If you are wondering what exactly these noise cancelling headphones that everyone is on about, Bona Fide Reviews can answer your questions.  First up would be the difference between reduction and cancelling, and from there they move onto the applications you can use them in.

“Noise-cancelling headphones use tiny microphones that identify the noise or sounds outside the headphones and then work to cancel out the sounds. Noise-reduction headphones (also known as noise-isolation headphones) reduce sound by being a barrier through which sounds cannot pass. What does all this mean? And how do these two differ?”

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