【作者】 余江凌； 俞悟周；

【Author】 YU Jiang-ling;YU Wu-zhou;Institute of Acoustic, Tongji University;

【机构】 同济大学声学研究所；

【摘要】 利用传声分析(Acoustic Transmission Analysis)和吸声材料声阻抗的复合模型计算消声片的声阻抗,对扁矩形消声结构的消声系数和消声量进行了管道声传播精确二维理论计算模型、常用消声量工程经验模型的计算,并与实验结果进行比较。结果表明,本文采用的声阻抗复合计算模型结合精确二维理论可以得到较好的计算结果。更多还原

【Abstract】 The acoustic impedance of splitter sheet is calculated based on the theory of Acoustic Transmission Analysis and a composite model for calculating the acoustic impedance of sound absorption materials. The noise reduction of the rectangular splitter silencer is obtained by the two-dimensional theory of sound propagates in duct and some empirical models respectively. The calculation results are compared with measurement. It is showed that the composite acoustic impedance calculation model used in this paper combined with the two-dimensional theory gets a better performance.更多还原