A1. Glossary of Acoustical Terms and Abbreviations
A1.1 Abbreviations AI: articulation index
ASEL: A-weighted sound exposure level ASTC: apparent sound transmission class dB: decibel DNL: day - night level FSTC: field sound transmission class Hz: Hertz IIC: impact insulation class kHz: kilohertz
L eq , LA eq , LC eq : equivalent sound pressure level Lmax, LAmax: maximum fast sound pressure level NC: noise criteria NIC: noise isolation class NIPTS: noise induced permanent threshold shift NR: noise reduction Pa: Pascal POE: probable occupant evaluation (see room criteria) PTS: permanent threshold shift PWL: sound power level QAI: quality assessment index (see room criteria) RC: room criteria RT 60 : reverberation time 41 of 58 Spendiarian & Willis Acoustics & Noise Control LLC
12/15/2019
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