声强法测定噪声源声功率的误差分析
Error analysis of sound power of noise sources by cross-spectral sound intensity method
本文以点声源和相干声源为例，采用数值仿真分析的方法，针对双传声器互谱声强的有限分误差分析离散 点声强法测定噪声源声功率的误差，并在半消声室中对点声源进行实验验证，结果表明，测点数目足够时，数值仿真方法可以准确地算出声源声功率级，在六面体包络面中，以1dB误差作参考，声功率的测试精度大于声强的测试精度。
声学工程
互谱声强数值仿真声功率误差
陆益民,纪明祥.声强法测定噪声源声功率的误差分析[EB/OL].(2015-09-21)[2025-09-27].http://www.paper.edu.cn/releasepaper/content/201509-187.点此复制
This paper takes the case of point source and coherent source,by the method of numerical simulation,aimed at finite difference of two microphone cross-spectral sound intensity,analyzes the error of sound power of noise sources in the method of discrete point sound intensity and carries on verification testing of point source in a semi anechoic-chamber,results show,When the number of measuring points is enough,numerical simulation can calculate sound source sound power precisely ,in the envelope surface of hexahedron ,take 1dB for reference,the accuracy of sound power is greater than that of sound intensity.
Cross-spectral sound intensityNumerical simulationSound powerError
展开英文信息
评论