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.
聲音在空氣中的傳播速度為每秒340公尺。因此耳機內的處理器必須在瞬間完成必要運算。正因如此,森海塞爾採用強大處理器與精密聲學轉換器,讓您能享受頂級森海塞爾音質,同時隔絕環境噪音干擾。