Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!samsung!brutus.cs.uiuc.edu!apple!mips!prls!philabs!ttidca!hollombe
From: hollombe@ttidca.TTI.COM (The Polymath)
Newsgroups: sci.electronics
Subject: Re: Ultrasonic Pest Repellers
Keywords: pest,fraud
Message-ID: <8039@ttidca.TTI.COM>
Date: 28 Nov 89 19:42:50 GMT
References: <31929@buckaroo.mips.COM> <5123@tekcrl.LABS.TEK.COM>
Reply-To: hollombe@ttidcb.tti.com (The Polymath)
Organization: The Cat Factory
Lines: 28

In article <5123@tekcrl.LABS.TEK.COM> vernak@tekcrl.LABS.TEK.COM (Verna Knapp) writes:
}About 5 years ago the owners of 7 catteries (cat breeding establishments)
}banded together to buy a number of these devices at a discount. ...

}The humans in the houses with these devices began to develop marital
}problems, etc. as a result of subtle increases in the irritability of
}the people. ...
}... the irritability problem
}could be turned on or off by turning the devices on or off. ...

About 10 years ago my then SO tried to use one of these things to rid her
apartment of fleas.  Unfortunately, she used one that was designed for
rodents.  The fleas didn't mind it at all.  I, on the other hand, couldn't
stand to be in the apartment when it was running.  My ears were 10 years
younger then and it _hurt_ -- something like 140 decibels of high-pitched
scream every five seconds. (Well, I _was_ born in the year of the rat. (-: )
Not only irritating, but potentially permanently damaging to your
hearing.

The irritating effect of ultrasonics has been known for a long time, BTW.
I recall reading articles about it in "Popular Electronics" over 30 years
ago.

-- 
The Polymath (aka: Jerry Hollombe, hollombe@ttidca.tti.com)  Illegitimis non
Citicorp(+)TTI                                                 Carborundum
3100 Ocean Park Blvd.   (213) 452-9191, x2483
Santa Monica, CA  90405 {csun|philabs|psivax}!ttidca!hollombe


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