摘要
在建筑隔声评价标准(GB/T 50121—2005)中,建筑构件隔声性能等级的划分并没有体现空气声隔声单值评价量的测量不确定度,这对建筑构件隔声性能的分级造成影响,给实验室对构件隔声性能的符合性判定带来困扰。对此,依据GUM法和ISO 12999-1:2020标准,确定建筑构件空气声隔声实验室测量结果不确定度的来源,建立不确定度数学分析模型,为建筑构件的各1/3倍频带的空气声隔声量以及空气声隔声单值评价量的不确定度分析提供依据,通过实例证明了不确定理论应用于空气声隔声测量的可操作性。通过计算17个构件的单值评价量不确定度,结果表明在100~5 000 Hz频率范围内,3种不同频谱修正的正全相关不确定度随计权隔声量的增加而增加,但前提是不同构件的各频带隔声量的标准不确定度相差较小。
In the evaluation standard for building sound insulation(GB/T 50121—2005), sound insulation grading of building elements does not reflect the measurement uncertainty of the single number quantity of airborne sound insulation,which troubles the sound insulation performance grading and the laboratory’s compliance determination of the building elements. Based on the GUM method and ISO 12999-1:2020 standard, this paper determines the source of uncertainty in the laboratory measurement of airborne sound insulation of building elements, establishes a mathematical analysis model of uncertainty and provides a basis for the uncertainty analysis of single number quantity and airborne sound insulation at each 1/3 octave band in building elements. The operability of the uncertainty theory in the measurement of airborne sound insulation is proved by examples. By calculating the uncertainty of single number quantity of 17 elements, the results show that full positive correlation uncertainty of three different spectrum adaptation terms increases with the increase of the weighting sound insulation from 100 Hz to 5 000 Hz, but the premise is that the standard uncertainty of the sound insulation at each frequency band of different elements has a small difference.
作者
黄海婵
Chen Khin Fai
HUANG Haichan;CHEN Khinfai(OFF(Guangzhou)Acoustic Testing Co.,Ltd.,Guangzhou 511447,China;Guangzhou Soundbox Acoustic Tech Co.,Ltd.,Guangzhou 511447,China)
出处
《电声技术》
2022年第3期9-16,共8页
Audio Engineering
关键词
空气声隔声
标准不确定度
单值评价量
频谱修正量
airborne sound insulation
standard uncertainty
single number quantity
spectrum adaptation term
