Ultrasonic waves can repel rats. The explanation is as follows:

Working principle: The hearing range of the human ear is about 160,000-20,000 Hz, and the output frequency of the ultrasonic rat (cockroach) repeller is between 2 Above 10,000 Hz, humans cannot hear it, but mice and cockroaches are very sensitive and can make them feel irritated, panicked and uneasy until they flee.

The auditory system of rats is between 200Hz and 90000Hz. If a powerful high-power ultrasonic pulse can be used to effectively interfere and stimulate the auditory system of rats, it will become intolerable and panic. Restless, showing symptoms such as loss of appetite, escape, and even convulsions, so as to achieve the purpose of driving the rodents out of their range of activities.

Extended information:

Ultrasound is a sound wave with a frequency higher than 20,000 Hz. It has good directionality, strong penetrating ability, and is easy to obtain concentrated sound energy in water. It has a long propagation distance and can be used for distance measurement, speed measurement, cleaning, welding, gravel, sterilization and disinfection, etc. It has many applications in medicine, military, industry, and agriculture. Ultrasound gets its name because its lower frequency limit is greater than the upper limit of human hearing.

The ultrasonic rat repeller is a device that uses professional electronic technology design and years of scientific research on rats to develop a device that can generate 20kHz-55kHz ultrasonic waves. Ultrasound can effectively stimulate and cause rats to feel threatened and uneasy.