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Noise-cancelling mike (was Re: <00> Sound Cancelation)

>  wrote:
> > It sounds like what you're describing would only work for the wearer. In
> > other words, a noise-cancelling mike. These are commercially available,
> > although they work a little differently from what you describe. They are
> > basically open on both sides of the element, so the user (usually a pilot)
> > talks (applies sound pressure) to only one side of the element, while any
> > other sound (engine/cockpit noise, for example) hits both sides of the
> > element equally, and doesn't register. Or at least that was the theory as
> > described to me in flight school.
> > The only problem with these mikes is that they are not very senstive, and
> > you literally have to hold one up to your mouth close enough that your lips
> > brush it.
> 
> Though perhaps one could duct-tape a shotgun mike to the shank of one's
> glasses to pick up whomever one was looking at. :)

Well, if you're going to start with your mil-spec RPGs to begin with, I
guess that won't make 'em look any worse. 8-)
(NB: RPGs= Rape Prevention Glasses. These things are Ugly!)

> I'd think that any sort of omni-directional noise reduction thingie
> wouldn't work well enough for speech recognition to work accurately
> unless one was in a fairly quiet place to begin with...  Definitely not
> walking down the sidewalk.

you've got that right. These noise-cancelling mikes do work very well in
extremely noisy places, though. If you've ever been in a Cessna 152, you
know what I mean.

Paul Archer

----------------------------------------------------
A key to the understanding of all religion is that
a god's idea of amusement is Snakes And Ladders with
greased rungs.   -- Terry Pratchett, "Wyrd Sisters"
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