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Interconnects, speaker wire, power cords. Ask the Cable Guys.

Cheeze wiz (didn't know what to put here)

Everything I have learned as an EE agrees with you. Hearing is a VERY variable perception; the materials shouldn't do that.

I do not necessarily see how the metals can change, but I certainly do the plastics. I use them everyday in cryogenic applications, and have seen some flakey stuff.

Actually, as I wrote it, I have seen weird metal stuff. Semiconductor aluminum moving at the atomic level enough to break chip level interconnects; tin whiskers form in military hybrids. (Pure tin, even at room temperature, can grow spikey, long tendrils, which caused failure of the hybrid by shorting or intermittants. That phenom was also not supported by existing metallurgy!! But the failures were high level, Satellite or shuttle app, I think.

But I've heard some rather intelligent people, all walks of life, all technical levels, swear it happens. Mass hypnosis? Something we're not looking for? Who knows. But we're trying to formulate a strategy to find out. My approach will be the measure end.

Keep involved,

TTFN, John




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