> > Does a product currently exist on the market that:
> >
> > Takes two or more microphone inputs and applies noise canceling to
> > them, then provides a noise-suppressed output? (Ex: by phase
shifting
> > and adding the waves)
>=20
> It seems you are describing any of several noise-reduing headsets that
are
> available from electronics retailers, office supply stores, and
Wal-Mart, as
> well as others.

That was my immediate thought as well.

=20
> > If not, how difficult would it be to make one? Perhaps with a dsPIC
or
> > PIC32.

A dsPic would be potentially capable of doing this. Microchip does have
an echo-cancelling library for it.
--=20
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--=20
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