Polycom Vortex EF2241 Reference Manual page 63

Polycom ef2241 audio: user guide

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EFINITION OF

ERMS

room gain of this microphone channel is said to be 0 dB. If the reflected signal picked

up by the microphone is higher than the level of the signal sent to the line output to

your amplifier, that microphone channel has positive room gain. The more positive

the room gain, the harder the AEC must work to determine which signal is an echo

and which is a local speech signal.

EF2241 Reference Manual

ORTEX

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