But do these devices actually work? Ultrasonic pest repellers are devices that plug into an electrical outlet and, theoretically, emit a sound well outside of the frequency detectable by human ears.

If you're ready to sound the silent alarm and drive pesky invaders out of your house, then here's your chance to get a two-pack of Ultrasonic 360° Plug-in Pest Repellers on sale for $19.99 (reg.

Different frequencies repel different animals 5-Mode Animal Repeller for Choosing: The raccoon deterrent has 5-level to adjust, Level-1: Ultrasonic horn alarm sound drive, Level-2: The ultrasonic ...

10 Best Solar Ultrasonic Pest Repellers ... of the art ultrasonic technology which creates a powerful ultrasonic wave,accompanied at the same time by an alarm sound. Ultrasonic animal ...

Scientists have debated the purpose of the ultrasonic vocalizations (USVs) produced by rodents since the discovery of these sounds in the 1950s. There’s a wide research consensus suggesting USVs are a ...

A specialist in the biology of sound has made an incredible observation about the "Jedi" smell-powers of mice and rats. While depicted in cartoons and films as being squeaking little menaces, the ...

Is there some ultrasonic gadget that would keep them away? — Josh Swaney, Conyers A: Sound repellers have been tested almost invariably on rodents and insects — which are not analogous to dogs.

Ultrasonic pest repellents, such as Haycone Indoor Ultrasonic Repellent from Amazon emit sound waves at frequencies higher than what humans can hear, typically above 20 kHz. According to Nicole ...