Do your MacBook make a high pitch beeping sound?

Just got a late 2011 MacBook pro with SSD hard drive (17 inch i7).
I have noticed an almost inaudiable high pitch 'morse code' like beeping coming from the machine. Maybe the SSD being accessed?
I do have tinnitus and have been known to become irritated from low Hz monitors and TVs in the days when they operated at 50-60 Hz. So maybe something in the machine is operating at that fequency.
It may be nearly audible, but it's driving me mad when the music is off and I'm trying to concentrate!
Does anyone else experience this?

Does the beep sound similar to this video? Skip to the 00:44 mark to hear the sound. If the sound is this one that means that your Mac is trying to update its EFI.
Would you mind recording a soundbyte? That could be really helpful. It's not possible that the sound is coming from the SSD, perhaps is your fans.
Hope that helps.
P.S. If you are too bothered you can also make an appointment at your local Apple Store Genius Bar.

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Hello Huanwei,
It appears that you can hear a "high pitched beep" coming from the notebook while it's in sleep mode or even off, when the power adapter is plugged in and "on". I will try to help you with this.
Normally, this should not happen. Beeping from a computer may happen during start up a few times to indicate components enabling, but any constant beeping or being while the computer is off shouldn't happen.
Does this occur, if the AC adapter is not connected to the notebook when it is in sleep mode or off? Do you only notices this, in a specific location? (office, etc.)
I would suggest, depending on the setup of things. Taking the notebook with no AC to another location in the house. A quiet one, make sure your not near any other electronics (no watches or cell phones either) let the notebook sleep and see if you hear the beeping. If not, then power it off and test again. If no beeping, this is good and the notebook is fine.
Repeat that same test with the power adapter connected ( again no other electronics around you). Listen while it is "sleeping" and off to see if you can hear the beeping again.
If you do disconnect the AC from the notebook , but leave that connected to the wall and take the notebook out of that location, go back to see if you can hear beeps again. If you do it could be the AC adapter. If you don't then it could be an issue with that only when it's connected.
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Do your MacBook make a high pitch beeping sound?

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