Din En Iso 3382 3 E 2021 02 Pdf <Free Access>

): 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

): 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 standard defines several single-number quantities to evaluate acoustic performance: Spatial Decay Rate of Speech ( D2,Scap D sub 2 comma cap S end-sub ): The A-weighted sound pressure level of speech

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

): 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 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