Hair trick

[hispls 5,000+ posts]

I didn't see a link by 528Hz. If you are talking about water bears, I did open it and glance at it. If I recall, it was geared towards electrical signal analysis, but it did gloss over some fundamentals.
Added: Taking a look at the link I would guess some sort of wired modem or radio reception as well....maybe DSL?, but those concepts quickly go above my pay grade.

The quote within the quote hid I guess. Yes, the link to the rather complex power formula you posted. Again, not an actual sine wave but another wave signal carried along on one. Seems more telcom/broadcasting application than anything.