Solved Why My Ipad Got Electricity Sounds From The Back Of The Ipad Ipad Pro 11

Chosen Solution

I’ve had my iPad pro 2018 for 8 months now , recently for a week now i hear a voice from the back of my ipad like electricity sound when I close the The screen the sound decreases and when I turn on the screen the sound get higher but the sound is there rather I close or open the screen why so ?

Coil whine? Happens on my iPad and iPhone too, seems like it’s normal