摘要
为满足室内声级要求,ISO 717推荐采用单值隔声量Rw或Rw+C/Ctr表征建筑构件的隔声性能,并给出频谱修正量Ctr和C的计算方法,但工程实践中常遇到噪声敏感点暴露在多声源环境中,使Ctr或者C的选择变得困难。该文讨论了ISO 717中标准修正量曲线所带来的不确定性;推导出入射噪声频谱、室内噪声频谱和建筑构件单值隔声量之间的关系,提出一种基于统计算法确定构件单值隔声量的新方法;并以低频丰富的入射噪声为例,通过测试数据进行了频谱计算。计算结果表明,该方法能够根据入射噪声频谱特性自动选择采用Ctr或者C,并准确计算出具有统计意义的单值隔声量数值,可用于隔声设计前期确定构件所需的单值隔声量。
In order to meet indoor sound level requirements,ISO 717 recommends the use of single-valued sound reduction index R w or R w +C/C tr to represent the sound insulation performance of facade elements and provides the calculation methods for spectrum correction C tr and C,but in practice the noise sensitive area is often exposed to multiple sound sources so that it is difficult to choose C tr or C. This research discussed the uncertainty brought about by the standard correction curve in ISO 717,deduced the relationship between incident noise spectrum,indoor noise spectrum and single-valued sound reduction index of facade elements,and put forward a new method based on statistical algorithm to determine the single-valued sound reduction index of building components. The spectrum calculation based on the test data of low-frequency incident noise showed that the method can automatically select C tr or C according to the spectral characteristics of incident noise and accurately calculate the statistical value of single-valued sound reduction index,which can be used to determine the single-valued sound reduction index required by the component in the early stage of sound insulation design.
作者
盖磊
魏卫刚
GAI Lei;WEI Weigang(School of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan 250101,China;Apex Acoustics,Gateshead,UK,NE10 0JP)
出处
《建筑科学》
CSCD
北大核心
2019年第8期76-80,共5页
Building Science
基金
国家自然科学基金“基于详细规划层面的临街住区声环境控制研究”(51508312)
关键词
外立面隔声
单值隔声量
室内噪声频谱
入射噪声频谱
统计算法
facade sound insulation
single-valued sound reduction index
indoor noise spectrum
outdoor noisespectrum
statistical algorithm
