Polycom Vortex EF2280 - Page 52

CONFERENCE SYSTEM DESIGN
VORTEX EF2280 Reference Manual 50 Technical Support: 800.765.9266
To help you measure room gain, the EF2280 includes a room gain detector.
You should check your room gain after you have set up the EF2280.
Figure 29. Room Gain.
AEC
A
B
Room Gain = 20 log (B/A)