Path: utzoo!attcan!uunet!husc6!mailrus!wasatch!cs.utexas.edu!pp!notrees!unniks
From: unniks@notrees.ACA.MCC.COM (C. Unnikrishnan)
Newsgroups: comp.sys.next
Subject: Re: Fwd: LSC problem
Message-ID: <70@notrees.ACA.MCC.COM>
Date: 21 Nov 88 02:05:44 GMT
References: <1608@macondo.sw.mcc.com>
Organization: MCC, Austin, TX
Lines: 24

From article <1608@macondo.sw.mcc.com>, by simon@macondo.sw.mcc.com (Simon John Gibbs):
> 
> This is not a new idea, and it is possible when the noise
> source is sufficiently predicatable. There's a company named Noise
> Cancellation Technology Inc. who've been active in this area for
> a few years (they were mentioned in Omni about a year ago). I
> believe they have a product for factory environments and are
> working in a car muffler.
> 
> Simon Gibbs  (simon@mcc.COM)

 
any info on how it is supposed to work?

this reminds me of one of arthur c. clarke's short novels which i
read many years back. basically some folks are trying to sabotage a
concert by using a sound cancellation device. they tap into the 
main amplifier output and feed it in to produce a waveform which 
completely cancels out the original sound wave before it reaches
the audience's ears.

dont remember the name of the book or the whole story now.

unni