Ultrasound is no rocket science. Ultrasound generators have been around since the time of discovery of piezoelectricity by Jacques and Pierre Currie in 1877.
The discovery of piezoelectricity (from the Greek word meaning “to press”) by the Curie brothers was an important scientific discovery. Pierre and Jacque found that when pressure is applied to certain certain nonconducting crystals, such as quartz, it polarizes them resulting in an electric field which is detectable as a voltage. When subjecting piezoelectric crystals to an externally applied voltage, inverse piezoelectricity, the crystals change shape by a minute amount. When the polarity of the voltage is alternated, the crystal rapidly expands and contracts producing a vibration. This deformation, although only nanometres, has important practical applications such as the production and detection of sound.
Paul Langevin, a student of Pierre Curie's, found that inverse piezoelectricity causes piezoelectric quartz in alternating fields to emit high-frequency sound waves. This led to the use quartz in a variety of applications including the first practical transducer (A transducer is an electronic device that converts energy from one form to another) for ultrasonic pulse-echo detection which were used to detect submarines and explore the ocean's floor.
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.
GIZMOCAT 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 GIZMOCAT causes will not allow them to relax. Rats chew things to 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 GIZMOCAT.
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