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From: rmd@hpfcla.UUCP (rmd)
Newsgroups: net.audio
Subject: Re: Orphaned Response
Message-ID: <13100015@hpfcla.UUCP>
Date: Sat, 23-Feb-85 01:48:00 EST
Article-I.D.: hpfcla.13100015
Posted: Sat Feb 23 01:48:00 1985
Date-Received: Sun, 10-Feb-85 06:21:29 EST
References: <147@lcuxc.UUCP>
Organization: Hewlett-Packard - Fort Collins, CO
Lines: 11
Nf-ID: #R:lcuxc:-14700:hpfcla:13100015:000:465
Nf-From: hpfcla!rmd    Feb  5 22:48:00 1985

Even  though  few  humans  can hear  sine  waves at 22Khz, it should  be
possible  to hear  the  intermodulation  of the  high  frequencies  in a
complex  signal.  For  example,  a 42Khz  signal  could mix with a 41Khz
signal in the glass  doors of your  fireplace  and  produce  a 1Khz beat
tone.

I personally doubt that the magnitude of such  intermodulation  products
are actually audible in the presence of louder sounds, but who knows?

Rick Dow
hpfcla!r_dow