macbook air speaker crackle at high volumes

Does anybody else have an issue with the MacBook air's is internal speakers. When I listen to certain songs or talk, at high volume it sometimes makes a crackling noise. I have determined that it is not the speakers, but in fact the keys. The MacBook Air actually has quite good and loud speakers, considering how fin it is. So when you play something really loud, you can feel it through the whole computer. This makes the keys by bribrate, and makes the crackling nosie. If I put my hands on the keyboard when listening to something that would normally make the noise, I cannot here it. So I think it's like the screen gradient problem, I think the air's probably have this. Some have said that they took their to apple and then replace the speakers, but obviously this make no difference. I have tried one out in the store and it does it as well. I suppose it's just a sacrifice we have two make for fin design. The way I solved it was by getting a keyboard cover, this stop the keys from vibrating. I made a video about this, where I link to some songs where you can hear it. If you can hear please comment here or on the video. thank you here is the link - http://www.youtube.com/watch?v=EaVHF3iv4Gw