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2. Noise-canceling microphone - Wikipedia

   en.wikipedia.org/wiki/Noise-canceling_microphone

   The internal electronic circuitry of an active noise-canceling mic attempts to subtract noise signal from the primary microphone. The circuit may employ passive or active noise canceling techniques to filter out the noise, producing an output signal that has a lower noise floor and a higher signal-to-noise ratio.

3. The best deals to shop during Walmart's weekly sale: Save on ...

   www.aol.com/lifestyle/the-best-deals-to-shop...

   Carote Kitchen Knife Set, 12-Piece. $18 $73. Save $55 with coupon. We love the neutral colors of this eye-catching knife set, which includes an 8-inch chef's knife, an 8-inch bread knife, an 8 ...

4. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Active noise control ( ANC ), also known as noise cancellation ( NC ), or active noise reduction ( ANR ), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in ...

5. Audio headset - Wikipedia

   en.wikipedia.org/wiki/Audio_headset

   Headsets are available in single-earpiece and double-earpiece designs. Double-earpiece headsets may support stereo sound or use the same monaural audio channel for both ears. Single-earpiece headsets free up one ear, allowing better awareness of surroundings. Telephone headsets are monaural, even for double-earpiece designs, because telephone ...

6. 20+ Amazing Walmart deals that are still available - AOL

   www.aol.com/lifestyle/walmart-deals-prime-day...

   Walmart is offering a full-year membership for just $49 (that's half the normal price)! Walmart+ members get access to more sales, but the deals we're seeing right now are already some of the best ...

7. What 'secret' loudspeaker codes mean at department stores - AOL

   www.aol.com/news/2010-10-13-what-secret...

   This "code" is one of many innocuous sounding secret codes that stores use to alert employees to problems without distracting you from shopping. We tracked down some current and former retail ...

8. Adaptive feedback cancellation - Wikipedia

   en.wikipedia.org/wiki/Adaptive_feedback_cancellation

   Adaptive feedback cancellation. Adaptive feedback cancellation is a common method of cancelling audio feedback in a variety of electro-acoustic systems such as digital hearing aids. The time varying acoustic feedback leakage paths can only be eliminated with adaptive feedback cancellation. When an electro-acoustic system with an adaptive ...

9. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Noise -cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones which suppress unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing . Noise cancellation makes it possible to listen to audio ...