| 多阶声模态分解的改进阻抗管法测量材料的高频吸声系数 |
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| 引用本文： | 孙中政,韩旭,王宇飞.多阶声模态分解的改进阻抗管法测量材料的高频吸声系数[J].声学学报,2022,47(2):229-240. |
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| 作者姓名： | 孙中政 韩旭 王宇飞 |
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| 作者单位： | 杜邦中国研发管理有限公司 上海 201203 |
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| 摘 要： | 为了测量高频材料吸声系数,采用声模态分解的方法,基于阻抗管构建测试设备,在阻抗管内测量超过平面波截止频率的的高频吸声系数.测量过程中,通过在阻抗管的周向和轴向分别布置传声器阵列,分离管道内前3阶周向声模态以及各阶声模态的轴向传播入射波和反射波,从而得到最高频率达10000 Hz的材料吸声系数,并通过对比常规阻抗管测试方...
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| 关 键 词： | 改进的阻抗管法 多阶声模态分解 高频吸声系数 管道声阵列 声模 态正交解耦 |
| 收稿时间： | 2021-01-12 |
High frequency sound absorption coefficient determination with multi-modal decomposition in improved impedance tube test method |
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| Affiliation: | DuPont China Research&Development and Management Co., Ltd, Shanghai 201203 |
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| Abstract: | For measuring the sound absorption coefficient in the higher frequency range,multi-modal decomposition method in impedance tube is used to measure material sound absorption coefficient over the cut-off frequency of plane wave in the tube.In the process of measurement,the microphone array is placed along the circumferential and axial directions of the tube,and then decompose the first three acoustic circumferential modes and their axial incident and reflected waves.These measurement data can be used to calculate the material sound absorption efficient up to 10000 Hz.At last the precision of the multi-modal decomposition method is validated by comparing the measurement results of the common impedance tube method. |
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