Discussion in 'News' started by btarunr, Dec 14, 2012.
Heh, it's been a while
nice! so thats how it works. if they can vibrate it out of the audible range it would be silent!
I wonder how dogs and cats get a long with these, it might be along the same lines as a dog whistle!
those are ultrasonic. dont thing these will be able to do more than a couple of hundred hertz
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