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  2. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    This is because an engine's cyclic nature makes analysis and noise cancellation easier to apply. Modern mobile phones use a multi-microphone design to cancel out ambient noise from the speech signal. Sound is captured from the microphone(s) furthest from the mouth (the noise signal(s)) and from the one closest to the mouth (the desired signal).

  3. Echo suppression and cancellation - Wikipedia

    en.wikipedia.org/wiki/Echo_suppression_and...

    Echo suppression and echo cancellation are methods used in telephony to improve voice quality by preventing echo from being created or removing it after it is already present. In addition to improving subjective audio quality, echo suppression increases the capacity achieved through silence suppression by preventing echo from traveling across a ...

  4. Telephone hybrid - Wikipedia

    en.wikipedia.org/wiki/Telephone_hybrid

    Some incorporate acoustic echo cancellation to allow setups with acoustic paths between loudspeakers carrying phone audio and microphones feeding the phone lines. In studio applications, a hybrid needs particularly good send-to-receive isolation. When too much of the host audio appears at the hybrid's output, there will be a number of defects.

  5. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Active noise cancellation makes it possible to listen to audio content without raising the volume excessively. In an aviation environment, noise-cancelling headphones increase the signal-to-noise ratio significantly more than passive noise attenuating headphones or no headphones, making hearing important information such as safety announcements ...

  6. PRIVATE WiFi Member Benefit FAQs - AOL Help

    help.aol.com/articles/private-wifi-member...

    PRIVATE WiFi is a virtual private network (VPN) software that protects your identity and sensitive information by encrypting everything you send and receive over public WiFi networks so that your online activity is invisible to threats.

  7. System Mechanic - AOL Help

    help.aol.com/products/system-mechanic

    Restore power, speed and stability with over 200 critical tests and 50 tools using the go-to solution for ultimate PC performance and trouble-free computing.

  8. Premium Tech Support with Assist by AOL | AOL Products

    www.aol.com/products/tech-support/assist

    Get friendly tech support online and over the phone with Assist by AOL. Virus removal, slow computers and more. Get affordable expert help today.

  9. Noise reduction - Wikipedia

    en.wikipedia.org/wiki/Noise_reduction

    the available computer power and time available: a digital camera must apply noise reduction in a fraction of a second using a tiny onboard CPU, while a desktop computer has much more power and time whether sacrificing some real detail is acceptable if it allows more noise to be removed (how aggressively to decide whether variations in the ...