Scientific Studies on the Effectiveness of Ultrasonic Pest Deterrents
Last updated: May 3rd, 2026
Overview
Ultrasonic devices are presented as a non-invasive solution for pest management. They emit high-frequency sounds that are largely inaudible to humans but can disturb many animal species. These devices are used in a wide range of contexts, from residential gardens to urban environments, to deter rodents, mammals, birds and certain insects.
Several peer-reviewed studies and expert reviews have investigated their efficacy. Research findings vary depending on the target species, device design, frequency range, placement and environmental conditions. Effectiveness is generally documented for species with confirmed sensitivity to high-frequency sound, such as cats, dogs, deer and rodents. For species with limited ultrasonic sensitivity, such as birds and most insects, ultrasonic emission alone is less reliable, and complementary mechanisms such as bright LED flashes or seismic vibrations are often required to achieve a deterrent effect.
This page summarizes the published research that informs the design of our products and provides honest, transparent context on what the science currently supports.
General Reviews
Schumake — Electronic Rodent Repellent Devices
Stephen A. Schumake, in his review of electronic rodent repellent devices, acknowledges that ultrasonic emission can disrupt the behavior of rodents and lead them to avoid treated areas. The review highlights two key conditions for success: proper placement of the device relative to rodent activity zones, and consistent operation over time. Variability in device design and frequency calibration is identified as a major source of differences in field outcomes.
Reference: Schumake, S. A. Electronic Rodent Repellent Devices: A Review of Efficacy Test Protocols and Regulatory Actions. USDA National Wildlife Research Center, DigitalCommons University of Nebraska–Lincoln. https://digitalcommons.unl.edu/nwrcrepellants/34/
Aflitto & DeGomez — University of Arizona Cooperative Extension
A review by the University of Arizona Cooperative Extension examined ultrasonic pest repellent devices across multiple species. The review concludes that ultrasonic devices can be effective when correctly matched to the target species, properly positioned and maintained over time. It emphasizes that frequency selection and coverage area are critical parameters, and that effectiveness is highly species-dependent.
Reference: Aflitto, N., & DeGomez, T. (2014). Sonic Pest Repellents. University of Arizona Cooperative Extension. https://repository.arizona.edu/handle/10150/333139
Panthawong et al. — Ultrasonic Devices for Insect Control
A 2021 review by Panthawong and colleagues, published in Insects, examined the available evidence on ultrasonic devices marketed for insect control (mosquitoes, cockroaches and others). The authors conclude that scientific evidence supporting ultrasonic deterrence of insects remains limited and inconsistent, and that for most insect species there is no robust laboratory or field evidence of repellency from ultrasonic emission alone. This is one of the reasons our product range does not rely on ultrasound as a primary mechanism for insect control.
Reference: Panthawong, A., Doggett, S. L., & Chareonviriyaphap, T. (2021). The Efficacy of Ultrasonic Pest Repellent Devices. Insects, 12(5), 400. https://doi.org/10.3390/insects12050400
By Species
Cats
Nelson, Evans and Bradbury conducted a double-blind field study in the United Kingdom to test the efficacy of an ultrasonic cat deterrent in residential gardens. The study used a paired-garden design, where some gardens were equipped with active devices and others with inactive control devices, and cat visits were monitored over multiple weeks. The researchers observed that ultrasonic deterrents can reduce cat intrusions into protected gardens, while also noting that effects vary depending on individual cat behavior, environmental conditions and device placement.
Reference: Nelson, S. H., Evans, A. D., & Bradbury, R. B. (2006). The efficacy of an ultrasonic cat deterrent. Applied Animal Behaviour Science, 96(1–2), 83–91. https://doi.org/10.1016/j.applanim.2005.05.005
Rodents (Rats and Mice)
Sousa-Guedes and colleagues tested ultrasonic devices in a road traffic context, evaluating whether continuous ultrasonic emission could keep rodents away from road verges in order to reduce wildlife-vehicle collisions. The study, conducted in a natural outdoor environment, observed a measurable disruption of rodent activity in the treated zones. The authors concluded that ultrasonic emission can contribute to deterring rodents from defined areas when properly deployed.
Reference: Sousa-Guedes, D., Ribeiro, H., Vaz-Freire, M. T., Mira, A., & Sillero, N. (2020). Ultrasonic device effectiveness in keeping rodents off the road. European Journal of Wildlife Research, 66(1). https://doi.org/10.1007/s10344-020-1361-8
Birds (including Pigeons)
Pigeons and most bird species have a hearing range that is significantly lower than that of mammals such as cats or rodents, with upper limits typically below 10 kHz. As a result, the deterrent effect of pure ultrasound on birds is more limited than on ultrasound-sensitive mammals. However, birds possess an exceptionally well-developed visual system, with photoreceptor density, color sensitivity and flicker perception substantially higher than humans. This is why our bird deterrent products combine high-frequency sound emission with bright LED flashes, which act as the primary visual deterrent.
Haag-Wackernagel investigated the behavioral responses of feral pigeons to a range of deterring systems in urban environments. The study reports that pigeons may persist in returning to familiar areas during an initial adaptation period due to strong territorial behavior, before progressively avoiding zones associated with consistent discomfort. The findings underline that for bird deterrents, continuous operation and combination of multiple stimuli (visual and acoustic) yield better long-term results than ultrasound alone.
Reference: Haag-Wackernagel, D. (2000). Behavioural responses of the feral pigeon (Columbidae) to deterring systems. https://www.researchgate.net/publication/292300376_Behavioural_responses_of_the_feral_pigeon_Columbidae_to_deterring_systems
Fitzwater also reviewed methods used to manage urban bird problems and noted that no single deterrent provides immediate or universal results, and that combined and persistently applied methods are more reliable than isolated ones.
Reference: Fitzwater, W. D. (1988). Solutions to Urban Bird Problems. Proceedings of the Vertebrate Pest Conference, 13. https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1051&context=vpcthirteen
Ultrasonic Device Effectiveness Report by Species
Based on the available scientific literature, our internal field testing and customer feedback, we have built the following effectiveness assessment for our product range. Scores reflect the combined effect of ultrasonic and visual stimuli (LED flashes) where applicable to the device. The pure ultrasonic effect alone may differ from the figures shown below, particularly for species with limited high-frequency hearing.
| Species | Effectiveness (0–5) | Comment |
|---|---|---|
| Cat | 4 | Strong response to high-frequency sound, especially when paired with motion detection. |
| Dog | 4 | Sensitive hearing range. Particularly effective on non-resident dogs entering the area. |
| Raccoon | 4 | Responds well to ultrasound; significantly improved when combined with LED flash. |
| Opossum | 4 | Nocturnal mammal often disturbed by ultrasonic emission; flashes reinforce the effect. |
| Skunk | 4 | Sensitive to ultrasonic frequencies; LED flashes increase reliability. |
| Deer | 4 | Good deterrent effect in gardens, particularly with combined LED flashes. |
| Rat / Mouse | 3 | Sensitive to ultrasound; used in rodent control for decades. Adaptation period applies; LED flashes reinforce effect, especially in confined spaces. |
| Squirrel | 3 | Disturbed by ultrasound; habituation can occur if frequency is not variable. |
| Fox | 3 | Variable response. LED flashes substantially improve consistency. |
| Lizard | 3 | Field results observed; rigorous scientific data limited. |
| Frog / Toad | 3 | Field results observed; rigorous scientific data limited. |
| Pigeon | 3 | Limited ultrasonic sensitivity. Effectiveness primarily driven by LED flashes; ultrasound acts as a complementary layer. |
| Rabbit | 3 | Variable response. LED flashes improve effect. |
| Mole / Vole | 2 | Aerial ultrasound is not very effective; seismic vibration is more suitable. Our mole repeller uses seismic technology. |
| Snake | 2 | Aerial ultrasound has limited effect; seismic vibration is more suitable. Our snake repeller uses seismic technology. |
| Wild Boar | 2 | Limited reliable data. Reactions reported but not systematic. |
| Badger | 2 | Occasional reaction, but tends to return after habituation. |
| Cockroach | 2 | Effects possible on some species; scientific evidence limited. |
| Seagull / Goose | 1 | Visual deterrents and audible noises generally more effective than ultrasound. |
| Hedgehog | 1 | Little to no observed effect. |
| Ant | 1 | Limited reaction; vibrations more relevant than ultrasound. |
| Mosquito | 1 | No solid scientific evidence supporting ultrasonic deterrence. |
| Gnat / Fly | 1 | No solid scientific evidence supporting ultrasonic deterrence. |
| Wasp | 0 | No proven effect. Ultrasound not suitable. |
| Bee | 0 | No proven effect. Ultrasound not suitable. |
| Caterpillar | 0 | No proven effect. Ultrasound not suitable. |
| Slug / Snail | 0 | Studies indicate ultrasound is ineffective. |
| Shark | 0 | Sharks respond primarily to electromagnetic fields; ultrasound is not suitable. |
Adaptation Period and Effectiveness Over Time
When ultrasonic repellents are deployed, target animals typically require a period of adaptation before consistent avoidance behavior is observed. During this adaptation period, the animal progressively associates the ultrasonic emission with sustained discomfort and gradually starts to avoid the protected zone. Territorial species, in particular, may persist in returning to familiar areas during the first weeks of operation.
Rodents
Schumake's review of electronic rodent repellent devices reports that rats can take up to three to four weeks to modify their behavior in response to ultrasonic emission. During the adaptation period, rodents may continue to enter or explore protected areas before associating the noise with persistent discomfort and progressively avoiding it.
Reference: Schumake, S. A. Electronic Rodent Repellent Devices: A Review of Efficacy Test Protocols and Regulatory Actions. https://digitalcommons.unl.edu/nwrcrepellants/34/
Meehan's classic work on rat behavior and control similarly highlights that the effect of ultrasonic deterrents is typically not immediate. Rats display gradual habituation patterns and adopt avoidance behavior progressively rather than instantly.
Reference: Meehan, A. P. (1984). Rats and Mice: Their Biology and Control. Rentokil Ltd, East Grinstead.
Cats
The effectiveness of ultrasonic cat deterrents tends to increase over time as cats progressively associate the protected area with discomfort. More cautious cats may avoid the area almost immediately, while bolder, more territorial cats may require multiple encounters before consistently avoiding the zone. Over weeks of continuous operation, the frequency and duration of cat visits typically decrease.
Slater's work on the welfare of feral cats notes that stray cats are highly attached to their territories, and even in the presence of stressors they may persist in staying for several weeks before relocating.
Reference: Slater, M. R. (2007). The Welfare of Feral Cats. In: Rochlitz, I. (eds), The Welfare of Cats. Animal Welfare, vol 3. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-3227-1_6
Pigeons
Haag-Wackernagel reports that pigeons may take two to four weeks to modify their behavior in response to deterring systems. Strong territorial attachment can lead pigeons to return repeatedly to familiar areas during the initial adaptation period before progressively avoiding zones associated with consistent discomfort. Combined visual and acoustic deterrents shorten this adaptation period in field conditions.
Reference: Haag-Wackernagel, D. (2000). Behavioural responses of the feral pigeon (Columbidae) to deterring systems. https://www.researchgate.net/publication/292300376_Behavioural_responses_of_the_feral_pigeon_Columbidae_to_deterring_systems
Practical Recommendations
Based on the literature and our own field testing, the following best practices substantially improve the effectiveness of ultrasonic deterrents:
- Continuous operation. Ultrasonic and visual deterrents work best when active around the clock, including at night. This allows target animals to associate the protected area with consistent discomfort and to progressively integrate avoidance behavior into their daily routine.
- Proper placement. Devices should be positioned facing the area to protect, with no major obstructions blocking the sound or light path. Mounting height and angle have a measurable effect on coverage.
- Patience during adaptation. Most species require several weeks of exposure before consistent avoidance is observed. Initial visits or sightings during the first weeks do not indicate failure.
- Combined stimuli. Devices combining ultrasound and LED flashes generally outperform single-stimulus devices for species with limited ultrasonic sensitivity such as birds.
- Frequency variation. Variable-frequency devices reduce habituation, especially in intelligent species such as squirrels, foxes and birds.
Disclaimer
The studies cited on this page provide context and supporting evidence regarding the effectiveness of ultrasonic and combined ultrasonic-visual pest deterrents under specific conditions. Results may vary depending on:
- Pest species and individual animal behavior
- Environmental factors (weather, surrounding habitat, food availability)
- Device placement, orientation and maintenance
- Frequency calibration and operating mode
- Population pressure and territorial dynamics
Sonic Barrier products are designed to deter pests, not to eliminate them. Field results in real-world conditions may differ from laboratory studies. Sonic Barrier makes no guarantee of complete pest elimination.
The information presented on this page is provided for educational and informational purposes only and does not constitute scientific or regulatory endorsement. Sonic Barrier products have not been evaluated by the U.S. Federal Trade Commission (FTC), the U.S. Environmental Protection Agency (EPA), or any equivalent regulatory body.
Please read our full Disclaimer carefully before using our website or purchasing our products.