Din En Iso 3382 3 E 2021 02 Pdf -

): The distance from a speaker where the Speech Transmission Index (STI) falls below 0.50, the point at which concentration starts to improve. Background Noise Level ( Lp,A,Bcap L sub p comma cap A comma cap B end-sub

): The average steady-state noise from HVAC or masking systems. Measurement Requirements INTERNATIONAL STANDARD ISO 3382-3 DIN EN ISO 3382 3 E 2021 02 pdf

): The reduction in sound pressure level (dB) when the distance from a speaker is doubled. Speech Level at 4 Meters ( ): The distance from a speaker where the

Lp,A,S,4mcap L sub p comma cap A comma cap S comma 4 m end-sub Speech Level at 4 Meters ( Lp,A,S,4mcap L

): A newer metric that has largely replaced "privacy distance" in recent revisions, indicating the distance at which speech becomes comfortable for others. Distraction Distance ( rDr sub cap D

): The A-weighted sound pressure level of speech at a 4-meter distance, indicating how much nearby surfaces reflect sound. Comfort Distance ( rCr sub cap C