Re: noise cancellation

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Article #814

#814

From: Ralph Finch
Date: Sat, 09 Jun 1990 17:37

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I suppose this question belongs in sci.energy, but since "noise
cancellation" started here:

In an audio noise canceller (sp?), one injects energy into the air.
Like a truly soundless room, no sound is heard, but now there is
energy.  What does this energy get converted into, heating the
air maybe?  In a soundful room, would the energy heat other objects
(walls)? 
-- 
Ralph Finch			916-445-0088
rfinch@water.ca.gov		...ucbvax!ucdavis!caldwr!rfinch
Any opinions expressed are my own; they do not represent the DWR

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!samsung!usc!apple!mips!prls!pyramid!unify!csusac!ucdavis!caldwr!rfinch
From: rfinch@caldwr.water.ca.gov (Ralph Finch)
Newsgroups: comp.dsp
Subject: Re: noise cancellation
Message-ID: <170@locke.water.ca.gov>
Date: 9 Jun 90 17:37:04 GMT
References: <595@mercury.iotek.UUCP> <791@anaxagoras.ils.nwu.edu>
Organization: Calif. Dept. of Water Resources, Sac.
Lines: 13

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