Answer to Question #288239 in Civil and Environmental Engineering for Khushi

Question

Why do you observe ripples in the synthesis of the periodic train of square pulse?

Answer 1

• As we add sine waves of increasingly higher frequency, the approximation gets better and better.
• The addition of higher frequencies better approximates the rapid changes, or details, in the original function.
• Because the waveform lacks symmetry, both even and odd harmonics are needed to approximate the function causing the ripples.