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  2. Tellabs - Wikipedia

    en.wikipedia.org/wiki/Tellabs

    In September 1981, Tellabs introduced the industry's first echo canceller, an advance over the original echo suppressors that synthesized an echo and electronically subtracted it. By 1990, Tellabs had grown to 2,000 employees at 25 locations globally and sales of $211 million.

  3. 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 ...

  4. 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]

  5. Echo canceller - Wikipedia

    en.wikipedia.org/?title=Echo_canceller&redirect=no

    Language links are at the top of the page across from the title.

  6. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. Vera Farmiga and Patrick Wilson are getting sentimental as filming wraps on "The Conjuring: Last Rites." Here's to one of the realest fakest marriages out there.

  8. Echo cancellation - Wikipedia

    en.wikipedia.org/?title=Echo_cancellation&...

    This page was last edited on 4 April 2014, at 16:49 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...

  9. One Knock. Two Men. One Bullet. - The Huffington Post

    projects.huffingtonpost.com/bryan-yeshion...

    A witness first saw the gun poking through a crack between the apartment door and the frame. There had been a knock and an eerie silence, then an attempt by two men to force the door open.