Physics. Not the high point of a public school education, I'm guessing.
In order to even begin to answer the question it helps to first understand the question. Which really is, "How could broadcasting 7.83 Hz radio waves improve the sound of your system?"
Well, I don't know for sure how it works, but its pretty easy to think of how it COULD work. In a word: dither.
Dither is a sort of randomized input that when added to a signal subjectively improves the output. Dither is used all the time in video. Do a search, see what I mean. It sounds weird, but adding the right sort of noise actually improves things.
Ted Denney III is tight with his secrets but he did mention somewhere once that his HFT, ECT and PHT devices work on dither. They are tiny, but when it comes to dither it doesn't take much to produce a very noticeable effect. They work, as far as I can tell, acoustically.
But there's no reason to think the same principle (dither) wouldn't apply electronically. RFI is noise and our systems sound better with less of it. Flip off some breakers in your panel and hear for yourself. This simple experiment proves two things- radio waves do get into our wires, and they do affect the sound we hear.
So while I can't prove it, it seems pretty obvious to me that if you put a 7.83 (or whatever) Hz radio wave generator in a room, that the signal is going to get into your system. One way or another. Every single wire is after all an antenna. The only question is whether this can actually make your system sound better? The answer would seem to be yes.