Specifications

AEC opens the Acoustic Echo Canceller window. To
enable the acoustic echo canceller, click Enabled,
then select the PA Adapt/AEC Reference output you
wish to use. If you select an Expansion Bus reference,
the Define PA Adapt/AEC Expansion Bus Ref window
opens so you can identify which Expansion Bus and
output you wish to use as the AEC’s reference.
The Non-linear Processing (NLP) feature increases the
power of echo cancellation for difficult acoustical
environments. NLP features four settings: Soft (6dB),
Medium (12dB), Aggressive (18dB), and Off. Use NLP
with care; corresponding trade-offs can include
suppression and half-duplex operation. Default is Soft.
The Echo Return Loss (ERL) meter shows the coupling
between the reference signal and the input to the echo
canceller—the ratio of the two levels. It is an average
meter that updates only when a signal is present.
The Echo Return Loss Enhancement (ERLE) meter
shows the loss through the echo cancellation and non-
linear processing chain—the ration of the two levels. It
is an average meter that updates only when a signal is
present.
The Total Echo Reduction meter shows the total ERL
and ERLE reduction, in decibels. It is an average meter
that updates only when a signal is present.
The acoustic echo cancellation default is On.
NC opens the Noise Canceller window. The noise
canceller reduces ambient noise in the signal with no
noticeable degradation in signal quality.
To use noise cancellation, click Enable Noise
Canceller, then adjust the Cancellation Depth to the
setting which provides the best combination of low
noise and maximum speech clarity. The attenuation
depth can be set in 1dB increments from 6dB to 15dB.
Default is 6dB.
The noise canceller default is Off.
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
G-WARE SOFTWARE • NOISE CANCELLER
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Noise Canceller Window
Acoustic Echo Canceller Window