Propeller Head Plaza

Technical and scientific discussion of amps, cables and other topics.

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RE: Cable shootout... Are all audio cables the same?

Posted by tomservo on June 23, 2014 at 16:09:03:
The only thing that propagates at the speed of light is electromagnetic radiation in a vacuum, light (also electromagnetic radiation) traveling through glass, water or other materials travels slower and as a result we can have lenses which bend light.

Electromagnetic radiation propagates in two components, a Voltage field and 90 degrees apart, a Magnetic field and that is much like sound which propagates with two components, the familiar “sound pressure” and 90 degrees apart the less well known particle velocity.

With light however the wavelength as one departs the microwave range into far far infra red, the wavelength becomes too short to discern the two parts separately. None the less, light and radio are a continuum.

It remains that the “signal” we call analogue audio, is an alternating voltage referenced signal which propagates at the cables velocity factor. This may help, from an area where this is critical and well studied;

http://www.radio-electronics.com/info/antennas/coax/coax_velocity_factor.php