文章摘要
谭军,黄险峰.对噪声评价数的探讨[J].声学技术,2008,(2):240~243
对噪声评价数的探讨
Discussion about the noise rating number
投稿时间:2007-02-06  修订日期:2007-06-03
DOI:
中文关键词: 声学  噪声评价数  数值分析  噪声评价曲线  NR
英文关键词: acoustics  noise rating number  numerical analysis  noise rating curve  NR
基金项目:
作者单位
谭军 广西大学物理科学与工程技术学院, 南宁, 530004 
黄险峰 广西大学土木建筑工程学院, 南宁, 530004 
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中文摘要:
      文章分析了ISO标准中使用噪声评价曲线评价噪声的方法,使用Visual Basic编程实现了NR数的计算,并对其a、b值在31.5Hz进行扩充,得到a为55.4,b为0.681。分析了两种计算噪声评价数的方法,在要求的精度范围内,先计算各频段的NR值。然后找到最大值这种方法所用的时间最短。随着对精度要求的提高,使用倍频程已经不能满足要求,对1/3倍频程在31.5Hz到8000Hz进行了扩充,并使用数值分析方法模拟了噪声评价曲线的计算。
英文摘要:
      The evaluation methodology of Noise Rating Curve in ISO is analyzed.The calculation of Noi-se Rating Number(NR) is programmed utilizing Visual Basic and the constant a,together with b,is ex-panded to 31.5Hz(a=55.4,b=0.681).Two methods of calculation the NR are proposed.One of them is to seek the maximum of each NR which is calculated in each band separately,and this method takes shorter time to make evalustion.To meet the requirement of improving accuracy,the use of octave is no longer satisfied.So the constants a,together with b,for every 1/3 octave wihtin 31.5Hz and 8000Hz are expanded too.And the noise rating curver are simulated by numerical analysis method.
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