Ultrasonic pest repellers are electronic gadgets that produce high-frequency noises developed to ward off, hurt or eliminate household pests, such as rodents and insects. Whether they're in fact effective at doing so has been disputed by screening laboratories and the U.S. Federal Trade Commission (FTC).
Left untreated, rodents and pests can send salmonella, hantavirus and other illness, as well as cause substantial building damage. Indications of a rodent problem include droppings, especially near food and below sinks, gnawed or chewed food packages, and holes in structural products that can supply entry into the house.
How They Work
Using audible sound to prevent insects is an old strategy; the ancient Chinese utilized a variety of mechanically operated sensory-repellent gadgets to discourage rodent invasions in farming crops and buildings. Ultrasound, which is specified by sound frequencies beyond the upper limit of human hearing, has actually been utilized as insect control only over the past few decades, however.
The ultrasonic devices are plugged into a home's electrical receptacle outlets which then purportedly give off high-frequency noises that are disruptive to bugs. The sound apparently causes a physiological reaction referred to as audiogenic seizure action, which is identified by non-directional running, convulsions, and possibly death from cerebral hemorrhage. The theory behind the devices is that confused rodents eventually flee when the interruption avoids them from collecting food, reproducing, constructing nests or communicating. Ultrasonic gadgets are popular and appealing to customers because of their ease of use and the fact that they are silent to human ears and presumably eliminate the requirement for traps and toxin, which are believed by some to be inhumane kinds of insect control. Electromagnetic and subsonic gadgets are likewise offered, and all styles vary by signal strength, rate and frequency.
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