Page 154 - LNA Standards Manual 2019 Update

Speech privacy quantified: Speech Privacy Index (PI) is related to the Articulation Index (AI): Speech Privacy Index (PI) = (1-AI) x 100. A PI of 0 indicates a complete lack of privacy, a PI of 100 means complete privacy. Confidential, Privacy Index of 95 to 100: Conversations are unintelligible to casual listeners outside of a room. This level of privacy is typically achievable only in enclosed spaces and is generally only necessary for executive l

Acoustics     