城市区域环境噪声频谱分析

一、前言 目前,国内城市区域环境噪声标准GB3096—82、民用建筑声学设计规范和国际标准化组织环境噪声评价标准ISO 1996等均用A声级作为评价值,在《中华人民共和国建筑物内及建筑构件隔声的评价》和《ISO 717

Spectrum Analysis of Enviromental Noise in Urban Districts

This paper gives a detailed spectrum analysis on urban environment noise. From the analytical results, it can be seen that average octave-band sound levels of ambient noise are L₁₀>L_eq>K₅₀>L₉₀ and traffic noise level, industrial noise level and social noise level are A weighted sound levels.If ambient noise levels are substitute into different values (L_OB-L_A) between the octave-band sound level and A weighted sound level, it can be seen that the octave-band sound level relative to A weighted sound level L_OB-L'A of industrial noise, traffic noise or social noise is as much as the same average spectrum distributive regularity, so that common relative octave-band sound level can be used steadfastly by changing A weighted ambient noise level into the octave-band sound level. This investigation have come to the above mentioned conclusion, we can use average relative octave sound level measured in 36, points or noise rating curvers (NR curvers) by changing A-wei-ghted ambient noise level into the Octave-band sound level, this transformation will keep certain precision.