【摘要】 在管道中对两个测点处实时测量所得数据作相关分析，可以测定试件的吸声性能。本文发展了一种复反射系数的改进算法，引入了以功率谱为基础的Ｇ函数来代替流行的传递函数，可使随机误差明显降低，并可保证所得实验结果合理、可靠。更多还原

【Abstract】 The acoustic properties in duct can be determined by means of twomicrophone position measurement. In this paper,an improved method to determine the complex reflection coefficient of the sample is developed, New functions Gm based upon power spectrum are introduced to replace the current transfer function.It is shown the test error is reduced remarkably and therefore a rational and reliable test resultcan be abtained.更多还原