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Do ultrasonic pest repellers work on roaches?

Roaches may be one of the hardest things to get out of your home. Once you can get rid of them, your home would definitely feel better

December 10, 2021

3 min read time

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This information is reviewed by an independent pest control expert.

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Ah, roaches. No one wants them, yet they always seem to find a way into our homes.

With an array of solutions available from traps to chemical sprays, it’s no wonder people are turning to more tech-savvy options like ultrasonic pest repellers.

But do they really work?

Let’s dive in to find out.

What Are Ultrasonic Pest Repellers?

Ultrasonic pest repellers are electronic devices designed to emit high-frequency sound waves.

These sound waves are intended to repel or deter pests like mice, rats, and insects, including roaches.

How They Work

These devices generate ultrasonic frequencies generally ranging from 20 kHz to 65 kHz.

Humans can’t hear these frequencies, but some pests can.

The idea is that the ultrasonic noise is intolerable to pests and will drive them away.

How Do Roaches Perceive Sound?

Roaches don’t have ears like humans.

Instead, they have tiny sensory hairs on their body that can detect vibrations in the air.

So, theoretically, they should be able to sense the high-frequency sounds emitted by ultrasonic repellers.

Scientific Studies on Ultrasonic Repellers and Roaches

To date, the scientific community remains divided on the effectiveness of ultrasonic pest repellers.

Some studies suggest a minor effect on roach activity, while others find no significant impact.

Efficacy Tests

Several lab tests have been conducted, and the results are inconclusive.

In many cases, roaches initially show some aversion but eventually adapt to the noise.

Consumer Reports

Anecdotal evidence suggests that results vary widely.

Some users claim great success, while others see no difference. The consensus is that ultrasonic pest repellers are not a standalone solution but may contribute to overall roach control when used in conjunction with other methods.

Pros and Cons


  • Chemical-free
  • Safe for humans and most pets
  • Low ongoing costs


  • Inconsistent results
  • May not work for significant infestations
  • Requires electricity

Alternatives to Ultrasonic Pest Repellers

  • Chemical sprays
  • Roach traps
  • Professional pest control services

Safety Considerations

Ultrasonic pest repellers are generally considered safe for humans and household pets like cats and dogs.

However, the safety of these devices for smaller pets like hamsters or reptiles has not been well-studied.


While the jury is still out on the effectiveness of ultrasonic pest repellers for roaches, they may be worth a try as part of a more comprehensive pest control strategy.

Just don’t expect them to be a silver bullet.


  1. Can I use ultrasonic pest repellers if I have pets?
    • Generally, yes for cats and dogs, but caution is advised for smaller pets.
  2. Can ultrasonic pest repellers harm humans?
    • There is no evidence to suggest they harm humans.

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