Do ultrasonic rodent repellents work?
in a word, no. Ultrasonic devices have been tested both in laboratories and in the field and most of the results showed that these devices are not effective.12 The same goes for electronic, magnetic and vibration devices.5 In the 1980s, the Federal Trade Commission forced several companies to give refunds after charging them with false advertising.13 Furthermore, ultrasonic devices do not penetrate behind objects and mice quickly become accustomed to regular repeating sounds.
