What are the potential side effects of using an ultrasonic pest repeller?

Written by Editorial Team | Last Updated: August 2026

Ultrasonic pest repellers are generally marketed as safe, chemical-free alternatives to traditional extermination methods because they emit high-frequency sound waves designed to annoy rodents and insects without using toxic substances. In terms of direct physical side effects on humans, most adults cannot hear high-frequency ultrasonic sounds, but some individuals—particularly children and younger adults with sensitive hearing—report experiencing minor side effects such as persistent headaches, ear discomfort, mild tinnitus, or general irritability when occupying enclosed rooms with active devices. Additionally, households keeping domestic pets like hamsters, guinea pigs, or mice will find that these devices cause severe stress and distress to caged rodent pets.

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