Ultrasonic bug repellers are electronic gadgets that give off high-frequency sounds designed to fend off, hurt or kill home bugs, such as rodents and bugs. Whether they're actually effective at doing so has been challenged by screening laboratories and the U.S. Federal Trade Commission (FTC).
Left unchecked, rodents and pests can send salmonella, hantavirus and other diseases, in addition to cause substantial building damage. Signs of a rodent invasion include droppings, particularly near food and beneath sinks, chomped or chewed food packages, and holes in structural materials that can offer entry into the home.
How They Work
Using audible sound to discourage pests is an old method; the ancient Chinese utilized a variety of mechanically run sensory-repellent devices to prevent rodent invasions in agricultural crops and structures. Ultrasound, which is specified by sound frequencies beyond the upper limit of human hearing, has been utilized as pest control just over the past couple of years, however.
The ultrasonic gadgets are plugged into a home's electrical receptacle outlets which then supposedly give off high-frequency noises that are disruptive to pests. The sound supposedly triggers a physiological action called audiogenic seizure action, which is defined by non-directional running, convulsions, and potentially death from cerebral hemorrhage. The theory behind the devices is that baffled rodents eventually leave when the disruption prevents them from gathering food, reproducing, building nests or interacting. Ultrasonic devices are popular and enticing to consumers because of their ease of use and the fact that they are silent to human ears and allegedly get rid of the requirement for traps and poison, which are believed by some to be inhumane types of bug control. Electro-magnetic and subsonic gadgets are also readily available, and all designs differ by signal strength, rate and frequency.
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