Repello quickly became a national news story. Over 40 news organisations - including SVT, TV4, Aftonbladet and Swedish Radio - reported on the unexpected discovery: a rat repeller that actually works.
Other products are criticised for not working. Repello is praised for working in the real world.
More advanced sound than the rat scares currently on the market
The sound patterns are designed to activate the rat's limbic system - the fear centre of the brain
The rat scarer that fights rats without killing them
A new approach to tackling the growing rat problem
Keeps pests away without poison
TV and radio adverts
Here we highlight selected features from SVT and TV4 where our solution and experts participate.
Researchers at Luleå University of Technology have developed a method that scares away rats with sound without killing them. The technology simulates acute threats through signals in the frequency range where rats are most sensitive - the same type of sound as their own warning noises from Tooth squeaks. The sound is patent pending, does not affect humans or domestic animals and activates the rats' subconscious flight reflex.
Rat problems are big in Swedish cities. Now researchers at Luleå University of Technology have developed the "Rat Scare" that fights rats without killing them - using tooth grinding. The sound mimics rats' own warning signals and triggers the limbic system, so that the animals' subconscious flight reflex is activated.
A new method from Luleå University of Technology could make rat-free places possible. Disturbing sounds are designed to scare rodents away. It involves creating frequencies that are irritating to rats. "For small animals we have to go high up in frequency," explains researcher Örjan Johansson. The method can also be developed to target insects, with the aim of limiting the ability of mosquitoes to fly and bite.
The problem of rats in Swedish cities is increasing as the rules on chemical pesticides are tightened. Professor Örjan Johansson at Luleå University of Technology has helped develop a method that scares remove rats using sound - without killing them.
Articles and testimonials
Here we collect a selection of articles, reports and news items where Repello and our innovations have been recognised.
Reportage
Article on how advanced sound technology is used to disrupt rat behaviour and reduce damage in homes and properties.
LTU and SLU have developed an audio transmitter that plays ultrasound based on the rat's own warning sounds - a method that triggers the escape reflex.
Technique
Designed sound signals simulate acute threats that trigger the rats' escape reflex - a non-toxic method that can reduce the increasing rat problems in Swedish cities.
Sweden
Scientists have developed sound signals that trick rats' brains into perceive acute threats and thus flee the scene - without poison or traps unnecessary suffering.
Novelty
Scientists have developed unpleasant sound signals that trigger the rats' escape behaviour and reduce problems in Sweden's cities.
Research and development
Researchers at Luleå University of Technology have developed sound signals which triggers the rats' subconscious flight reflex so that they leave the site without being harmed.
How to recognise a fake scare - the professor reveals the warning signs
Ultrasonic Rat repellers have been on the market for over forty years. But despite hundreds of models and thousands of promises, only one product - Repello - has been scientifically tested and show...
Råttskrämma bäst i test 2025: Repello tar hem dubbla förstaplatser
I två helt oberoende tester under 2025 — genomförda av Villanytt och Bäst i Test Guiden — utsågs den svenskutvecklade råttskrämmaren Repello till årets vinnare. Det gör Repello till den enda råttsk...
Repello launches campaign with Pernilla Wahlgren and Christina Schollin
Pernilla Wahlgren will be the face of the Swedish-developed innovation Repello, which is based on research from Luleå University of Technology (LTU) and the Swedish University of Agricultural Scien...
