Headphones and earbuds used to be pretty simple. They had just one task—playing music. But a relatively new feature called ANC or “active noise cancelation” has turned everything on its head. It’s now impossible to shop for headphones without running into this feature, which claims to cut background noise in any environment. And let me tell you, ANC is awesome.
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Source : What Is ANC, and How Does It Improve My Headphones?
