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Re: Microphones

I don't know if this is what you are looking for, but here are some 
construction plans for  noise-cancling headphones using a pair of
microphones and some op-amps.  You can probably use a similar arangement
to make a noise-cancelling microphones.

http://headwize.com/projects/noise_prj.htm

A non-electronic solution would be to use a microphone which has its
diaphram
open to both sides.  In theory ambient noise cancles out (equal pressure
on the front and back of the diapram), but directional sound (e.g.
voice)
does not.

 wrote:
> 
> Does anyone have any leads on noise-cancellation microphones that I might use
> on my wearable with voice recognition?
> 
> Cheers,
> Daryl
> 
> 
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-- 
#---------------------------------------------------------------
# Geoff Parker                             
# Software Engineer                        805 988-8250
# Viewlogic Systems                        1369 Del Norte Rd.  
# Signal Integrity Group                   Camarillo, CA 93010

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