(And it has nothing to do with sound quality)

When the What Hi-Fi? team receives a shiny new set of wireless headphones for review, if noise-cancelling isn’t on the feature list the product may as well go home and come back only when it has tried harder – unless it has atoned for this glaring omission with supreme sonic capabilities or an alternative and striking USP. 

Just as wireless headphones have replaced wired headphones for so many of us in recent years, so noise-cancelling has become an essential feature on the checklist.
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