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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.

Hmmm...  Interesting.

I'm hoping to eventually use this op-amp idea with ears to give the
wearable basic commands while driving (ie to fetch my email and read it
to me), so no, I wasn't thinking of trying to make it pick up anything
but the wearer's voice...

Though perhaps one could duct-tape a shotgun mike to the shank of one's
glasses to pick up whomever one was looking at. :)

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.

Lacking sleep (so sorry for any ramblings of misspellings),
  -Lee

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