👉 The term "eigenfrequency" is a mathematical concept used in physics and engineering, particularly in the study of time-invariant systems, to describe the frequency at which a system's response to an input signal changes. It relates to the frequency at which a system's output is most closely related to its input. In simple terms, it refers to the fundamental frequency of a wave or oscillation. The eigenfrequency represents the natural frequency of a system that produces the desired output. For instance, when
