🚀 go-pugleaf

I have recently had some indirect exposure to these issues.  My
wife was contacted by the Attorney General's office here in Texas
for her professional opinion on a related device.  While discussing
the case with me she casually dropped the comment that ultrasonic
devices had been examined by the FTC and found to be ineffective.
I don't know any exact references, but I suspect that the FTC
would (provided I understood the comment correctly).  The major
point was that while sufficiently high levels of ultrasonics would
bother many pests, it was relatively easy for them to shield themselves
in a variety of ways (mostly by getting something between them
and the source).  The end result was that the commercially available
devices would not protect you against pests under realistic conditions.


-- 
 I'm not afraid of dying     Ethan Vishniac, Dept of Astronomy, Univ. of Texas
 I just don't want to be     {charm,ut-sally,emx,noao}!utastro!ethan
 there when it happens.      (arpanet) ethan@astro.AS.UTEXAS.EDU
    - Woody Allen            (bitnet) ethan%astro.as.utexas.edu@CUNYVM.CUNY.EDU

These must be my opinions.  Who else would bother?