I'd argue it depends on the methodology by which they're implementing the techno... | Hacker News

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		iaw on Dec 9, 2016 \| parent \| context \| favorite \| on: Bose Hearphones I'd argue it depends on the methodology by which they're implementing the technology. They could be using the directionality to amplify the "target" signal and identify the signals that the wearer desires to mute and then run a fast algorithm to reduce that sound.

KaiserPro on Dec 9, 2016 [–]

Without a probe, they are almost certainly altering the phase of the each channel to remove background noise

You can do this with at matched pair of mics and a desk that can flip the phase of channels.

https://en.wikipedia.org/wiki/Out_Of_Phase_Stereo

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