0-9 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
A measure of the intelligibility of voice signals, expressed as a percentage of speech units that are understood by the listener when heard out of context. (188) Note: The articulation index is affected by noise, interference, and distortion.