Ultrasound is no rocket science. Ultrasound generators have been around since the time of discovery of piezoelectricity by Jacques and Pierre Currie in 1877.
Ultrasound generators exploit the piezoelectricity effect (electrical to mechanical energy conversion and vice-versa) of certain crystals to produce vibrations at ultrasonic frequencies.
Rat and rodents like bats and dolphins can hear and create ultrasound. They use ultrasound for echo location, long range communication, mating calls, aggression and distress signalling.
Most off-the-shelf ultrasound rat repellents are simple ultrasound generators which create ultrasound centred around a particular frequency. They act more like ultrasound jammers in a particular ultrasound frequency, which does not really cause much distress to rodents. Over time they get used to the ultrasound generated and come back with a vengeance to cause more damage. This is why ultrasound rat repellents have a bad reputation and misconceptions.
The real science and research are identifying frequency patterns that have an effect.
CARCAT uses a broadband piezoelectric crystal for ultrasound generation. Different algorithms are employed in the firmware which create frequency patterns to confuse and disorient rats. The patterns mimic their distress calls, mating calls, alpha aggression, etc. The patterns are mixed and matched in such a way that rats get confused whether to be scared or sexually aroused. They also get disoriented as they cannot echo-locate properly.
Different individual rodents react differently in such an atmosphere. Most rats will move away. Some aggressive alpha ones will try resist. But the continuous distress that CARCAT causes will not allow them to relax. Rats chew on things when they are relaxed. They need to wear out their continuously growing front incisors or their mouths won’t shut.
There is a drawback too, a very small percentage rats will start biting things as they are confused and agitated and cannot find their way out. But that happening is rare and damage done won’t be as bad as without CARCAT.
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