Active noise cancellation (ANC) headphones utilize onboard computers and algorithms to generate "anti-noise," which physically cancels out ambient sound waves before they reach the eardrum. This technology has become widespread, moving from a niche product to a common feature in consumer audio devices. Passive noise cancellation, on the other hand, relies on physical barriers, such as earcups or earplugs, to block external noise. Most headphones and earbuds inherently provide passive noise cancellation by covering the ear or filling the ear canal, and the effectiveness of ANC can be influenced by the quality of this passive seal. AI
RANK_REASON The article explains a technology concept rather than reporting on a new development or event.
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