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From: jcp@osiris.UUCP (Jody Patilla)
Newsgroups: net.med,net.info-terms
Subject: Re: VDT's and eyes -- and ears.
Message-ID: <626@osiris.UUCP>
Date: Wed, 8-Jan-86 08:51:27 EST
Article-I.D.: osiris.626
Posted: Wed Jan  8 08:51:27 1986
Date-Received: Fri, 10-Jan-86 06:35:39 EST
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Organization: Johns Hopkins Hospital
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Xref: linus net.med:2956 net.info-terms:335

> >By the way, the fellow who got headaches in the room full of burning-in
> >monitor assemblies was probably being affected by the near-ultrasonic
> >sound generated by the horizontal circuits (often transformer laminations
> >vibrating).  Even if he didn't consciously hear them, such whistles would
> >lead to irritability and headaches.
> I can hear them!  (usually.)  And also the cheap security TV cameras
> and TV's and sonar burglar alarms and traffic light detectors.  How
> common is this phenomenon?  When I've mentioned it, most people are
> surprised or doubtful; a few are surprised that everyone doesn't.

	I can hear them too, and so can my brother but neither of our parents
can, nor can most of our friends. It's odd for me, since my hearing is actually
deficient in mid-range conversational tones. It is truly annoying and does
not have any advantages that I've been able to discover, and just increases
other people's opinion that our family is weird.

-- 
jcpatilla

"If we can send a man to the moon, why can't we send all of them ?"