I'm forwarding this to the list per Tony's request:
---------
For some reason that I have not been able to determine, this will probably
go to you and not the list.
Feel free to post it out to the list if you don't see it come up.
Back in the 1970's I was involved in extensive research on the effect of
ultrasonic frequencies on rodents.
Our research showed that those frequencies (I used to know the exact range)
do affect mice, rats, squirrels and the like. It was best if the sound
emitted was of varying frequency and sound level (db). We also found that
different levels of sound affected rats and mice differently. Rats and mice
were are primary subjects as this was done for a company making such a
device for controlling rats and mice.
This research was done both in the field and at the University of Guelph
near Toronto, Canada. A doctor of science from a Toledo, OH University was
also involved but I have forgotten his name. I had to drive out there
several times.
I became quite good at setting up systems for deterring and controlling
rodents and I could walk into a space and sense if rodents were present.
It was my first and only job that I worked for someone other than myself. It
was 1974-1976.
Tony V
www.lotusowners.com
--------------
John
John T. Blair WA4OHZ email: jblair1948@cox.net
Va. Beach, Va
Phone: (757) 495-8229
48 TR1800 48 #4 Midget 65 Morgan 4/4 Series V (B1106)
75 Bricklin SV1 (#0887) 77 Spitfire 71 Saab Sonett III
65 Rambler Classic
Morgan: www.team.net/www/morgan
Bricklin: www.bricklin.org
If you can read this - Thank a teacher!
If you are reading it in English - Thank a Vet!!
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Shop-talk mailing list
http://autox.team.net/mailman/listinfo/shop-talk
http://www.team.net/archive
|