Ultrasonic pest repellers are electronic gadgets that give off high-frequency noises created to drive away, hurt or kill household pests, such as rodents and bugs. Whether they're really reliable at doing so has actually been challenged by screening labs and the United States Federal Trade Commission (FTC).
Left unattended, rodents and bugs can send salmonella, hantavirus and other diseases, along with cause considerable building damage. Signs of a rodent problem include droppings, particularly near food and underneath sinks, munched or chewed food packages, and holes in structural materials that can provide entry into the house.
How They Work
Making use of audible noise to hinder insects is an old method; the ancient Chinese utilized a variety of mechanically run sensory-repellent devices to hinder rodent infestations in farming crops and buildings. Ultrasound, which is specified by sound frequencies beyond the upper limit of human hearing, has actually been used as bug control only over the past few decades, however.
The ultrasonic gadgets are plugged into a house's electrical receptacle outlets which then supposedly discharge high-frequency noises that are disruptive to pests. The sound allegedly causes a physiological reaction called audiogenic seizure response, which is defined by non-directional running, convulsions, and potentially death from cerebral hemorrhage. The theory behind the gadgets is that confused rodents eventually get away when the disruption prevents them from collecting food, breeding, developing nests or interacting. Ultrasonic devices are popular and enticing to consumers because of their ease of use and that they are silent to human ears and allegedly eliminate the requirement for traps and poison, which are thought by some to be inhumane forms of insect control. Electro-magnetic and subsonic gadgets are likewise available, and all designs vary by signal strength, rate and frequency.
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