@mapman The Fourier series theory stands behind all of electromagnetism.
The em wave emitted eventually by way of speaker transducer, becomes a sound wave. The cart before the horse scenario. The reason the Schumann frequency affects you, and all human physiology is because the frequency induces a calming, relaxed, yet alert and focused influence.
It is a theta frequency (7-12 Hz).
The idea has nothing to do with sound.
IT has everything to do with the manipulation of e signals that become sound waves.
That’s what amps and speakers do.
There is no rational explanation out there that connects the dots.
Again: square wave, Fourier harmonic series, and resonance. All supported by laws of physics, which includes the science of sound. Get it?
It is right on the spot and clear like water...
I forget about that but ,yes, the frequency of the theta brain wave resonate with the S.G.
It makes absolute sense....
I proposed a simple experiment:
Put a piece of shungite on the S.G. and an herkimer diamond and the sound will be improved and more balanced.... then the S.G. act also with the audio signals .....
Thanks... It is my experience.... I think the resonance concept make sense and more on the spot than the "dither" one i was thinking about....
Thanks and my deepest regards ....