These devices come in all kinds of shapes, sizes, and designs. The logic behind their function seems like it makes sense, but these devices simply do not work. Rodents and Insects are masters of adapting to their environment. Their capabilities to adapt far exceed that of people in many ways. In the same way a person can tolerate and get used to living next to a noisy freeway or construction site, Rodents and Insects can tolerate and adapt to living in and around far worse conditions.