Coil whine sound on Geimibook?

Hi guys, I recently perceive a sound like electricity on mi geimibook, the sound is constant and never goes away. Is this normal? or i have to use my warranty

I have a Gemibook X Laptop and the coil whine sound comes out from charger not from laptop itself. I have asked some others users this model laptop and their charger do the same sound, but it doesn’t mean is normal. At least model I got, I think all production has the same problem. Get closer to your laptop charger and pay attention if it the sound comes out from there, if it is so you can ask for a replacement of your charger for a good one o replace it yourself for another one of same features.