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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

RE: The basic premise

IIRC, and admittedly my memory is rapidly fading, The Schumann frequency is supposedly the fundamental earth frequency, and determined basically by its diameter and the diameter of the ionosphere. The difference is supposed to compromise a rough waveguide for EM frequencies which will circle the globe. Of course, the average diameter of the halfway point of the earth surface and the ionosphere determines the Schumann frequency.

Also of interest is that much of the EM is caused by electrical storms ( read lightning). Some questions come immediately to mind. Schumann frequencies are usually defined at 7.83 Hz. The recent spate of thunderstorms (they accompany tornado activity) and other weather phenomena obviously will affect the frequencies, and my guess is more storms, the higher the frequency. Sunspot cycles will also affect the height of the ionosphere which will also change the frequencies.

Some recent NASA photos show stunning photos of lightning displays, with flashes extending far into low earth orbit, and extending over many square miles, though not visible from the ground.

How all this affects audio is still to be determined, but perhaps through the power lines, since an AC grid represents a rather huge antenna. That being said, the ionosphere height is in constant fluctuation, and my guess is that things like storm clouds will affect the height too. All would have some effect on the Schumann frequency, even if localized.

The Navy makes extensive use of waveguides for their electronics transmissions. I've worked on a few and they demand very precise layout to maintain a constant inside dimension, Of course the navy is interested in specific frequencies. The Earth based generated frequencies are unbelievable variable to US Military standards, or so it would seem, so there is great leeway in SG.

The SG do work, even the fixed frequency ones, or at least they do in my system.

Some other points to ponder. The earth's magnetic poles are not concentric with the geographical poles (isn't magnetic north close to Greenland now?). Does this mean the rotation can develop magnetic induction on the surface of the planet?

Recent studies indicate that the Schumann frequency is making slow rise

YMMV



Edits: 04/12/15

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