Why People Use Ultrasonic Mouse Repellers In addition, families that have pets such as rabbits and hamsters should understand the negative effects these repellants can have. The frequency of electronic pest repellents doesn’t bother common family pets such as cats and dogs for the most part, but the volume can be disarming. However, the repelling factor of such a device is not simply based on the frequency it produces but the volume of the sound as well. This sound would ideally disturb rodents and drive them from the home yet be inaudible and harmless to humans. The logic behind an ultrasonic mouse repeller is that the device would produce a sound audible to rodents but not humans, due to the high frequency. Humans are not capable of hearing such high frequencies, although the sounds are audible to many animals-most of which can hear frequencies above 45 kilohertz. Generally, “ultrasound” indicates sounds at frequencies above 20 kilohertz. They differ in the frequency of ultrasonic sound ranges and the volumes at which they project the sounds. Most electronic pest repellents create high-pitched sounds (ultrasounds) that are intended to repel rodents and insects.
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