For years, military scientists have experimented with sonic weapons - technologies that can cause people to lose their bearings, become nauseous or simply flee the scene. Now Swedish researchers are showing that the same principles can be used against one of our most stubborn enemies: rats and mice.
After years of research in collaboration with Luleå University of Technology (LTU), scientists have developed Repello, a patented Swedish invention that directly targets the reptilian brain of rodents. The result: rats flee in panic - without coming back.
How the technology works - sounds the brain can't ignore
Unlike the simple ultrasonic devices sold in shops - often for a few hundred dollars - Repello relies on complex sound sequences, using patterns that vary in both frequency and intensity instead of a constant tone.
It's the same principle that makes military 'sound cannons' so effective: the brain cannot predict or get used to the signals.
- It's not about volume, but about simulating an acute threat. The rat perceives it as life-threatening - and flees immediately," says Örjan Johansson, professor of technical acoustics at LTU.
👉 Read more about Repello and order here
Proven effectiveness - unlike other solutions
Tests at SLU show that mice and rats not only leave the room when Repello is activated - they also avoid returning. This distinguishes the technology from traditional ultrasonic devices, which often lose effectiveness as the rodents learn to ignore the sound.
TV4 Nyheterna and SVT have already reported on the research progress, and interest is growing rapidly internationally.
Now, for the first time, the technology is available to Swedish households. Each Repello unit covers up to40 m², andcan be used in kitchens, basements, attics or garages.
Advantages of Repello:
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Patented Swedish technology developed at LTU and SLU
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Tested on multiple species with proven efficacy
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No poisons, no traps - just sound
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First technology that rodents can't get used to
