Yeah, I get that also. Have not been able to figure out exactly what is triggering it. Sounds like static coming from speakers. I cannot remember if it was happening under windows 10 version 1511, but it definitely does under 1607. It doesn’t seem to matter if the tablet is muted or not. Disabling the sound in device manager stops it, but that is not a viable work around.
I am having better luck with the surface 3 sound drivers which someone posted in the teclast X98 plus ii thread.
Not sure if it happens in android as I have not used it much.