Dude the noise is the fan motor 
This is no high end low noise fan but it is silent enough for its purpouse. You should look out for the Q5pro...which is said to have no fan if you (obviously) are sensitives to that matter.
-Have you listen to the video I have linked? (You need to set the volume up a bit.) Just compare to your own Q10 Pro, ears close to the fan. If your unit isn't bugged as mine, you should hear the difference. That electric-like sizzling isn't what I would call as the fan motor.
I have a plenty of fans at home inside my computer, other electrical units and also this kind of small sized fans in my 5 year old laptop, but none of them makes noises like this. It would be a huge wantonnes and understatement to point this like you suggest. Even if it's the motor of the fan, it has some truble, and faulty.
The videos quality isn't that great, but I have no other option yet, and In reality one can hear the noise from like 30cm away (which doesen't sounds on the video, due the quality of the mic of my camera, just when I get really close up)...
Still waiting for an official Futeko members response... Thanks!