This is at the edge of human hearing (often audible to children and young adults as a high-pitched whine) but is piercingly loud to rodents.
These frequencies transition into the ultrasonic range. To a rodent, these sounds are akin to a loud, relentless siren. Because rodents use sound for communication and predator detection, this "acoustic stress" makes the environment feel unsafe and uncomfortable. The Benefit of 11.5 Hours This is at the edge of human hearing
Mice and rats have a much broader hearing range than humans, extending well into the ultrasonic spectrum (up to 70–90 kHz). Because rodents use sound for communication and predator
Use this audio in conjunction with physical barriers. While the sound drives them out, sealing entry points with steel wool or caulk ensures they can't return once the audio is turned off. While the sound drives them out, sealing entry