Apple announces AirPods Pro with noise cancellation

Hanno Labuschagne

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Sep 2, 2019
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Apple announces AirPods Pro with noise cancellation

Apple has unveiled the latest addition to its selection of earbuds - the AirPods Pro.

The new devices feature active noise cancellation, which uses a combination of built-in microphones and software to provide users with an immersive sound experience.

Each AirPod sports two microphones. An outward-facing microphone listens to background noise and counters this with an equivalent anti-noise, while another inward-facing microphone listens to the inside of the ear for any further noise disturbance.
 

konfab

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Apple says the noise cancellation will adapt the sound signal 200 times per second.
In engineering terms:
"Our noise cancellation tech only works on sound sources with a frequency band below 200Hz"

One has to give Apple credit as the world's best marketing company though, as adaptive noise control have always been unable to target higher frequencies:
Active noise canceling is best suited for low frequencies. For higher frequencies, the spacing requirements for free space and zone of silence techniques become prohibitive. In acoustic cavity and duct based systems, the number of nodes grows rapidly with increasing frequency, which quickly makes active noise control techniques unmanageable. Passive treatments become more effective at higher frequencies and often provide an adequate solution without the need for active control
https://en.wikipedia.org/wiki/Active_noise_control
 
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