Re: How to build noise reducer?

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Article #14783

#14783

From: Tony stewart
Date: Thu, 19 Nov 1992 08:24

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zhenya@socs.uts.edu.au ( The Firefox.) writes:

> Does anyone have any ideas about the best way to build a device that takes
> an input from an external microphone, shifts the signal 180 degrees out
> of phase, and then re-emits it with little loss of resolution of the
> waveform in the process?
> 
> It would be great if it could also work from frequencies of about 20Hz up...
> 
> Maybe there is a mail-order kit for something similar that someone know of?
> 
> Thanks in advance...
> Zhenya.
> 
> --
> Ring Bad News BBS - +61 2 587-8441
> -----------------------------------------------------------------------------
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HOW ABOUT AN AUDIO TRANSFORMER matched to the impedance of the mike.
Then just invert the output (ie reverse output leads). This would work 
for high output mikes. But better to do this a line output levels, since 
low impedance mikes are not high level output.

dino@inqmind.bison.mb.ca
The Inquiring Mind BBS, Winnipeg, Manitoba  204 488-1607

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From: dino@inqmind.bison.mb.ca (Tony stewart)
Newsgroups: sci.electronics
Subject: Re: How to build noise reducer?
Message-ID: <F89guB4w165w@inqmind.bison.mb.ca>
Date: Thu, 19 Nov 92 02:24:26 CST
References: <zhenya.722056566@syzygy>
Organization: The Inquiring Mind BBS  1 204 488-1607
Lines: 27

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