HOW NOISE CANCELLATION WORKS

1 REFERENCE MICROPHONE /

Positioned on the outside of the earcup or bud, this mic analyses all frequencies of ambient sound and routes them to the circuitry inside the headphones.

2 NOISECANCELLING CIRCUITRY /

A summing amplifier in the earcup receives the reference mic info and calculates the frequencies opposite to (180° out of phase with) the outside noise.

3 SPEAKER /

Receiving data from the circuitry, the speaker emits the oppositephase frequency (alongside your music) to nullify the ambient noise. With the music off, only muffled noise hits your ears.

4 ERROR MICROPHONE /

Positioned near the ear canal, this constantly monitors signalto-noise ratio entering the ear and relays the info back to the circuitry for necessary adjustments.