What is signal impulse?

A signal impulse is a sudden, brief change in a signal's amplitude, often used in the context of electrical signals or communications. It typically represents a rapid transfer of information or energy, such as a spike in voltage or current. In signal processing, an impulse can be modeled mathematically as a Dirac delta function, which is essential for analyzing systems' responses to sudden changes. Impulses are crucial in various applications, including telecommunications, audio processing, and control systems.