articulation index

6.03  articulation index. Numerical value indicating the proportion of an average speech signal that is understandable to an individual. See also C11.45.

Annotation 1      See ANSI/ASA S3.5.

Annotation 2      Although the term articulation sometimes has been used to mean intelligibility (as in the term Speech Intelligibility, see 6.73), preferred practice is to reserve the term articulation to describe the ability of humans to produce sounds which can be identified as speech.