Relationship between NC and RC ratings

摘要

The September 2000 issue of Noise/News International1 featured a paper entitled "Room Noise Criteria-The State of the Art in the Year 2000" by Gregory C. Tocci. The paper in part investigated the relationship between NC (noise criteria, tangency method), NCB (balanced noise criteria), and RC (room criteria) ratings for a series of 268 spectra measured in building spaces during the course of Cavanaugh Tocci Associates, Inc. consulting work. These spectra ranged from uniform to widely varying in shape. This presentation extends this work to document the relationship between RC and NC tangency ratings for 207 of these spectra.