Surface Pro 4, annoying noise from the back!

Here is a video of the noise on an i5 unit, so an i7 user can hear what we are talking about:

https://www.youtube.com/watch?v=P90axF499\_M&feature=youtu.be

I am also seriously considering returning the device.  As another user mentioned, it simply hurts my ears when studying in a quiet room.  Not acceptable on a premium device and not unavoidable - my iPad Air 2 is completely and utterly silent.  I could go to the MS store and try to find a quiet unit, but the chances of that are small from what I've read here.

If anyone from MS could shed any light on this issue we would all be very grateful.

I can hear that noise loud and clear in that video.  However, the sound I hear is a different sound that is more like ear-ringing / tinnitus, and it can be altered by changing the screen brightness settings. 

From what it sounds like (no pun intended), we have two different sounds being emitted from the camera sensor area (and elsewhere, too):

1. High-pitched noise that sounds like ear-ringing; can be changed by altering the brightness; loudest at brightness setting above 0% or below 100%
2. High-pitched scratching noise / coil whine; can be changed by touching the screen, or changing what content is displayed on the screen.

NOTE: The sound of the fan is NOT the same as either of these.

PS: Good job on recording that video!

That's very interesting.  The noise in my video is correlated with what the computer is doing.  Touching the screen dampens the noise and adds a buzz to it (I'm not sure the buzz is audible in the video).  I cannot notice any obvious correlation with the brightness level.  However, it is also most audible at the top right of the computer - that is where the processor is btw.  It would be interesting to see a demonstration of the noise correlated with screen brightness, if someone wanted to make a video of that...

EDIT: I have heard the brightness-correlated noise.  It is indeed different from the CPU-correlated coil whine, which on my machine is much louder.

Has battery been affected by this?

I'm having the same issue with my m3. I also don't hear it at 0% or 100%. Is there any hope that this could be fixed via a software update or is it definitely hardware related?