Health Care System III | Advanced Use |
Room Size
This setting allows optimization of the echo canceller to the acoustic size of the room. Hard walls, many windows etc. might require higher settings than expected. Carpets, curtains etc. might require lower settings. Adjust the setting (NOTE: on the far end) if one of the following symptoms occur:
•There is still some echo of your own audio. Increase the setting.
•The system adapts slowly to acoustic changes in the room. Decrease the setting. After a change, the system will need a few seconds to
Motion
If you experience echo caused by movements in the room, increase the value.
Automatic Gain Control (AGC) Settings
Select ‘On’ to allow automatic adjustments (Automatic Gain Control) of audio levels. When ‘On’, the AGC maintains the audio signal level at a fixed value by attenuating strong signals and amplifying weak signals. Very weak signals, i.e. noise alone, will not be amplified.
Example: In most conferences, the participants will speak at different levels, and be at different distances from the microphones. As a result, some of the participants will be harder to hear than others. The AGC corrects this problem by automatically increasing the microphone levels when “quiet” or “distant” people speak, and by decreasing the microphone levels when “louder” people speak.
NOTE
TO ENSURE CORRECT BEHAVIOUR OF THE AGC, IT IS CRUCIAL THAT THE LEVELS ON THE INPUT CONNECTORS ARE ADJUSTED CORRECTLY
USING THE AUDIO INPUT LEVEL SETTINGS. THE AGC WILL NOT COMPENSATE FOR SEVERE MISADJUSTMENT OF INPUT LEVELS.
When applying a weak signal in the presence of strong background noise, the leveller might amplify the background noise as well as the signal. Therefore, in noisy environments, it is advisable to turn the leveller off.
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