[rescue] Thoughts on system noise...

[Jeffrey Sharp]

On Sunday, March 24, 2002, Sridhar the POWERful wrote:

> I've built these systems. It uses sound of the same wave and amplitude,
> but opposite phase to cancel the waves out. It's not easy to engineer
> properly.

I suppose you have to place a microphone at sufficient distance between the
listener and the source of offending noise, so that there is sufficient time
to compute and generate the appropriate opposition waveform. I bet it's not
easy at *all* to engineer properly.

-- 
Jeffrey Sharp

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