Ultrasonic devices, also known as electronic pest repellers, are marketed as a way to repel rats and other pests using high-frequency sound waves that are inaudible to humans.
However, the effectiveness of ultrasonic devices is highly debated, and there is limited scientific evidence to support their claims. Some studies suggest that ultrasonic devices may have a temporary effect on rats, causing them to move away from the immediate area where the device is installed.
The problem is that rats can quickly become used to the sound, rendering the devices ineffective over time. Additionally, rats can easily adapt to their environment and may learn to tolerate or ignore the ultrasonic frequencies.