EAD, Equivalent Acoustic Distance - Is the farthest distance one can go from the source without
the need for sound amplification or reinforcement to maintain good speech intelligibility. It is a design
parameter dependent on the level of the presenter and the noise level in the room
PAG - Potent...
AVIXA CTS-D: PAG-NAG
EAD, Equivalent Acoustic Distance - Is the farthest distance one can go from the source without
the need for sound amplification or reinforcement to maintain good speech intelligibility. It is a design
parameter dependent on the level of the presenter and the noise level in the room
PAG - Potential Acoustic Gain
is the potential gain that can be delivered by the sound system without ringing and before feedback
occurs. It is based upon the number of open microphones, and the distances between source(s) (like a
presenter) and microphone(s), microphones to loudspeakers, and listeners to loudspeakers.
NAG - Needed Acoustic Gain
is to determine how much gain is needed to deliver the same level of sound to all the listeners in the
space
Is the gain the sound system requires to achieve an equivalent acoustic level at the farthest listener
equal to what the nearest listener would hear without sound reinforcement
Excessive background noise level will cause this to decrease.
Rule of Thumb for EAD for Voice - 4 ft (1.2 meters) is often a safe bet for voice. This assumes a 25
dB acoustic signal-to-noise ratio
Gain - Refers to the electronic amplification of a signal.
NAG Formula - 20 log (D0 / EAD)
in dB, and it indicates the amount of acoustical loss from the EAD position to the farthest listener.
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