Abstract: Present room emission limits of fixed equipment noise transmitted by structures are considered incapable to predict subjective perception rationally. In this study, white noise of 31.5 ~ 500 Hz octave bands through filtration is adjusted to the sound pressure levels (SPL) of standard limits to form the original sound samples. New sound samples are produced by moderately adjusting the SPL of these 5 octave bands. Subjective annoyance tests are carried out using paired comparison method. The results indicate that, under the condition of equal A-weighted SPL or equal loudness levels, the new sound samples, whose SPL of 31.5 Hz and 63 Hz octave bands are reduced and SPL of 125 Hz and 250 Hz and 500 Hz octave bands are increased, are less annoying than the original sound samples. There is a significant correlation between SPL of 31.5 Hz octave band and the subjective annoyance rating (p < 0.01), and Pearson’s correlation coefficient is 0.925 ~ 0.951.

Key words: acoustics, indoor low frequency noise, emission limits, subjective annoyance, octave band sound pressure levels

摘要： 我国现行的结构传播固定设备室内噪声排放限值不尽合理。通过将白噪声滤波获得31.5~500 Hz各倍频程带宽样本，调整其声压级至标准限值后合成原始声样本，并适当调整各倍频程频带声压级，合成新的声样本，采用成对比较法，对比研究各声样本的主观烦恼。结果表明，在A声级或响度级相同情况下，降低31.5 Hz与63 Hz倍频程频带声压级，并提高125 Hz、250 Hz及500 Hz倍频程频带声压级，声样本主观烦恼均小于原始声样本；在各倍频程中，31.5 Hz倍频程频带声压级与声样本主观烦恼度最为相关，且呈显著正相关（p < 0.01），Pearson相关系数为0.925~0.951。

关键词: 声学, 室内低频噪声, 排放限值, 主观烦恼, 倍频程频带声压级