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And annoy pets? I had some failing electrical gear that produced extremely high frequencies. Drove the dogs a little crazy until I found it.
by emmelaich 7y ago
And annoy pets? I had some failing electrical gear that produced extremely high frequencies.
Drove the dogs a little crazy until I found it.
- TeMPOraL 7y agoNot annoy, but learn more about them. The original idea of investigating ultrasound environment came to me when I was taking care of some rats for a few weeks for a friend; I read a short book on them, from which I've learned that they communicate with ultrasound, which made me want to "listen in" on that communication, and perhaps replay some of it. FWIW, I have a cat myself, and I'm not the kind of person to annoy animals on purpose.
- tripzilch 7y agoI'm not very good with electronics, but someone who is showed me this cool device they built themselves. It was something like a "frequency-lowerer" (NO idea how that works, I know DSP but not the analog stuff) and the intended use was to be able to hear the screeches of bats. One way to test it was to jingle a bunch of keys in front of its mic, the metal clanging has a lot of ultrasound. I dunno how hard they are to build (that guy was pretty skilled), but I think you can also just buy these devices ready made. Probably called "bat detectors" or something.