Electronic pest control is the name given to any of several types of electrically powered devices designed to repel or eliminate pests, usually rodents or insects.

Ultrasonic
Ultrasonic gadgets work through producing short frequency, high recurrence sound waves that are excessively high in pitch to be heard by the human ear (for the most part acknowledged to be frequencies more noteworthy than 20,000 Hz). Humans are typically incapable to hear sounds higher than 20 kHz because of physiological confinements of the cochlea, however there is impressive variety between people, particularly at such high frequencies. A few creatures, for example, bats, Insects, and rodents, can hear well into the ultrasonic range. Some creepy crawlies, for example, grasshoppers and beetles, can identify frequencies from 50,000 Hz to 100,000 Hz, and lacewings and moths can recognize ultrasound as high as 240,000 Hz delivered by bug chasing bats. In spite of prevalent thinking, winged creatures can’t hear ultrasonic sound. Some cell phone applications endeavor to utilize this innovation to deliver high recurrence sounds to repulse mosquitoes and different bugs, yet the cases of adequacy of these applications and of ultrasonic control of bug animals as a rule has been addressed.

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