Transient signals are temporary changes in a system's output that occur over a short period. These signals can arise from various sources, such as sudden changes in input, disturbances, or the activation of a device. They are characterized by their brief duration and can be observed in many fields, including electronics, communication systems, and control engineering. In signal processing, transient signals are important for analyzing system behavior and performance. They can help engineers understand how a system responds to sudden changes and can be used to design filters or control strategies that improve stability and response time.