就管道通风系统而言,在研究其中的声场分布和同管道末端负载的相互作用影响时,对作为噪声源的流体风机的特征描述是一个关键环节。已往的一些研究往往采用基于管道中平面声波传播的一端或二端模型。而在很多实用场合,由于声源耦合入管道中的声波频率较高,需要考虑所激发出的高阶声场模态。文中提出了一种新的方法,用来在二端耦合的管道中存在高阶声波模态传播的情况下,测量描述这类稳态声源特征。 In the case of the duct ventilation system, characterization of the fluid fan as a noise source is a key aspect when studying the distribution of the sound field and the interaction with the end load of the pipe. Some previous studies often use one-end or two-end models based on planar acoustic wave propagation in pipes. However, in many practical applications, due to the high frequency of sound waves coupled into the pipe by the sound source, the excited high-order sound field modes need to be considered. In this paper, a new method is proposed to describe the characteristics of such steady-state sound sources in the presence of high-order acoustic modes propagating in two-end coupled pipelines.