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Re: Skin effect , time smear some references and formulae

While this site seems to offer a fairly complete analysis of skin effect in wires at audio frequencies, it does overlook at least two things which may be significant in terms of audio cables.

In addition, the losses due to skin effect are erroneously calculated and displayed in terms of power, which is not relevant for interconnects, and not a good way to look at it for speaker cables due to the ratio between the source and load impedances. Use of power to calculate and display losses would reduce the apparent amount of signal loss.

I have to question the intentions of such a site, when it seems that an overly analysis is being used that is superficially rigourous, yet incomplete, and ignores the fact that other things are going on.

If the web site presentation did not intend to create such an erroneous impression, then at the least it is misleading and incorrect in it's final conclusions due to these oversights and errors.

It is promising that the section on wires:
http://www.st-and.ac.uk/~www_pa/Scots_Guide/audio/part6/page1.html
does point out that the signal exists in the EM fields OUTSIDE the wire, this is a fairly decent portrayal of this important fact, one often overlooked by those derisive of insulation quality.

Jon Risch

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