In our technological world, I doubt most of us really realize how much electronic "white noise" surrounds us, 24/7. What we think of as "silence" is actually a thick fog of background humming from fans, heaters, refrigerators, computers, and all the modern conveniences we take for granted.
Haha, I was just thinking about that a few days ago. It's like background noise. And it is not only noise pollution, but also light pollution. At night, if you go out to look at the stars, you see many more stars and the sky more clearly when there is no power, in my opinion, or so it seems at least. But the sky looks different.
Also, I think that electronic devices mess with our sleep.
Cheers to you!