The seismic system creates a disturbance impulse that propagates from the device to the entire structure, up to a radius of 20m in optimal conditions, through the iron network of the building or simply through a solid structure. The system, in order not to be mistaken for a classic static vibration of the environment like an industrial machine present, varies from 5 to 7 million combinations of vibrations, reducing the possibility of perceiving the same vibration twice within a year to almost 0. . The beat frequency best reproduces a seismic event or a dangerous situation due to the instability of the structure. With this method it is possible to reach all points of the structure, even those that cannot be reached by poisons or ultrasounds, which are strongly limited.