15000hz, 17500hz & 20000hz Ultrasonic Ultimate Extreme Mouse And Rat Repellent (11 1 2 Hours) -

This is the threshold of ultrasound, generally inaudible to most adults but well within the hearing range of mice and rats.

The YouTube video titled is a marathon-length audio track designed to deter rodents through high-frequency sound. Despite the "extreme" branding and millions of views, its effectiveness is a subject of significant scientific and practical debate. Key Features of the "Extreme" Repellent Track This is the threshold of ultrasound, generally inaudible

Electronic Rodent Repellent | Ultrasonic Mouse Repellent - Orkin This is the threshold of ultrasound

While the theory suggests these sounds create an "unbearable" environment for pests, real-world results are often underwhelming: This is the threshold of ultrasound, generally inaudible

These are technically "high-frequency" rather than ultrasonic (which begins at 20kHz). Younger humans with sensitive hearing may find these frequencies highly irritating or even painful.