry about.
 
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