Macbook air making noise

hello, i just bought macbook air a month ago everything was perfect till today when i opened it starts to make noise like zzzzzzzzzzzzzz like disc-top bcs, the problem is that i am not in the us rightnow, iam in egypt, anybody knows?

It looks my Macbook Air (MC503+4GiB RAM) also have similar issue. The noise is from inside of the book, very short and trivial "z", it happens several times to before I start notice it. The short tiny little sound is much different from the CPU fan's continues noise. I am not running any huge program, just browsing web or leave it there waiting for an E-mail.
Some guess: the noise happens mostly when the book is running on battery. I know there are six battery packs for 13'' version of Air. Maybe, I guess during the battery's discharging, something is happening inside the battery emitting or absorbing gas or something which brings the periodical noise. (Just hope the batteries are stable:)
It does not like something is loose inside, because while I am trying to shake (carefully) my Macbook, there is no such sound coming out.
Anybody have any update?
Message was edited by: elxyc

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