FREE delivery on orders over $42

Do ultrasonic pest repellers work on squirrels?

A multi-faceted approach, considering alternative methods and continuous monitoring, may provide a more robust solution to managing our squirrelly visitors.

July 24, 2024

4 min read time

Why you can trust us

This information is reviewed by an independent pest control expert.

All external links are non-affiliated and for informational purposes only 

Do ultrasonic pest repellers work on squirrels

Have you ever been driven nuts by squirrels chewing on your attic insulation or feasting on your garden plants?

If so, you might have come across the idea of using ultrasonic pest repellers.

This techy solution sounds almost too good to be true—just plug it in, and your squirrel problem dissipates with those high-pitched sound waves.

But do they really work?

Let’s dive into this topic and find out!

What Are Ultrasonic Pest Repellers?

Ultrasonic pest repellers are devices designed to emit sound waves at frequencies that are supposed to be intolerable to pests like rodents, insects, and even squirrels.

The idea is that these sound waves, which are typically above 20 kHz (the upper limit of human hearing), will cause discomfort and drive the pests away.

How Do Ultrasonic Pest Repellers Work?

These devices typically operate using a simple mechanism:

  1. Power Source: Most ultrasonic repellers are either plug-in units that you connect to a wall outlet or battery-operated models.
  2. Emittance of Sound Waves: The device emits high-frequency sound waves that are believed to be annoying or even painful to pests.
  3. Continuous or Intermittent Operation: Some units work continuously, while others operate intermittently to prevent pests from getting accustomed to the sound.
ultrasonic pest repeller with strobe light

Claims and Advertisements

Manufacturers often claim that these devices can:

  • Repel a variety of pests including rodents, birds, and squirrels.
  • Be safe and non-toxic.
  • Require minimal maintenance.

But how accurate are these claims? Let’s look at some real-world applications and examine how effective ultrasonic repellers are when it comes to squirrels.

Are Squirrels Affected by Ultrasonic Sound?

The Science Behind Ultrasonic Repellers and Squirrels

Squirrels, like many rodents, have a keen sense of hearing.

They can detect high-frequency sounds, which supports the idea that ultrasonic devices might be bothersome to them.

However, the effectiveness of such devices in repelling squirrels remains controversial and largely debated.

Mixed Results in Studies

Studies and user experiences offer mixed results:

  1. Success Stories: Some users report a decrease in squirrel activity around their homes and gardens after installing ultrasonic repellers.
  2. Lack of Impact: Other users see no change at all and still have to deal with the same level of squirrel infestation.

Factors Influencing Effectiveness

Several factors can affect how well these devices work:

  • Frequency and Intensity: Not all ultrasonic repellers emit the same frequency or sound intensity. Some may be more effective than others.
  • Environment: The effectiveness can be influenced by the specific layout of your property, the presence of barriers like walls, furniture, and even the materials used in your home’s structure.
  • Adaptation: Squirrels may grow accustomed to the sound if it’s constant, reducing the device’s effectiveness over time.

Pros and Cons of Using Ultrasonic Pest Repellers for Squirrels

Let’s weigh the benefits and drawbacks to give you a clearer picture.


  • Chemical-Free: These devices offer a non-toxic alternative to traditional pest control methods.
  • Ease of Use: Simply plug in the device, and you’re all set.
  • Multi-Pest Repellent: Some devices claim to repel a wide variety of pests, offering broader protection.


  • Inconsistent Results: The effectiveness is often hit-or-miss, with success varying widely.
  • Temporary Solution: Even if the device works, it’s often a temporary fix. Squirrels might return once they adapt to the sound or the device is turned off.
  • Limited Range: Ultrasonic waves don’t travel through walls and might not cover a large area effectively.

Alternatives to Ultrasonic Pest Repellers

If you’re on the fence about trying ultrasonic repellers, there are several other methods to consider.

Physical Barriers

  • Wire Mesh: Installing wire mesh around openings and garden beds can block squirrels from accessing these areas.
  • Chimney Caps: Secure your chimney to prevent squirrels from using it as an entry point.

Natural Repellents

  • Peppermint Oil: Squirrels dislike the strong scent. Soak cotton balls in peppermint oil and place them in areas where squirrels are frequent.
  • Fox Urine: Available in garden stores, this natural predator scent can deter squirrels.


  • Live Traps: Humanely capture and relocate squirrels.
  • Snap Traps: Effective but less humane, so use them with caution and always check local wildlife regulations.


So, do ultrasonic pest repellers work on squirrels?

The answer is a bit fuzzy.

While there’s some evidence that these devices can deter squirrels, they are not a guaranteed solution.

The results can be highly variable and are influenced by a multitude of factors.

If you decide to give it a try, keep in mind that it should be part of a broader pest control strategy.

In summary, while ultrasonic repellers are a convenient, chemical-free option, don’t be surprised if you need to explore additional methods to keep those pesky squirrels at bay.

If you have any questions or need more tailored advice, don’t hesitate to leave a comment on our forum. Happy pest-free living!

Latest Comments

  1. How long does it take for ultrasonic pest repellers to work on squirrels?

  2. If effective, ultrasonic pest repellers may start deterring squirrels within a few days to a couple of weeks. Consistent use is typically necessary to maintain the deterrent effect.

  3. What is the recommended placement for ultrasonic pest repellers to deter squirrels?

  4. For best results, ultrasonic pest repellers should be placed where squirrels are frequently seen or where they enter the property, ensuring that the device’s emissions cover those areas.

  5. Will weather conditions affect the performance of ultrasonic pest repellers?

  6. Extreme weather conditions, such as heavy rain or snow, may affect the performance of outdoor ultrasonic pest repellers. Weatherproof models are recommended for outdoor use.

  7. Can ultrasonic pest repellers be used both indoors and outdoors to repel squirrels?

  8. There are specific models designed for indoor or outdoor use. Make sure to choose a repeller suited for the environment where you intend to deter squirrels.

  9. What should I do if the ultrasonic pest repeller does not work on the squirrels?

  10. If the device does not deter squirrels, consider integrating other methods of pest control, such as habitat modification, sealing entry points, or consulting with a professional pest control service.

Click to leave a comment

25 more replies

Who's chatting?

Avatar for MouseHater22 Avatar for NightFlyer3 Avatar for EcoWarrior Avatar for MikeInMN Avatar for TechieTina Avatar for BatWoman52 Avatar for natureguy5 Avatar for GreenThumbGal1 Avatar for Patricia Avatar for CaveDweller666 Avatar for GardenGuardian Avatar for UrbanDweller476 Avatar for CityCritter Avatar for GreenThumbGal Avatar for SkepticalSam2 Avatar for SappySquirrel Avatar for TechieTina9 Avatar for SuburbanSoldier Avatar for HouseHunter Avatar for CuriousCat Avatar for TechTom Avatar for UltrasonicHero Avatar for UrbanDweller47 Avatar for NatureLover92