## Potential Acoustic Gain Calculator, Definition, and Articles

FAQ #3433 Updated October 20, 2017

## Question:

Is there an online calculator for Potential Acoustic Gain (PAG) of a sound system? What is a simple definition of Potential Acoustic Gain? Are there technical articles on PAG?

The PAG (Potential Acoustic Gain) calculation provides an estimate of how much louder a sound source (talker, singer, musical instrument) will be heard when the PA system is active. The PAG estimate is for the location of the observer / listener. The listener hears the sound source at level X when the PA system is off; the listener hears the sound source at a louder level Y when the PA system is on. The difference in decibels between X and Y is the Potential Acoustic Gain.

Online calulator: http://www.shure.com/americas/pagnag

This link explains the multiple factors of gain in a PA system: http://hyperphysics.phy-astr.gsu.edu/hbase/audio/pagi.html#c1

The five primary variables in the PAG equation are:
Ds = Distance source (distance from talker to microphone.) For maximum PAG, this distance must be as small as possible.
D1 = distance from microphone to nearest loudspeaker. For maximum PAG, this distance must be as large as possible.
D2 = distance from loudspeaker to nearest listener. For maximum PAG, this distance must be as small as possible.
Do = Distance observer (distance from talker to the listener.) This distance is determined by the room size and seat locations.
NOM = number of open microphones. For maximum PAG, this number must be a small as possible.

Below, as an attached file, is the first AES paper describing PAG: