Noise cancellation in headsets: What is it, and how exactly does it work?

You have heard about Active Noise Cancellation (ANC) in headsets many times. But what is it? How does it work, and how can it help you work? Jabra has a long history of engineering such sound solutions and can explain.

The first thing to note is that there are two types of cancellation – passive and active – and both are important features of the Jabra Evolve 75 and Evolve 75e. 


Passive Noise Cancellation (PNC)

This refers to noise cancellation achieved by the headset’s physical features, such as design, a superior fit, and the materials used. It’s really just a fancy term to describe the effect you get from simply wearing the headset – covering your ears helps to block out noise. Passive Noise Cancellation is good at filtering out irregular, high frequency sounds, such as a nearby colleague in a busy open office

Active Noise Cancellation (ANC)

ANC is all about generating ‘anti-noise’ to cancel ambient noise. ANC detects and analyzes the sound pattern of incoming noise, and then generates a mirror “anti-noise” signal to cancel it out. The end result – you’ll clearly notice a drastically reduced level of noise. This type of noise cancellation works best for steady, low frequency sounds, like ceiling fans, engine noise, or numerous colleagues in your office whose voices form constant noise and are, thus, are a constant disturbance.

Noise Cancellation in the microphone

In addition to the above-mentioned PNC and ANC capabilities, all Jabra headsets have noise cancelling microphone that reduces ambient noise so your call partner can hear you well.


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