SAMSUNG GALAXY S7 SM-G930F UNKNOWN ANNOYING NOISE

Hello,
Does anybody know what this noise means and how to get rid of it ???
As you see from the this video the noise comes once i light up my phone screen. And in most cases never stop.
I really dont know it is moisture sensor or phone positioning sensor tripping, or some parasite app doing all this.
Please help.



Thnx

P.S. Sorry for this short video. In the future i gonna add even longer one.

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