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Why Can You Hear Your Ultrasonic Pest Repeller? Unraveling the Mystery and Finding Solutions

Discover why you can hear your ultrasonic pest repeller. Understand the causes and find expert solutions to address the issue effectively.

May 18, 2023

4 min read time

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This information is reviewed by an independent pest control expert.

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Ultrasonic pest repellers have emerged as a popular choice for those seeking an alternative approach to pest control.

These devices emit high-frequency sound waves that are designed to repel pests without being audible to humans.

However, it can be quite perplexing when you find yourself able to hear these supposedly ultrasonic sounds.

In this article, we will delve into the reasons behind this occurrence and provide expert solutions to address this issue effectively.

Ultrasonic pest repellers are ingenious electronic devices created to emit high-frequency sound waves that are beyond the range of human hearing.

These sound waves, typically falling between 20,000 to 60,000 Hertz, are intended to disturb pests like rodents, insects, and spiders while remaining imperceptible to humans.

Human Auditory Range:

In order to comprehend why some individuals can hear the ultrasonic sounds produced by pest repellers, we must first grasp the normal human auditory range.

Generally, humans can perceive sounds within the range of 20 Hertz (Hz) to 20,000 Hz.

Any sounds beyond this threshold are considered ultrasonic and are typically not detectable to us.

However, it is important to note that certain factors can influence individual hearing capabilities..

Factors Influencing Audibility:

Various factors contribute to the audibility of ultrasonic sounds emitted by pest repellers, and these can differ from person to person.

Let’s explore some of these factors:


  • As we grow older, our ability to hear higher frequencies diminishes.

Therefore, younger individuals may be more likely to perceive ultrasonic sounds compared to older individuals.


  • Some individuals possess a heightened sense of hearing or increased sensitivity to high-frequency sounds.

    Consequently, they may be more susceptible to detecting sounds that others cannot.

Individual Variations:

  • Each person has a unique auditory threshold, and what may be inaudible to one individual could be audible to another due to inherent variations in hearing capabilities.

Device Quality and Frequency Range:

The audibility of an ultrasonic pest repeller can also be influenced by the quality of the device itself.

Lower-cost or poorly constructed repellers may emit sounds at frequencies closer to the upper limit of human hearing, making them more likely to be audible.

Solutions for Audible Ultrasonic Pest Repellers:

If you find yourself able to hear the ultrasonic sounds produced by your pest repeller and wish to resolve this issue, consider the following expert solutions:

Reposition the Device:

  • Try relocating the repeller to a different area, as factors like distance, room layout, and materials can impact the transmission of sound waves. Experiment with different placements to find the optimal position.

Adjust Power or Volume:

  • Certain pest repellers offer options to adjust the intensity or volume of the ultrasonic sounds.

    Lowering the power or volume settings can reduce audibility without compromising the effectiveness of the device.

Combine with Other Pest Control Methods:

  • Enhance the efficacy of your pest control efforts by utilizing the ultrasonic pest repeller in conjunction with other methods such as traps, baits, or insecticides.

    This comprehensive approach can provide greater assurance while minimizing reliance solely on sound-based deterrence.

Seek Manufacturer Guidance:

  • If the audible ultrasonic sounds persist despite trying the aforementioned solutions, it is advisable to consult the manufacturer. They can offer additional troubleshooting tips or potentially provide a replacement if the device is found to be faulty.


While ultrasonic pest repellers are designed to operate beyond the range of human hearing, it is not uncommon for some individuals to perceive the emitted sounds.

Age, sensitivity, and individual variations in hearing capabilities can influence the audibility of these sounds.

By implementing expert solutions like repositioning the device, adjusting power or volume settings, combining with other pest control methods, and seeking manufacturer guidance if needed, you can effectively address the audibility issue while benefiting from the repelling capabilities of the device.

Remember, understanding the reasons behind this occurrence empowers you to take appropriate action and ensure a pest-free environment without the inconvenience of audible ultrasonic sounds.

Latest Comments

  1. How does an ultrasonic pest repeller operate?

  2. The device emits sound waves at a frequency typically ranging from 20 kHz to 65 kHz. These frequencies are supposed to interfere with the pests’ nervous systems or communication, causing them discomfort and deterring them from occupying the space where the repeller is active.

  3. Can the frequency of my ultrasonic pest repeller be adjusted?

  4. This depends on the model. Some ultrasonic pest repellers come with frequency settings that can be adjusted, while others have a fixed frequency. It’s important to read the product specifications before purchasing.

  5. What are the alternatives if ultrasonic pest repellers are too noisy?

  6. Alternatives include traditional traps, baits, and chemical repellents, as well as non-toxic and natural methods such as peppermint oil, diatomaceous earth, or having a cat. It’s also valuable to ensure your home is clean and free of food scraps that might attract pests.

  7. What should I do if my ultrasonic pest repeller is audible?

  8. You might want to check the device to see if it has adjustable settings. If the sound is bothersome or the device lacks adjustable features, consider replacing it with a different model or brand that operates entirely outside the range of human hearing.

  9. How can I test if my ultrasonic pest repeller is working?

  10. While you may not be able to hear the ultrasonic sound if it’s working correctly, observing a decrease in pest activity over time can be an indicator. Some devices also have LED lights or other indicators to show they are operational.

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