InformeDesign: Glossary of Terms

privacy index
(PI)

A measure used to rate the speech privacy in a give space calculated from the Articulation Index. A rating of PI>95% indicates confidential speech privacy (can be heard but not understood); a rating between 95 and 80% indicates non-intrusive privacy (heard and understood, but not intrusive); and a rating <80% indicates poor privacy (nearby conversation can be heard and understood).