Earbuds implement noise isolation in their design, as they are supposed to fit perfectly inside the ear canal whereas the outer ear sitting earphones are not, because they allow air to enter. The active noise cancellation feature is also associated with higher-end earbuds, while low-end headphones don't have the ability to cancel out noise. https://apnews.com/press-release/kisspr/technology-business-jogging-c4b1d61bae13219bd07ad50e094967e22
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