🚀 go-pugleaf

In article <31929@buckaroo.mips.COM>, vaso@mips.COM (Vaso Bovan) writes:
> This is about cockroaches, fleas, mice, and assorted pests founds on pets
> and in restaurants.
> 
> There has been a lot of advertisement lately of "ultrasonic pest repellers."
> these are devices which emit ultrasonic sound which is supposed to annoy
> pests into leaving the pet/premises.
> 

I am unaware of any "US Army Testing" (which IMHO would be of dubious value),
but wish to point out that other countries (like Japan; where pesticides were
long-ago legislated out of use) use these things exclusively.  Alas, there is
a kicker!
Ultrasonic emitters ARE very irritating to rodents and insects BUT.....
only if they feature randomly waivering frequencies (very important).  The
el-cheapo models featured in so many ads, typically have a mono-tone output
which the undesireables "grow accustomed to" and return to normal operations.
The constantly changing frequency of the expensive units prevents the
undesireables from adapting to it.  They go away, and none come to take their
place (as long as you're "playing that awful music!").