Weird ringing noise when laptop is plugged into AC - HP ENVY 14-2050se Beats Edition Notebook PC

Hi, last month I bought this HP ENVY 14-2050se Beats Edition Notebook from a nearby electronics store and I loved it from first sight. Except a few problems emerged when I first turned it on at home. First, yes I did a full hp recovery factory restore when I got home. It is running Windows 7 Home Premium and I already tried muting the microphone and speakers and it has not solved the problem whatsoever but it only shows up when I have my Envy plugged into AC power, on battery it makes no noises.
The problem is that whenever it is plugged in it makes a weird ringing noise which is very clear and hearable to me and my friends and gives me headaches constantly. The noise is almost identicle to that ringing noise you get in your ears after hearing very loud noises. I tried using my mom's HP ac adapter on my Envy and it still produces the noise so its not the adapter itself im assuming. Also, sometimes when playing music or watching videos on youtube it will hang for a split second or so once every while and make a weird buzzing noise, im assuming that could be normal behavior though and im not as worried about that so much as my other problem.
Any help is greatly appreciated, I just want to enjoy this great laptop!
Sincerely, Lance Shults

Hi, you aren't the only one.
I have a HP Envy, and I have this rining noise as well.
it is odd.
If I had to take a guess (I've been in IT for almost 17 years), I think it might be the power supply for some reason, in the laptop. Not the external supply.
Nearest I can say is it is a fast paced ring/ding.
Is yours similar?

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