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2. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   In the 1950s Lawrence J. Fogel patented systems to cancel the noise in helicopter and airplane cockpits. In 1957 Willard Meeker developed a working model of active noise control applied to a circumaural earmuff. This headset had an active attenuation bandwidth of approximately 50–500 Hz, with a maximum attenuation of approximately 20 dB. [3]

3. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Simplified graphical depiction of active noise reduction. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control or ANC.A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds.

4. Huawei FreeBuds - Wikipedia

   en.wikipedia.org/wiki/Huawei_FreeBuds

   Huawei FreeBuds are wireless Bluetooth and NearLink earbuds. They were first announced and released on March 27, 2018, alongside the Huawei P20 series.In addition to playing audio, the Huawei FreeBuds contain built-in microphones for noise cancellation, accelerometers, and optical sensors to detect wear status and gestures (e.g., double-tap to pause audio).

5. Review: For $150, the New JBL Live Free 2 Earbuds Are ... - AOL

   www.aol.com/review-150-jbl-live-free-200013416.html

   Buy: JBL Live Free 2 Earbuds $149.95 . JBL Live Free 2 Offer Easy Pairing. Much like the setup for JBL’s Live Pro 2 earbuds, the setup here for the Free 2 is pretty fast. Upon opening the ...

6. Download, install, or uninstall AOL Desktop Gold - AOL Help

   help.aol.com/articles/aol-desktop-downloading...

   Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.

7. List of Bose headphones - Wikipedia

   en.wikipedia.org/wiki/List_of_Bose_headphones

   The "A20 Aviation Headset" was released in 2010 as the successor to the "Aviation Headset X" (aka A10). [26] [27] It has a claimed battery life of 45 hours (using two AA batteries) or can be powered by the airplane's electrical system. There are two versions, one with Bluetooth and one without.