The Controversial Sound Only 2% of People Hear [video]
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It doesn't cause anxiety, nausea, etc., for me, just minor annoyance. Covering my ears doesn't reduce it. I wouldn't consider moving because of it, but if I knew about it before buying a home here I might not have. Just like the video describes I only hear it in my house late at night. I've wondered if there is some kind of recording equipment that could record it.
It's still possibly all in my head.