Windows 10: Buzzing noise

Everytime I scroll in firefox it makes a small faint buzzing noise and I've tried to search it up but nothing has worked so far, it's never done this until now even when I had a different mouse it still makes the noise. When I put my ear near my pc there's not a single sound it's only through my headphones which are USB.

:)

 

N95 buzzing noise

I also have that slight buzzing noise which is bearable and it doesnt affect my calls or anything like that

Though once in a while usually after the phone has been plugged into the computer and alot of file transfers and apps installed i get a much louder buzzing noise that kills the battery in like 2 hours the only way to kill the noise is to switch the phone off
and than on again anyone else have this problem

 

N95 buzzing noise

Well i try setting the Backlight at FULL power ora waiting back light but the Buzzing noise is allready there!

 

Handsfree buzzing noise in 5500?

I have the 5500 sport, and with the included handsfree I get the same kind of buzzing background noise that you hear from any speaker (TV, radio etc.) if someone is using his mobile phone close to it. I can reduce the buzzing noise by holding the phone
or the handsfree chord in my hand.