本文回顾了目前对暖通空调系统产生的噪声进行评级的方法，并解释了为什么这些评级在许多情况下不能与主观意见相关联。提出了一种全新的噪声等级分配方法，该方法有望在客观测量和主观响应之间提供更好的相关性。拟议的新评级方法使用了一组修订后的噪声标准曲线（RC曲线），该曲线首次出现在1980年ASHRAE手册系统卷第35章中。本文还讨论了导致RC曲线替代过去使用的NC曲线的发展的技术因素。引文:研讨会，ASHRAE交易，第87卷，第一部分，伊利诺伊州芝加哥

This paper reviews current methods of rating the noise produced by HVAC systems and explains why these ratings fail to be correlated with subjective opinion in many cases. An entirely new method of assigning noise ratings is proposed which is expected to provide a significantly better correlation between objective measurements and subjective response.The proposed new rating method makes use of a revised set of noise criterion curves (RC-Curves) which have appeared for the first time in Chapter 35 of the 1980 Systems Volume of the ASHRAE Handbook. This paper also discusses the technical considerations leading to the development of the RC Curves as a replacement for the NC Curves which have been used in the past.