The powerful sound waves generated by the transducers are within the hearing range of many rodents and cause them pain and discomfort. Sometimes the rodents will leave the area being protected immediately.
The area where the machine is installed should have at least three surfaces i.e. ceiling, side walls and floor to have maximum bouncing/reflection of sound waves. Partitions reduce the effective area of the unit. The machine should be directed towards any hard surface for maximum bouncing effect. The reflections of sound waves vary from surface.