I’ve experimented with ultrasonic repellents aimed at squirrels, and although I noticed a temporary change in their behavior, the effect didn’t last long. It might be more about novelty than a true deterrent.
I’m skeptical about a single frequency being a magic bullet for repelling squirrels. Their intelligence might mean they quickly adapt to the sound, rendering it ineffective over time.
Has anyone found any scientific research on this? It would be great to see some studies measuring how different frequencies actually affect squirrel behavior in a controlled setting.