home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!utcsri!newsflash.concordia.ca!mizar.cc.umanitoba.ca!bison!sys6626!inqmind!dino
- 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
-
- 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
- > -----------------------------------------------------------------------------
- > | _ /| |`I am not |(Enter your next mistake?)% ping elvis | /// |
- > | \'o.0' | the Messiah!'| elvis is alive | /// |
-
- 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
-