Headphones with active noise cancellation have built-in microphones that detect the pitch and amplitude of external noise. Then, based on this data, the control electronics adaptively generate the sound in phase opposition so that the sound waves cancel each other out in the immediate vicinity of the ear. The housing of the headphones must also block external noise so that the anti-noise has enough time to reach the ear at the same time. This is why noise-canceling headphones are usually designed as over-ear or on-ear models.
Geluid verplaatst zich door de lucht met 340 meter per seconde. De processors in de hoofdtelefoons moeten daarom de nodige berekeningen in fracties van een seconde uitvoeren. Daarom bouwt Sennheiser krachtige processors en precieze geluidstransducers in. Zo kunt u genieten van eersteklas Sennheiser-geluid zonder omgevingsgeluid.