Sonifex Redbox RB-AEC, Руководство пользователя

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7
Applications 3
Applications
How to Remove Delayed Presenter’s Audio From
Their Earpiece
The Problem:
Microphone audio from the presenter(s) is played aloud in the control
room/gallery, where a live microphone allows the director to talk to the
presenter(s) via their earpiece(s). This live microphone also inadvertently
picks up the presenter’s microphone audio and feeds it back to them in
delay, causing a disconcerting self-echo in their earpiece.
The Solution:
1. Connect the director’s microphone signal (at line level) to the RB-AEC
near-end input.
2. Connect the gallery monitor signal (at line level, containing the
presenter’s microphone audio) to the RB-AEC far-end input.
3. Connect the RB-AEC output(s) to the presenter’s earpiece(s). Turn on the
RB-AEC.
4. Allow the presenter(s) to talk for 1 minute without the director using
their microphone (though it must still be active). The RB-AEC will
learn the environment and the echo will gradually disappear from the
presenter’s earpiece(s). The coefficients are stored and loaded on power-
up. This process will not need repeating unless the environment changes.
Studio
Control Room/
Gallery
Amp
M
Amp
Line Level
Line Level
To Presenter’s
Earpiece