剧院HVAC系统噪声评价方法研究

Noise Rating Method of HVAC System in Theater

由于HVAC系统噪声的特性不同于其他噪声,其能量常集中在人们不敏感的频域内,因此在评价方法上要和常规的噪声评价方法有所区别,剧院环境中的背景噪声往往属于此类噪声,它可能会影响某些观众的听闻质量。自从倍频带被提出以后,对这种噪声的评价变得可能。本文利用国际上常采用的NC、NCB、RC、RC Mark Ⅱ四种基于倍频带的噪声评价方法,分别对国内某大型剧院的HVAC系统噪声进行评价,结果表明RC Mark Ⅱ评价方法对于评价此类噪声具有一定优势。

Since the characteristics of HVAC systems noise are different from other types,and the energy of this noise is concentrated in the frequency domain that people is not sensitive to,the rating method should differ from common ones.The background noise in theater is often of this kind.It may affect the quality of what the audience heard.In this paper,we use four rating methods,NC,NCB,RC and RC Mark II,which are based on the octave band to assess the noise of the HVAC systems in a large theater of China.The experimental results show that RC Mark II rating method has certain advantages for the evaluation of this noise.