What are Ultrasonic Repellents?
No one wants animals or insects to turn from cute
outsiders to unwanted guests. But with industrialization,
sometimes these animals have no where they can go and see your
home as a place that they can safely live and feed. While you
may feel for these animals, ideally you want to keep them away,
because they carry disease, tear up your garden, and can be
hostile to you and your family.
When someone wants to keep animals away from their
home, garden or backyard, they often turn to ultrasonic
How do Ultrasonic Repellents Work?
There are noises that are too high a pitch for human
ears, but can easily be heard by animals with which hearing
faint noises can be the difference between life and death.
These noises are referred to as “ultrasonic” and are
traditionally thought of as any noise over 20 kHz. The decibel
level of ultrasonic devices varies by manufacturer, but it is
traditionally around 100 kHz.
When an ultrasonic repellent is designed for a
specific animal, the decibels are traditionally set at a level
that is thought to be the most irritating to the animal. When
the device is meant to repel all animals, the decibel level is
likely to be slightly lower so that it can be heard by every
Much like high pitched noise can be irritating to
humans, so too is ultrasonic noise irritating to animals. Most
ultrasonic devices use motion detectors to scan for animal
activity. Once they sense movement, they sound their
imperceptible alarm and animals flee the noise.
2 Types of Ultrasonic Repellents
There are two unique types of ultrasonic repellents
(as well as a number of different subtypes). There are
ultrasonic devices made for:
Many of the insect repellents work by sending the
ultrasonic noise into walls and other areas that bugs like to
live. The animal repellents, however, often are larger and
placed outside your home in order to keep the animals
There are similar animal ultrasonic repellents that
are used indoors, such as those that you place in your attic to
keep bats away. But all of them generally work in a similar
manner, keeping animals at a predefined distance away from your
What Types of Animals Do Ultrasonic Repellents Keep
Almost all animals can hear noises that most humans
cannot hear. Thus ultrasonic repellents can be used to keep
away almost any type of animal that may live near your home.
The best part about ultrasonic repellents is
that they do not harm the animals, so they can be safely
used for any animal that you want to keep away from your
property. These ultrasonic devices are the most common
type of non-liquid animal repellent, and are one of the
only long lasting ways to deter animals as many of the
other methods available are unable to withstand time and