How does a mouse and rat repeller work? - briefly
It generates ultrasonic frequencies and, in some models, high‑frequency vibrations that rodents find distressing, prompting them to leave the vicinity. The device operates continuously, creating an environment that rodents instinctively avoid without harming humans or pets.
How does a mouse and rat repeller work? - in detail
Rodent deterrent devices rely on three primary mechanisms: ultrasonic emission, electromagnetic fields, and vibration.
Ultrasonic emission generates sound waves above 20 kHz, a frequency range that rodents perceive as uncomfortable. The device contains a piezoelectric transducer that converts electrical energy into high‑frequency oscillations. These waves propagate through the air and, when reflected off surfaces, create a standing‑wave pattern that blankets the targeted area. Because humans cannot hear frequencies above the audible threshold, the system remains silent to occupants while delivering a continuous aversive stimulus to mice and rats.
Electromagnetic field (EMF) generators produce low‑intensity, high‑frequency magnetic pulses. A coil surrounding the device induces alternating magnetic flux, which penetrates the rodent’s nervous system. The rapidly changing field interferes with the animal’s vestibular and auditory receptors, causing disorientation and stress. The field strength is calibrated to avoid hazardous exposure for humans and domestic pets while remaining disruptive to small mammals.
Vibration modules employ an eccentric rotating mass or a linear resonant actuator to create subtle tremors in the surrounding structure. The vibrations travel through walls, floors, and ceilings, delivering a tactile disturbance that rodents find intolerable. The frequency and amplitude are tuned to maximize impact on the target species without causing noticeable shaking for humans.
Most commercial units combine at least two of these technologies to increase efficacy and reduce the likelihood of habituation. Power is supplied either by mains electricity with a built‑in transformer or by rechargeable batteries, allowing placement in locations without convenient outlets. Safety features typically include automatic shut‑off after a preset runtime, thermal protection, and low‑voltage operation to prevent electrical hazards.
Maintenance involves periodic cleaning of the transducer surface to remove dust and debris that can attenuate ultrasonic output, checking battery charge levels, and verifying that the device remains securely mounted to maintain consistent vibration transmission. Replacement intervals for the internal components range from six months to two years, depending on usage intensity and environmental conditions.