Mice and rats have a much broader hearing range than humans, extending well into the ultrasonic spectrum (up to 70–90 kHz).
The extended duration is the most critical feature. Short bursts of sound are rarely effective because rodents are adaptable; they will simply hide until the noise stops. An 11.5-hour loop covers the entire duration of their peak nocturnal activity. By maintaining constant pressure through the night, the audio disrupts their ability to forage, communicate, and nest, eventually forcing them to seek a quieter habitat. Best Practices for Use Mice and rats have a much broader hearing
Use the audio consistently for several nights. Ultrasonic repellents are most effective as a "slow burn" deterrent rather than an instant fix. Mice and rats have a much broader hearing