Do Ultrasonic Pest Repellers Work to Control Rats?

Do ultrasonic pest & rat repellers actually work? The claims made around ultrasonic sound producing machines were never substantiated.
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Do Electronic Rodent Repellents Really Work? - Permakill Exterminating

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Do Electronic Rodent Repellers Work? Not According To Experts

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Are Ultrasonic Pest Repellers Effective Pest Control?

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Do Ultrasonic Pest Repellers Work on Rats

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