I enjoyed reading through most of this thread, especially the explanations posited concerning the earth's frequency and dither. Very entertaining.
@bhvf I understand your frustration and lack of any response offering a rational explanation.
@ps Ditto.
I can tell you that I have been working in the area of resonance and resonators for a long time and it took a longer time to discover a rational explanation as to why the Schumann resonance devices work to affect audio systems and signals.
The idea is not rocket science, in fact it's pretty elementary physics and electrical theory.
The frequency must be a low em frequency. It can be as low as 8 Hz or even lower. Google ELF or ULF in the frequency spectrum.
The frequency generated is a square wave. Not a sine wave.
Joseph Fourier, the eminent 18th century physicist made the discovery that square waves are comprised of a series of harmonically related sine waves of various phases (cosines too) from the fundamental out to infinity. The good news is that as you sum the harmonics up the frequency band the amplitude of each subsequent frequency decreases in a logarithmic way.
Every Schumann device that I am aware of, generates a square wave at 7 - 8 Hz or so.
But the question is how does that affect audio signals?
The answer lies in resonance.
Just like a tuning fork, when the frequency of the fork comes into contact with another thing that has the same resonant frequency then that thing is going to vibrate or gain energy from the activating or stimulus energy signal. So, the low frequency square wave with its underlying sine wave harmonic structure interacts with complex audio signals comprised of sines and various wave forms that can possibly be described under the sun, mathematically (i.e. calculus).
This interaction activates resonances throughout the audio spectrum depending on the activating or driving signal (Schumann) and the audio signal. There is more energy from the resonance happening at the lower frequencies than at the higher frequencies due to the higher amplitude of the early harmonics. Less energy at higher frequencies also assures a more musical affect.
The energy change can be easily measured with a sound level dB meter aimed at the speakers and can be seen on a scope or spectrum analyzer.
To sum up, a low frequency square wave unleashes a harmonic series that when introduced into an audio system, interacts with like frequency signals,produces resonances or an increase in energy or amplitude of those audio signals.
Greater S/N occurs along with increased dynamic range to the sound.
Btw, there is a brand that promotes the idea and that is ADD-Powr.
