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  2. Echo suppression and cancellation - Wikipedia

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

    The performance of an echo canceller is measured in echo return loss enhancement (ERLE), [3] [9] which is the amount of additional signal loss applied by the echo canceller. Most echo cancellers are able to apply 18 to 35 dB ERLE. The total signal loss of the echo (ACOM) is the sum of the ERL and ERLE. [9] [10]

  3. Telephone hybrid - Wikipedia

    en.wikipedia.org/wiki/Telephone_hybrid

    However, any uncancelled hybrid leakage will cause echo when the associated transmission path has delay, so the effect on the system is reduction of echo.) Hybrids and cancellers are sometimes combined with echo suppressors. These work on the assumption that usually only one of the two parties to a conversation is speaking at a given time.

  4. Round-trip delay - Wikipedia

    en.wikipedia.org/wiki/Round-trip_delay

    RTT is a measure of the amount of time taken for an entire message to be sent to a destination and for a reply to be sent back to the sender. The time to send the message to the destination in its entirety is known as the network latency, and thus RTT is twice the latency in the network plus a processing delay at the destination. The other ...

  5. Network performance - Wikipedia

    en.wikipedia.org/wiki/Network_performance

    The speed of light imposes a minimum propagation time on all electromagnetic signals. It is not possible to reduce the latency below = / where s is the distance and c m is the speed of light in the medium (roughly 200,000 km/s for most fiber or electrical media, depending on their velocity factor).

  6. ‘Most powerful woman on Wall Street’ Sallie Krawcheck steps ...

    www.aol.com/finance/most-powerful-woman-wall...

    Krawcheck shrugged off the negativity joking about “living rent-free” in people’s brains. “Embrace the haters,” she said. “Pressure’s a privilege.”

  7. Adaptive feedback cancellation - Wikipedia

    en.wikipedia.org/wiki/Adaptive_feedback_cancellation

    Adaptive feedback cancellation originated during the evolution of the hearing aid. The hearing aid became digital, and as such feedback cancellation was needed. In 1980 a directional microphone was introduced in the digital hearing aid, and adaptive feedback cancellation was created to block external noise that the microphone picked up. Today ...

  8. Cancel or reactivate your AOL account

    help.aol.com/articles/account-management-cancel...

    Things to know when you change your AOL account to the free AOL plan: If you cancel your billing and change to the free AOL plan in the middle of your billing cycle, you'll continue to have access to the service until the end of your current billing cycle. If you have any active premium subscriptions, those will continue to be billed separately.

  9. Woman’s Seizure ‘Saved My Life’ After Learning Her ‘Subtle ...

    www.aol.com/woman-seizure-saved-life-learning...

    The condition, which occurs due to a portion of the skull being misshapen or too small, can cause symptoms like headaches, dizziness and vertigo, weak muscles, difficulty with balance or ...