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2. 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 ...

3. 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 ...

4. Best Noise-Cancelling Headphones: Here’s Where To Get ... - AOL

   www.aol.com/lifestyle/best-noise-cancelling...

   Soundcore Anker Life Q20 Hybrid Active Noise Cancelling Headphones, Wireless Over Ear Bluetooth Headphones, 40H Playtime, Hi-Res Audio, Deep Bass, Memory Foam Ear Cups, for Travel, Home Office ...

5. Best noise-canceling headphones, according to Consumer ... - AOL

   www.aol.com/news/best-noise-canceling-headphones...

   Sony WF-1000XM4 $278.00 at Walmart. Sony WF-1000XM4 $279.99 at Best Buy. Sony WF-1000XM4 $278.00 at Abt. Over-Ear, Bluetooth, and Budget-Friendly Anker SoundCore Life Q20

6. 8 of the best noise-canceling headphones for blocking out the ...

   www.aol.com/news/9-best-noise-cancelling...

   BEST NOISE-CANCELING HEADPHONES DEALS THIS WEEK: * Cowin E7 Active Noise Cancelling Headphones -- $49.99 (save $10) * Bose QuietComfort 25 -- $147.18 (save $197.82) * Skullcandy Venue Active Noise ...

7. Hearing protection device - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_device

   Sound levels of some daily activities. A hearing protection device, also known as a HPD, is an ear protection device worn in or over the ears while exposed to hazardous noise and provide hearing protection to help prevent noise-induced hearing loss. HPDs reduce the level of the noise entering the ear. HPDs can also protect against other effects ...