Have you ever heard a low hum from a speaker? That’s unwanted AC noise. RLC filters are the noise-canceling headphones of the power world.

If you’ve ever taken an electronics course, the acronym (Resistor, Inductor, Capacitor) probably brings back memories of complex differential equations, phasor diagrams, and the dreaded “underdamped vs. overdamped” question. It’s easy to assume RLC circuits are just classroom theory.

If you’re an engineering student, RLC circuits feel like math homework. But in reality, they are .