Faraday cage - suppressing stray EM fields


Many have been to the boston museum of science and
seen the faraday cage at work in conjunction with their
van der graff accelerator. Guy sits in a big cage - creates
huge lightning bolts, protects himself and audience using
Faraday's law which requires field inside enclosing
conductor to go to zero.

My question is: Wouldn't braided ground wrapped around
power cords, speaker cables, interconnect provide ideal
isolation of these components from one another?

If this is already a part of interconnect or speaker cable design, then why should coiling speaker cable in a pile
matter? Would expect leakage to be confined to termination
points of cable.

Is this principle incorporated into highend power cord design?
judit

Showing 2 responses by clueless

You have to love the variety of posts at Audiogon. Back to back posts today, one is asking which side of an ac plug is hot and the next post is hyperphysics.

I am not certain I understand this question as asked or if I am simply to stupid to understand it no matter how asked. But, I do not think that the guy sitting in the Farady cage had to worry about the integrity of an AC music signal and associated issues passing through the contraption.

Faraday's law states that any change in the magnetic environment of a coil of wire will cause voltage to be induced in the coil and that the induced voltage (emf) in a coil is equal to the negative of the rate of change of the magnetic flux times the # of turns in the coil. Generally taking about the interaction of charge and magnetic field. Not sure you want to create all of this going on around wire carrying your music signal. Could be an impedance/inductance issue in there too.. eh?

The cure would be worse than the disease so to speak.

Why do I suddenly have a headache?

Sincerely, I remain (even more than usual)