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Roaches have plagued home owners and building managers since buildings came into existence. 

Once roaches invade a structure, it’s very difficult to remove them from the space.

You probably won’t realize you have a roach problem until the issue escalates. Also, roaches cause a variety of diseases like dysentery, cholera and diarrhea.

That’s why it is so important to eradicate your home or business of roaches as soon as you find them.

It’s easy to see why ultrasonic pest repellers seem so attractive to use against roach infestations.

But, do ultrasonic pest repellers work on roaches?

We’ll explore that consideration throughout this article.

But first, let’s learn how to determine if you have a roach infestation.

How to know if you have roaches

The first step of your pest removal journey is as simple as determining if you do, in fact, have cockroaches.

Here are a few easy ways you can quickly learn if you are dealing with a cockroach infestation:

  • Do you see cockroach droppings?

Cockroaches often leave behind identifiable droppings that resemble pepper flakes.

You will most likely find these droppings in kitchen areas such as cabinets or around the border of electrical appliances.

  • Do you see cockroach egg sacs?

Cockroaches often lay their eggs in small, shadowed locations in your home. 

Some examples of prime nesting locations include the space between the kitchen counter and your oven, in and around rarely used furniture, in crevices underneath loose boards and drawers.

If you find either of these cockroach identifiers, there’s a good chance that you’re dealing with a cockroach invasion.

Mechanics of ultrasonic pest repellers

Ultrasonic pest repellers emit very high frequency sound waves above the range of human hearing. 

This noise is supposed to be repulsive to roaches, causing them to vacate the area nearby the device.

When roaches hear these ultrasonic frequencies, they are thought to be confused, annoyed, and disoriented.

Ultrasonic pest repellers are extremely easy to use, and they fit into your daily life.

All you have to do is locate the area where roaches are most prominent and then plug the pest repeller into a nearby outlet!

Simply wait, and let the pest repeller do the rest. If everything works as expected, you’ll soon be free of roaches.

Doesn’t that sound like an easy way to get rid of pests?

Do ultrasonic pest repellers work on roaches?

At least, this is what ultrasonic pest repeller manufacturers would like you to believe.

However, there is little evidence for these claims.

Researchers are overwhelmingly ambivalent about the efficacy of ultrasonic pest repellers.

In some instances, ultrasonic sound devices are a cure-all for pest issues.

However, they are ineffective by most accounts.

Kansas State University conducted a study with highly mixed results. Scientists found that ultrasonic pest repellers were moderately useful against creatures such as crickets.

However, they had very little efficacy against cockroaches and were entirely useless against spiders.

So, the effectiveness of ultrasonic pest repellers is highly situational.

While some people enjoy success with these tools, most people agree that they are largely ineffective.

Reasons why ultrasonic pest repellent devices are ineffective

As we mentioned, some people do enjoy great success with ultrasonic pest repellers!

However, if you purchase a few of these devices and find your situation without noticeable improvement after a few weeks of use, here are some of the reasons why ultrasonic pest repellers may not work for you.

  • Pests become immune to the ultrasonic waves over time.

At first, pests might be highly perturbed by the new noise in their environment.

However, if the ultrasonic waves do not actually harm them, the device will lose effect over time.

Have you ever been in the presence of a slightly annoying sound?

Generally, the longer you listen to the noise, the less it bothers you.

Ultrasonic pest repellers can have the same effect on cockroaches.

Cockroaches may be initially annoyed but grow accustomed to their new environment.

  • Pests may not hear your ultrasonic pest repeller.

Ultrasonic pest repellers come in a variety of wave ranges. 

However, your pests’ hearing range may be confined to a relatively small set of wavelengths.

If your pest repeller is tuned to a wavelength outside of the pests’ audible range, cockroaches will not be bothered by the pest repeller any more than you are.

If you choose to use an ultrasonic pest repeller, make sure you select a unit that emits ultrasonic wavelengths within the hearing range of your pest.

  • The ultrasonic waves are blocked before they affect pests.

Cockroaches like to live in very secluded areas. You’ll most often find them burrowed deep in your home.

That means that the ultrasonic waves must penetrate many layers of furniture, construction and hardware before they come into contact with the cockroaches!

Isn’t it reasonable to think that ultrasonic waves may not be able to penetrate through all of those layers?

Depending on the location of your pest invasion and the barriers between pests and your repeller, ultrasonic waves may fizzle out long before they reach your pests.

If you have a situation involving roaches, it’s important to consult a pest control industry expert to determine the safest and most effective solution to address your problem.

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