| 周期结构表面散射系数测试及修正方法* |
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| 引用本文： | 曾向阳,杜博凯,王海涛. 周期结构表面散射系数测试及修正方法*[J]. 应用声学, 2015, 34(5): 433-438 |
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| 作者姓名： | 曾向阳 杜博凯 王海涛 |
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| 作者单位： | 西北工业大学航海学院,西北工业大学航海学院,西北工业大学航海学院 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 无规入射散射系数是描述结构声反射特性的重要参数，在周期结构等典型扩散体的声学设计和室内声场模拟中具有重要的作用。本文给出了混响室法测试无规入射散射系数的原理，对正弦型周期结构进行了实验测试，并针对测试中存在的缺陷，提出了一种考虑空气间隙吸声的修正方法，经验证具有较好的修正效果。
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| 关 键 词： | 周期结构，散射系数，测量方法，空气间隙 |
| 收稿时间： | 2015-01-04 |
| 修稿时间： | 2015-08-27 |
Measurement and correction method of the surface scattering coefficient of a periodic structure |
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| zengxiangyang,DU Buokai and WANG Haitao. Measurement and correction method of the surface scattering coefficient of a periodic structure[J]. Applied Acoustics(China), 2015, 34(5): 433-438 |
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| Authors: | zengxiangyang DU Buokai WANG Haitao |
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| Affiliation: | the School of Marine Science and Technology of Northwestern Polytechnical University |
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| Abstract: | Random-incidence scattering coefficient is an important parameter to describe the property of sound reflection on the surface of a structure. This coefficient shows its great importance in the acoustic design of typical diffuser such as periodic structure and the indoor sound field imitation. This paper presents the measurement theory of the random-incidence scattering coefficient by the reverberation chamber method. The random-incidence scattering coefficient of a sine periodic structure was measured. Considering the defect of the measurement, a correction method of the measurement is proposed and it is proved to be effective. |
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| Keywords: | periodic structure scattering coefficient measuring method air gap |
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