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Noise Canceling

By Sweetwater on September 19, 2016

More accurately called “Active Noise Canceling,” this is a method for reducing noise by adding a sound to the desired signal specifically designed to cancel the unwanted noise. Usually this is done by capturing the unwanted noise but with its phase or polarity inverted. By a process called “destructive interference,” the captured noise and the original noise are combined and the out-of-polarity signals cancel each other out, eliminating the unwanted noise. Noise canceling has many applications but is most popular today in headphones designed to block out external sound.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

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Noise Canceling

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Noise Canceling

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