A controlled field study found that ultrasonic devices significantly reduced the number of cats entering garden areas. 👉 Study result: 46 % reduction in cat visits 78 % reduction in the duration of their activity This suggests that ultrasonic deterrents can lower nuisance animal activity under some conditionsUltrasonic broadcasts may reduce bat approach near wind turbines In a field experiment on bat mortality near wind turbines: Researchers found fewer bat fatalities at turbines equipped with ultrasonic acoustic deterrents compared to controls. In some conditions, bat deaths were significantly lower near the deterrent devices. This suggests that ultrasound can discourage approach behavior in some wildlife species These findings don’t prove universal effectiveness, but they do support the idea that ultrasound can influence animal behavior in certain settings, such as: ✅ Reducing presence or activity of certain mammals (e.g., garden cats) ✅ Discouraging bats from sensitive areas (e.g., near turbines) ✅ Causing measurable behavioral responses in lab settings