It's difficult to get out in the middle of nowhere, but I managed it
We bought land in Interior Alaska, and (currently) our nearest full-time neighbor is 2 miles away. Even if other land owners near me decide to move in, I still have a pretty decent chunk of my own land between mine and theirs and fully intend to keep as deep green belt of trees around the perimeter to block sight and sound (as well as really thick walls on the house). Right now, the only noises I have to deal with on a regular basis are wind, a problem unto itself, and some of our equipment (chainsaws, ATV, etc). Every now and then, you might hear a particularly loud truck go by on the road a little over a mile away, or a small bush plane fly overhead. During hunting season, you can sometimes hear gunfire, but that's usually not very close.
It's HEAVEN -- and I highly recommend to anyone with sensory hypersensitivity and a desire to live in the boonies to do everything in their power to find a situation like mine. It isn't easy, but with persistence it is possible. If I had known what a difference quiet solitude would make to my health I would have done everything in my power to do it decades ago.
It is better to be hated for what you are than to be loved for what you are not. --- Andre Gide
Selfishness is not living as one wishes to live, it is asking others to live as one wishes to live. --- Oscar Wilde