Ultrasonic Cat Repeller & Deterrent

close up image of a cat

An ultrasonic cat repeller | deterrent will keep felines out of your garden. The Ultrasonic Cat repeller generates a high pitch sound that humans cannot hear. A cat finds the sound very alarming and will do a "U" turn to quickly exit the garden. Some ultrasonic repellers have adjustable frequencies which can be set to the appropriate hearing range for the specific animal you want to deter (Fox, Deer, Bager, dog etc). The ultrasonic sound produced is beyond that of human hearing, therefore we can't hear it but animals can. For more information on animal hearing ranges, click here.

An ultrasonic cat repeller creates an uncomfortable environment that a cat wants to get away from. Most battery powered cat repellers have an PIR motion detector, that when a cat moves in front of it, activates the ultrasonic noise that a cat hates. It's not painful or cruel, just annoying to a cat.

Things you can do to keep cats away.

To their owners, cats are wonderful companions. However, for non pet owners these animals are often far from wonderful and can become the most hated sight in a garden as they dig up flower and vegetable beds to use as a toilet.

Many of us like to feed birds in our gardens, but this often attracts the unwanted attention of a cat who will see your bird table or bird feeder as a fast food take-away. A cats motivation to catch birds can sometimes be far greater than the deterrent effect of any ultrasonic repeller. To help break the cycle of a cat repeatedly entering your garden, it is best to stop feeding the birds for a couple of weeks when you first install the repeller. By doing this, it will greatly increase the chances of the ultrasonic repeller having a lasting effect on the cat. Once the cat thinks that there are no more birds in your garden, the ultrasonic noise will then chase the it away.


There are a few points to mention about positioning the ultrasonic cat repeller. They don't work through bushes, shrubs, hedges or anything else that is an obstacle. The unit needs a clear line-of-sight for both the PIR motion sensor to be able to detect movement and the ultrasonic tone to be heard by the cat.

diagram showing the range of small and large ultrasonic cat repellers

100ft range or 30ft range cat repeller?

FAQ's.

Q. Does an ultrasonic cat repeller affect birds? A. No. 
Q. Will it affect my dog? A. No
Q. Will it affect my pet rabbit? A. No

For more information on keeping cats out of your garden:   ​​​​​​

link to blog post about keeping cats out of your garden

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