| 加筋板材料辨识的导纳特征表达与冲击声特征提取 |
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| 引用本文： | 田旭华,陈克安,李晗,杨立学.加筋板材料辨识的导纳特征表达与冲击声特征提取[J].声学学报,2018,43(4):699-707. |
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| 作者姓名： | 田旭华 陈克安 李晗 杨立学 |
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| 作者单位： | 西北工业大学 航海学院环境工程系 西安 710072 |
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| 基金项目： | 航空科学基金项目(20131553018)资助国家自然科学基金项目(11574249) |
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| 摘 要： | 以表征物理属性的导纳特征为中间量,提取与加筋板材料属性有关的冲击声特征。先用相关分析方法获得金属加筋板物理属性的导纳特征表达以及导纳特征与冲击声特征之间的联系,间接得到表征声源物理属性的冲击声特征,然后通过支持向量机分类器验证不同特征在金属加筋板材料分类辨识中的性能。结果表明,所得的4组冲击声特征能准确识别出不同的材料,单个特征的识别率与对应材料属性的可分程度有关,理想冲击声声特征比音色特征的平均识别率更高。由此可见,利用导纳特征提取与材料属性相关冲击声特征的方法是有效的,且所提的特征能够很好的反映声源材料属性。
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| 关 键 词： | 关键词导纳 材料属性 声特征 辨识 冲击声 |
| 收稿时间： | 2017-02-06 |
The admittance feature representation and impact sound feature extraction for the material identification of ribbed plates |
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| Affiliation: | Department of Environmental Engineering, School of Marine Science and Technology Northwestern Polytechnical University Xi'an 710072 |
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| Abstract: | The admittance features representing the physical attributes are used as the intermediates to extract the material-attributes-related impact sound features of ribbed plates. Firstly, the admittance feature representations of metal ribbed plates are obtained and the relationships between the admittance features and the impact sound features are built via correlation analysis method, and material-attributes-related impact sound features are obtained indirectly. Then the performances of different sound features for the material recognition of ribbed-metal plates are verified through the Support Vector Machine classifier. The results indicate that, the obtained four sets of features mentioned above have a good accuracy about the materials of the metal ribbed plates, the accuracy of each set of features is related to the separable degree of the corresponding material attribute, and features extracted based on admittance functions have a higher average accuracy than timbre features. As a result, the method that extracting material-attributes-related sound features based on admittance features is efficient, and from which the sound features extracted have a better reflection on the physical attributes. |
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