Gentner XAP 800, Руководство по обслуживанию

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Acoustic echo is a significant challenge to overcome in virtually any
teleconferencing environment. The effects of acoustic echo can destroy a
teleconference because it impairs participants’ abilities to understand and
communicate.
Acoustic echo is created when microphones pick up audio from a
loudspeaker and return it to the originating teleconference site. This echo
will cause a conference participant to stop speaking while trying to listen
to the echo.
One way to remove echo from your teleconference is to use an acoustic
echo canceller. An acoustic echo canceller samples audio coming in from
the remote site and prevents this audio from being sent back to the
originating site. To be most effective, each site should utilize an echo
canceller.
There are several factors that contribute to poor echo cancellation. These
include:
Poor room acoustics
High reverberation
High noise
Rapidly changing acoustical environment
Wireless or other moving microphones
Poor microphone/speaker placement
Automatic mic mixers not properly configured to work with an echo can-
celler
Other audio devices such as audio processors and user gain controls
that change the acoustic gain to which the echo canceller must adapt.
Echo and Noise
Cancellation
Echo Cancellation
ECHO AND NOISE CANCELL ATION • ECHO CANCELL ATION
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