How noise cancellation technology works (without the annoying math)

Ever wondered how you’re wearing a modern headphone or EarPod, and suddenly the noise/sounds around you reduce drastically ?Its not magic, it’s a cool technology called noise cancellation and I’ll explain how it works; So there are two ways this can be achieved; Passive noise cancellation Active Noise cancellation (ANC) Passive noise cancellation is simply the use of materials to partially block sound waves, as simple as that. However this method is not very effective, there is a more effective