How Does Microphone Noise Cancelling Technology Work?

It’s just like speaker-based noise cancellation but in reverse. Rather than two opposing signals at different amplitudes being outputted by opposing speakers. Two opposing microphones convert sound into opposing AC signals with two sound levels. The combining of these two opposing AC signals and their separate sound levels is microphone-based noise cancellation and exactly what the Digital Signal Processor of your Digital device needs to operate at its peak.