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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. Applications. Call center headsets

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. Audio headset - Wikipedia

   en.wikipedia.org/wiki/Audio_headset

   Voicetube designs are also called internal microphone design, and have the microphone housed near the earpiece, with a tube carrying sound to the microphone. Most external microphone designs are of either omnidirectional or noise-canceling type. Noise-canceling microphone headsets use a bi-directional microphone as elements. A bi-directional ...

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   www.aol.com/lifestyle/shop-walmarts-secret-sale...

   Samsung 65" Class S90C Oled 4K Smart TV. $1,597 $3,299 Save $1,702. We couldn't believe it either at first, but it's true — Walmart has slashed $1,700 off this Samsung 65-inch smart TV. Prepare ...

6. Walmart's answer to Amazon Prime Day is coming: Here's when ...

   www.aol.com/lifestyle/walmarts-largest-deals...

   Walmart just announced Walmart Deals, or more casually known as Walmart's anti-Prime Day sale, will kick off on Monday, July 8 at 5pm ET and run through Thursday, July 11 at 11:59pm PT. There will ...

7. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Protection of a "1-dimension zone" is easier and requires only one or two microphones and speakers to be effective. Several commercial applications have been successful: noise-cancelling headphones, active mufflers, anti-snoring devices, vocal or center channel extraction for karaoke machines, and the control of noise in air conditioning ducts ...