Path: utzoo!mnetor!uunet!husc6!mailrus!ames!pasteur!ucbvax!agate!saturn!ucscb.UCSC.EDU!matthew
From: matthew@ucscb.UCSC.EDU (73550000)
Newsgroups: sci.electronics
Subject: Re: frequency of a rat
Message-ID: <2761@saturn.ucsc.edu>
Date: 11 Apr 88 03:18:13 GMT
References: <1313@uop.edu>
Sender: usenet@saturn.ucsc.edu
Reply-To: matthew@ucscb.UCSC.EDU ((Matthew T. Kaufman))
Organization: University of California, Santa Cruz; CATS
Lines: 38
Keywords: annoy zap deter

In article <1313@uop.edu> todd@uop.edu (Dr. Nethack) writes:
>A friend of mine lives on a levee, lots of rodentia about..
>
>Dogs barking all night means little sleep..
>
>My sugestion was to find the frequency used in those mouse zappers,
>build an oscillator, and crank it out of some horn tweeters over
>the bank (and use a transducer to crank under the water if necessary).
>
>Where does one find tables of such frequencies and their effects?
>
>(CRC handbook of obnoxious electronic tricks)  :-)
>
>Thanks!
>

1. According to several sources (including the FTC) those things
 don't work against ANYTHING.

2. Even the ones that say that they don't bother cats and dogs
 occasionally do... that won't help the dog barking problem
 one bit.

3. (and the most annoying one)  MANY of those (especially the
 cheap ones) have spurious radiation swept across the 140-160 MHz
 RF spectrum... this can bother television reception, amateur
 radio operators, and public service channels (police, fire, etc...)

I really doubt that such a device is possible, given the large
variety of things that you want to keep away, the things that
you DON'T want to bother, and the intelligence of many of these
things... rats learn VERY quickly to ignore ultrasonics,... just
like you probably don't notice the sound of your TV set after
a few mintues of watching.


Matthew Kaufman
(matthew@ucsck.ucsc.edu, ...!ucbvax!ucscc!ucsck!matthew)