On Sun, Mar 31, 2013 at 09:59:11PM -0700, Len Ovens wrote:
> You are getting sound from your mic... therefore it must be a dynamic mic.
I wouldn't be so sure. Electret mics can in theory produce a tiny signal
even without power, but I don't think that's the case. More probably the
mic pics ups some signal from the amplifier/speaker by magnetic induction.
Regarding using the city water (or central heating pipes, or whatever) as
a security ground: DON'T DO THAT. It would be illegal in almost all places,
and you could easily kill or injure yourself or others if anything goes wrong.
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
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