Active noise cancellation (ANC) is a form of audio technology commonly used in headset manufacture today.
Its purpose is to minimise background noise interference when people use telephone headsets.
ANC involves an external microphone picking up external noise, an internal microphone picking up the internal sound within the earphones.
ANC microchips then connect to the microphone outputs and using computerised audio engineering, isolate and ‘knock out’ the environmental noise pollution.
The microchips perform this by a process of audio signal comparison from the 2 microphones outputs.
In comparison, any additional sound isolated from the external mic feed will be deemed as noise pollution by the ANC chip and removed from the signal before it is passed into the earphones for your hearing.
The end result?
An audio signal that is clear of all environmental noise.