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From: whs70@pyuxe.UUCP (W. H. Sohl)
Newsgroups: misc.misc,sci.electronics,misc.legal
Subject: Re: Phone Harassment
Summary: It's technically impossible.
Message-ID: <987@pyuxe.UUCP>
Date: 17 Mar 90 03:49:40 GMT
References: <21849@watdragon.waterloo.edu> <13746@watcgl.waterloo.edu> <1185@gtx.com>
Followup-To: misc.legal
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Organization: Bellcore, Livingston, NJ
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> In article <90071.220057SAB121@psuvm.psu.edu> SAB121@psuvm.psu.edu writes:
> >
> >There's an even more interesting version of that going around near where I
> >lived. Get an air horn like the type used for small boats. Keep it handy by
> >the phone. Next time the bastard calls, give him a shot of that. It's almost
> >guarenteed that in 24 hrs or less he'll be stopping by an emergency room to
> >get work done on his ruptured eardrum.
> 
>
The telecommunications circuits do NOT allow the passing of a signal
that would be loud enough to rupture an eardrum.  Today's telephone
circuits pass a nominal range of frequencies of 300 to 3000 hertz
within a finite range of amplitude (loudness).  Telephone circuitry
is designed to carry voice and is not designed, therefore, with
the type of dynamic range of frequency and amplitude of even the
cheapest forms of stero equipment.

Bill Sohl
Bellcore (Bell Communications Research, Inc.)
bellcore!pyuxe!whs70