Maxwell's Equations tell you all you need to know about how E-M fields propagate in various media.
Yeah, E-M fields slow down in media other thanlight vacuum/air. And it's related to the dielectric constant (n) - or more precisely, the complex permittivity.
There are different kinds of dielectrics with different behaviors - ferroelectrics, anti-ferroelectrics, etc., etc. The dielectric properties can and do change as a function of applied electric field for many, many types of materials.
But almost none of this stuff matters at audio frequencies! That's how you know all this is woo. At microwave and mm-wave and visible frequencies (GHz to THz+) - yeah this stuff matters a lot.
At 20-20,000 Hz, nah, not so much.
And digital - yeah, digital doesn't care about 20-20,000 Hz audio signals either.
Cheers,
Scott.
Yeah, E-M fields slow down in media other than
There are different kinds of dielectrics with different behaviors - ferroelectrics, anti-ferroelectrics, etc., etc. The dielectric properties can and do change as a function of applied electric field for many, many types of materials.
But almost none of this stuff matters at audio frequencies! That's how you know all this is woo. At microwave and mm-wave and visible frequencies (GHz to THz+) - yeah this stuff matters a lot.
At 20-20,000 Hz, nah, not so much.
And digital - yeah, digital doesn't care about 20-20,000 Hz audio signals either.
Cheers,
Scott.