Light sizzle in the top left of the keyboard in MBA 13" 2010

Hello,
My new MBA 13" (4Go, 1,86Ghz, 128Go) make a very light sizzle in the top left of the keyboard. I think this is the fan's noise because the sizzle stops when I turn off the computer and it starts again when I turn it on.
Do you hear the same noise in your MBA ? When I work in silence, it is quite disturbing...
Thank you for your help,
Joan
Message was edited by: JoZoz

No, it won't be different to return it. You could go to genius bar at a store and let them listen. But likely they won't be able to hear it. I don't know if anyone ever positively identified the source of the sound. I remember one speculation was that it was related to frequency stepping done by the CPU to reduce power. This post takes about one person's experiences with the sound. The early Intel MBP also would make a very faint "moo" sound just before a fan would kick on. That was even more strange.
http://www.red-sweater.com/blog/107/macbook-pro-noise-update

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Light sizzle in the top left of the keyboard in MBA 13" 2010

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